The Best Shower Filters of 2026, Ranked by Lab Results and Real Certifications
We compared 23 shower filters, from $29.00 to $239, on how much chlorine each removed when an independent tester measured it, whether it touched the chlorine byproducts you breathe in the steam, what it added to the water, and whether its certification is real. We looked up every NSF/ANSI 177 claim in the certifiers' own databases.
Best overall:Weddell Duo ($89.99, 8.4/10). The only filter we found both certified to NSF/ANSI 177 and independently tested, with chlorine and its byproducts (THMs) taken below detection[1][11].
Budget:Sprite Slim-Line 2 ($29.95, 4.3), certified, about $40 a year. Handheld:Aquasana AQ-4100 (5.0), the only pick whose tested filter is also sold as a handheld wand.
If your city uses chloramine: no shower filter is certified or independently tested for it. See your options, including whole-house.
Skip: “NSF certified” badges you can't find in a certifier's database, “tested to NSF 177” with no listing, and filters that add metals. Badge check.
Our #1 pick8.4/10
Weddell Duo Shower Filter
Chlorine 1.68 ppm → not detected, and every THM gone, in an independent test[11], backed by an NSF/ANSI 177 listing at 10,000 gallons[1].
A carbon-block filter that screws onto your shower arm, with about $60 a year in cartridges. The catches: it isn't built for chloramine, and Weddell's “only NSF-certified shower filter” claim is false[24].
How we score:Verified Chlorine 45%Chloramine 15%Byproducts (THMs) 15%Adds Nothing Unwanted 10%Proof 15%Full methodology ↓
The Clean Water Score (0–10) is our editorial judgment, not a medical or safety grade. Filters with no certification and no independent chlorine test aren't rated.
Know your shower water
What's in your shower, and what a filter can (and can't) do
City water is disinfected with chlorine or chloramine, and chlorine forms byproducts called trihalomethanes (THMs), like chloroform. A hot shower delivers them through the steam you breathe and your warm skin, and the showerhead grows its own biofilm.
Free chlorineWhat most cities use; carbon, copper-zinc (KDF), sulfite and vitamin C all react with it[72].
ChloramineChlorine bound to ammonia. Shower media barely touch it and nothing is certified for it. Vitamin C has bath-scale evidence against it; sulfite chemicals and long carbon contact work in treatment plants[81][82].
A 10-minute shower at least doubled blood and breath THMs in a controlled study; a cold drink of the same water didn't. Just 7 people, and blood levels aren't disease, but studies of 31 and 50 agree.
exhaled by 7 bathers in their warmest baths (up to 40 °C, 104 °F) than their coolest (30 °C), from skin uptake alone. Heating also raises THMs: exposure estimates ran 50% higher[89].
cut in free chlorine at 2.0 mg/L and 40 °C, through the rated gallons. It's the only thing NSF/ANSI 177 measures a filter removing: not chloramine, THMs, lead or bacteria.
sampled: mycobacteria were the most common bacteria, twice as abundant in U.S. homes on city water as on wells (DNA, not infections). An “antimicrobial” filter head made no difference[98].
with eczema in a randomized trial: a whole-home softener did no better than usual care. Evidence linking hard water to eczema is very low certainty[93], and shower filters don't soften water[10].
filters in Water Filter Guru's tests took THMs below its strictest guideline: the Weddell Duo and AquaTru Shower. So we score what testers measured, not the box.
Water Filter Guru, Sept. 2026
Check before you buy: chlorine or chloramine?
Your utility's yearly water quality report, or a phone call, tells you which disinfectant it uses[76]. Then look up any “certified” badge yourself.
Three essentials, plus a fourth for steam, heat and chloramine homes.
1Essential
Know your disinfectant
Look for “chlorine” or “chloramine” in your yearly water report, or call your utility[76]. More than 1 in 5 Americans get chloramine[74]; shower-filter certification covers only free chlorine[72].
Free chlorine: pick a filter with an NSF/ANSI 177 listing you can look up, an independent before-and-after test, or both[1][10]. Chloramine: nothing is certified for it[72]; see the options.
Follow the maker's schedule, as CDC advises[79]. The average American uses about 11 gallons a day in the shower[80], so a family of four empties a 10,000-gallon cartridge in about 7 months [our calculation].
Vent the steam, turn down the heat, or filter the whole house
Air and heat: run the fan or open a window[78][90]. Warm, not hot, water means less chloroform through skin[88]. Soak the head and hose in white vinegar when you see buildup[79].
Whole house: treats every shower and tap, can be sized for chloramine and certified for chloroform. See our whole-house rankings.
Chlorine: before → after in ppm, new filters (ND = not detected). NSF/ANSI 177: certified gallons.
Score = the Dr. Axe Clean Water Score (0–10), with our Water Filters guide's shower weights. Full methodology ↓
Verified On the certifier's listing, which we checked.Independent tester Water Filter Guru, an Amazon affiliate: colorimeter for chlorine, lab kit for THMs and metals.Maker's data The brand's claim or its own commissioned test.No data Nothing published.Fails, rises or contradicts Not designed for it, went up, or contradicts the listing.
Cartridge costs: 2 showers a day; see the cost chart. “Varies” = retail prices vary. *Jolie: NSF's listing shows 2,400 (in the column labeled flow; it can only be the capacity). Shaded rows missed our top 10.
Full reviews
The 10 best shower filters, ranked
Each review shows the proof behind its key numbers and how it fits your shower. One model per product line.
1
$89.99Not a sale price. Replacement set (sediment + carbon) $29.99.
The only shower filter we found with both a certification you can look up and an independent test showing chlorine and its byproducts gone. NSF lists the Duo under NSF/ANSI 177 for free chlorine at 10,000 gallons and 2.0 gpm. In Water Filter Guru's test, chlorine fell from 1.68 ppm to below detection on a handheld colorimeter, and all four disinfection byproducts its lab found in the tap water (three THMs totaling 8.83 ppb, plus bromochloromethane) were gone after filtering. It uses a sediment prefilter and a solid carbon block rather than copper-zinc media, so there's no reason to expect zinc to rise, though the tester published no metals results. Two cautions: it isn't built for chloramine, and Weddell's page calls it “the only shower filter certified by NSF to reduce Free Available Chlorine,” which isn't true: NSF lists six other companies' products under the same standard. That claim costs it a point on proof.
Best forChlorinated city water; anyone who wants THMs out of the shower too
Skip ifYour utility uses chloramine, or you'd rather have a filtered showerhead than an inline filter
StyleInline: screws onto your shower arm, and your own showerhead goes on the end
Flow1.42 gpm in the tester's shower, 82% of its unfiltered flow; rated 2.0 gpm on NSF's listing
Cartridge life10,000 gallons on NSF's listing; Weddell says change both cartridges every 5 to 6 months (one spot on its page says 8,000 gallons)
Yearly cost$59.98 at 2 showers a day (two $29.99 sets)
WarrantyLifetime (tester's summary)
Media: Sediment prefilter + solid activated-carbon blockCertification: NSF/ANSI 177, NSF listing: 10,000 gal at 2 gpm
Weddell's PFAS and particulate figures come from tests an IAPMO lab ran for Weddell to drinking-water protocols; NSF lists the Duo for chlorine only.
See score breakdown & sources
Verified Chlorine10.0
Chloramine2.0
Byproducts (THMs)10.0
Adds Nothing Unwanted9.0
Proof8.0
Chlorine scored from an independent colorimeter reading, 1.68 ppm → ND (not detected). Proof: certification we verified plus an independent test (9); −1: “Only shower filter certified by NSF to reduce Free Available Chlorine”: NSF lists six other companies' products under NSF/ANSI 177.
Certifier databaseNSF listings, NSF/ANSI 177 shower filters (current as of Sept. 28, 2026): 7 companies, 11 products, every claim “Free Available Chlorine Reduction.” Weddell Duo (WD-100), replacement WD-100F, 10,000 gal at 2.0 gpm. The Jolie Filtered Showerhead: the service-cycle (gallons) column reads 1.4 and the flow-rate (gpm) column reads 2400; a 2,400 gpm flow is impossible, so 2,400 can only be the capacity. Open source · [1]
Independent testerWater Filter Guru (Brian Campbell; Amazon Associate). Weddell Duo review (updated July 13, 2026): chlorine 1.68 → 0 ppm (handheld colorimeter); 4 byproducts to 0 (3 THMs totaling 8.83 ppb, plus bromochloromethane); 1.42 gpm; does not reduce chloramine; the tester notes KDF and calcium sulfite “perform better at higher temperatures.” Open source · [11]
Independent testerWater Filter Guru (Brian Campbell; Amazon Associate). Best shower head filters of 2026 (updated Sept. 7, 2026): real showers on Colorado city water; on-site colorimeter for chlorine; Tap Score lab kits for THMs and hardness; one sample per product. 13 filters tested; only the Weddell Duo and AquaTru Shower cut THMs below its most conservative guideline; none reduced hardness; Canopy 2.7 → 0.06 ppm chlorine, total THMs +158%. Open source · [10]
Maker's dataWeddell Water. Weddell Duo page ($89.99; “the only shower filter certified by NSF to reduce Free Available Chlorine”; “99% Chlorine Reduction – Certified by NSF in 2023”; PFAS and particulates “Verified by IAPMO Lab”; “up to 10,000 gallons” and “up to 8,000 gallons”; change every 5–6 months) (checked Sept. 28, 2026). Open source · [24]
Maker's dataWeddell Water. Test reports page: NSF/ANSI 177 data (≥87% minimum; 93.3% at 10,000 gallons, labeled 100% capacity; 95.5% at 8,000); certified by NSF in 2023 and “recertified in 2026”; PFAS test to an NSF/ANSI 53 protocol and particulates to NSF/ANSI 42 by IAPMO R&T's lab (checked Sept. 28, 2026). Open source · [25]
Maker's dataWeddell Water. Replacement cartridges (sediment + carbon “1+1” set $29.99) (Sept. 27, 2026). Open source · [26]
$174[28]cartridges a year at 2 months each (our calculation)
The strongest chlorine result of any filtered showerhead we found. Water Filter Guru measured 1.68 ppm before and 0.02 after, just under 99%, which beats Afina's own “up to 95%” claim, and flow didn't drop (1.85 gpm). But it isn't certified, the tester's lab found all three trihalomethanes higher in the filtered sample (bromoform up 78%, to 14.7 ppb; the total went from 15.03 to 27.75 ppb by our sum), and the tester published no metals results for its copper-zinc media. The cartridge is the expensive part: the product page says it lasts 2 months (the refill page says both 2 and 3), which works out to about $174 a year, and the warranty applies only if you subscribe.
Best forThe most chlorine out of a filtered showerhead, on chlorinated city water
Skip ifYou want certification, THM reduction or low running costs
Maker's dataAfina. Filtered Shower Head page ($129 sale, compare-at $179; “Filter lasts 2 months”) (Sept. 28, 2026). Open source · [27]
Maker's dataAfina. Replacement filter two-pack ($58 sale, compare-at $80; says both “replacing your filter every three months” and “Filter needs to be replaced every 2 months”) (Sept. 28, 2026). Open source · [28]
A strong chlorine performer in a sturdy metal housing, and the only filter here whose full lab metals panel showed nothing rising meaningfully: copper fell 83%, and the only rise was chromium, up 4.6% at a trace level. Water Filter Guru measured chlorine from 1.68 ppm to 0.23, an 86% cut, and flow held at 94% of baseline (1.63 gpm). The same lab found total trihalomethanes higher in the filtered sample (15.03 to 32.42 ppb, with chloroform at 20.6 ppb where the tap sample showed none); the tester attributes swings like this to changes in the water between samples, but it's still not a THM filter. Three of Filterbaby's product pages for this filter say it's “IAPMO certified to NSF 177 Standards”; IAPMO lists no Filterbaby product (the tester reports certification as pending), and that claim costs it a point on proof. Its main page says “3rd-party tested to exceed NSF 177 standards” and claims chloramine and lead reduction; we found no published report for any of that. Note that the tester reviewed the Pro Series inline filter ($139), not Filterbaby's Showerhead Pro.
Best forKeeping your own showerhead; buyers who want metal instead of a plastic housing
StyleInline, metal housing; your own showerhead goes on the end
Flow1.63 gpm, 94% of unfiltered flow (tester)
Cartridge lifeAbout 3 months (maker, per the tester); no gallon rating
Yearly cost$196 (4 × $49)
Warranty90 days; lifetime only with a refill subscription (tester)
Media: Pleated sediment filter + activated carbon fiberCertification: None found in NSF, IAPMO or WQA databases
See score breakdown & sources
Verified Chlorine8.6
Chloramine2.0
Byproducts (THMs)1.0
Adds Nothing Unwanted10.0
Proof5.0
Chlorine scored from an independent colorimeter reading, 1.68 → 0.23 ppm (86.3% cut). Proof: independent test, no certification (6); −1: Three Filterbaby listings of this filter say “IAPMO certified to NSF 177 Standards”; IAPMO lists no Filterbaby product (the tester reports certification as pending).
Maker's dataFilterbaby. Pro Series Titanium Aluminum Shower Filter ($139; “3rd-Party Tested To Exceed NSF 177 Standards”) (Sept. 28, 2026). Open source · [29]
Maker's dataFilterbaby. Get Filterbaby Pro Series Titanium Aluminum Shower Filter ($139; “IAPMO certified to NSF 177 Standards – the gold standard in filtration”; the same line appears on two other Filterbaby listings of this filter) (Sept. 28, 2026). Open source · [31]
Certifier databaseIAPMO R&T product listing directory, NSF/ANSI 177 (checked Sept. 28, 2026): 14 listing files from 12 companies, all for free chlorine. Open source · [2]
Maker's dataFilterbaby. Pro shower filter replacement ($49) (Sept. 28, 2026). Open source · [30]
3,000 gal[14]cartridge life, about 90 days (maker)
Near-complete chlorine removal, with the most worrying metals result on this page. Water Filter Guru measured chlorine from 2.70 ppm to 0.06, a 97% cut (the review body misprints the result as 0.6; the roundup and the percentage match 0.06). But its lab found lead 404% higher in the filtered sample, a rise the tester said “seems less likely to be incidental” and wants to retest, plus zinc up 8,797% and copper up 32% (both within the lab's guideline) and total trihalomethanes up 158%. Canopy says its filter is “tested to ANSI/NSF-177 standards”; we found no published report and no listing in the NSF, IAPMO or WQA databases. It's a well-designed head with strong flow (2.33 gpm), but the cartridge lasts only about 3,000 gallons.
Best forStrong flow and near-total chlorine removal in a designer head
Skip ifMetals in your water matter to you, or you want certification
StyleFixed showerhead; a handheld version is sold separately (not tested)
Flow2.33 gpm (tester)
Cartridge life3,000 gallons or about 90 days (maker, per the tester)
Yearly cost$148 (4 × $37); $100 on the filter subscription (4 × $25)
Warranty1 year (tester)
Media: Granular activated carbon + copper-zinc (KDF) + calcium sulfiteCertification: None found in NSF, IAPMO or WQA databases
See score breakdown & sources
Verified Chlorine9.7
Chloramine2.0
Byproducts (THMs)1.0
Adds Nothing Unwanted3.0
Proof6.0
Chlorine scored from an independent colorimeter reading, 2.70 → 0.06 ppm (97% cut). Proof: independent test, no certification (6).
Independent testerWater Filter Guru (Brian Campbell; Amazon Associate). Canopy shower filter review (updated July 22, 2026): chlorine reading 97% lower (body text prints 0.6 ppm); lead +404%, zinc +8,797%, copper +32%; tested with cold water; the tester says skin doesn't absorb lead; 2.33 gpm; 3,000-gallon cartridge. Open source · [14]
Independent testerWater Filter Guru (Brian Campbell; Amazon Associate). Best shower head filters of 2026 (updated Sept. 7, 2026): real showers on Colorado city water; on-site colorimeter for chlorine; Tap Score lab kits for THMs and hardness; one sample per product. 13 filters tested; only the Weddell Duo and AquaTru Shower cut THMs below its most conservative guideline; none reduced hardness; Canopy 2.7 → 0.06 ppm chlorine, total THMs +158%. Open source · [10]
Maker's dataCanopy. Filtered Showerhead page ($150; filter subscription $135, then $25 every 90 days; filter-and-aroma plan $125, then $40 every 90 days; “Tested to ANSI/NSF-177 standards”; says its media ingredients “have been shown to help reduce” chloramine among others; “Filter is not independently tested for all contaminants”) (Sept. 28, 2026). Open source · [32]
Maker's dataCanopy. Showerhead filter ($37; $27 on subscription) (Sept. 27, 2026). Open source · [33]
2,000 gal[4]IAPMO NSF/ANSI 177 listing at 1.55 gpm
$233[35]cartridges a year at the certified capacity
The other filter that took trihalomethanes out: Water Filter Guru's lab found 15.03 ppb in the tap water and none after the AquaTru. It's certified too: IAPMO has listed it under NSF/ANSI 177 since June 11, 2026, at 2,000 gallons and 1.55 gpm (the tester's review still says “pending”). The weak spot is chlorine itself: the tester's colorimeter showed a 44% cut (1.68 to 0.94 ppm) on a new filter, second-lowest among certified filters tested (the Sprite Slim-Line 2 measured 42%). It adds catalytic carbon, the media used for chloramine in whole-house systems, and AquaTru's filter page even calls it “certified to reduce … chloramines”; its IAPMO listing covers free chlorine only, there's no chloramine data, and that claim costs it a point on proof. Copper rose 24% in the filtered sample, and the small cartridge makes it one of the costlier filters to run.
Best forTHM reduction from a certified showerhead
Skip ifYou want the most chlorine removed for the money
Cartridge life2,000 gallons on IAPMO's listing; AquaTru says every 90 days, and its manual says 1,300 gallons (per the tester)
Yearly cost$233 at 2,000 gallons ($39.95 each); $359 at 1,300
Warranty1 year (tester)
Media: Copper-zinc (KDF) + calcium sulfite + catalytic carbonCertification: NSF/ANSI 177, IAPMO listing: 2,000 gal at 1.55 gpm
See score breakdown & sources
Verified Chlorine4.4
Chloramine2.0
Byproducts (THMs)10.0
Adds Nothing Unwanted7.0
Proof8.0
Chlorine scored from an independent colorimeter reading, 1.68 → 0.94 ppm (44% cut). Proof: certification we verified plus an independent test (9); −1: AquaTru's replacement 3-pack page says “Four-stage filtration certified to reduce chlorine, chloramines”; IAPMO's listing covers free chlorine only.
Certifier databaseIAPMO R&T listing W-30733, NSF/ANSI 177-2023: AquaTru ATSH01–ATSH04, replacement ATSH01-F, 2,000 gal at 1.55 gpm, free chlorine; effective June 11, 2026, to June 30, 2031. Open source · [4]
$74.99 (sale)Sale price without a showerhead (MSRP $119.99); $79.99 sale with one (MSRP $139.99); handheld wand $84.99–$89.99 sale. Replacement $62.99.
Cut THMs 73%, zinc flag
Aquasana AQ-4100 Shower Filter
Inline, with a showerhead or as a handheld wand · carbon + KDF
3.7 ppm[16]zinc after filtering, above the lab's 2 ppm guideline
>91.61%[38]chlorine in Aquasana's own test to the NSF/ANSI 177 protocol
One of only three filters that cut trihalomethanes meaningfully, at a sale price of $74.99. Water Filter Guru's lab found total THMs 73% lower after filtering (chloroform and one other THM stayed above its health guideline). Chlorine fell 57% on the tester's colorimeter (2.70 to 1.14 ppm), well short of the more than 90% Aquasana reports from its own NSF/ANSI 177-protocol test at Pace Analytical, which isn't a certification. The concern is zinc: it rose to 3.7 ppm in the filtered water, above the lab's 2 ppm guideline, which the tester attributes to the copper-zinc media; copper rose 58%. And Aquasana's shower page carries the “78 contaminants” list, including chloramines, from its Claryum drinking filters, which this filter doesn't use.
Best forA low-cost filter that cut THMs; the only pick whose tested filter is also sold with a head or as a handheld wand
Skip ifMetals leaching into your water concerns you
StyleInline, with a showerhead, or as a handheld wand (same filter)
Flow1.54 gpm (tester); rated 2.5 gpm
Cartridge life10,000 gallons or 6 months (maker)
Yearly cost$125.98 (2 × $62.99)
Warranty1-year limited warranty and a 90-day satisfaction guarantee (Aquasana); extended under its Water for Life program
Media: Coconut-shell carbon + copper-zinc (KDF)Certification: None found in NSF, IAPMO or WQA databases
See score breakdown & sources
Verified Chlorine5.7
Chloramine2.0
Byproducts (THMs)7.3
Adds Nothing Unwanted3.0
Proof5.0
Chlorine scored from an independent colorimeter reading, 2.70 → 1.14 ppm (57% cut). Proof: independent test, no certification (6); −1: The shower page lists the “78 contaminants” (including chloramines and THMs) from its Claryum drinking filters; the shower filter isn't Claryum, and its data sheet covers free chlorine only.
Independent testerWater Filter Guru (Brian Campbell; Amazon Associate). Aquasana shower filter review (updated Apr. 28, 2026): chlorine 2.70 → 1.14 ppm; total THMs −73%; zinc +40,924% to 3.7 ppm (Tap Score guideline 2 ppm); copper +58%; tested with cold water; 1.54 gpm. Open source · [16]
Maker's dataAquasana. AQ-4100/4105 performance data sheet: tested to NSF/ANSI 177 by Pace Analytical (commissioned by Aquasana), 1.95 mg/L free chlorine, 2.5 gpm, >91.61% overall, 81.05% at 9,000 gal; 10,000-gal capacity. Open source · [38]
Maker's dataAquasana. Shower filter without shower head ($74.99 sale, MSRP $119.99; with head $79.99 sale, MSRP $139.99; wands $84.99–$89.99 sale; “Independently tested to NSF/ANSI Standard 177 to reduce over 90% of chlorine for 10,000 gallons or up to 6 months”; the page's contaminant list reads “Our patented Claryum® technology reduces 78 contaminants,” including chloramines; “1-Year Limited Warranty and a 90-Day Satisfaction Guarantee”) (Sept. 28, 2026). Open source · [37]
Maker's dataAquasana. Water filter replacements: shower filter replacement cartridge ($62.99; $53.54 with Water for Life) (Sept. 28, 2026). Open source · [39]
Inexpensive and simple, but it removed about half the chlorine. Water Filter Guru measured 2.70 ppm before and 1.23 after (54%), against Hello Klean's claim that each capsule removes “over 90% of chlorine, heavy metals, and impurities.” THMs were a wash: chloroform fell 8% while two others rose, which the tester attributes to changes in the water between samples. It isn't certified and doesn't claim to be, and the tester published no metals results for its copper-zinc media. One flag: its post-filter reading is identical to the Jolie's (1.23 ppm) from the same round of tests.
Best forAn inexpensive inline filter for chlorinated water
Cartridge lifeAbout 3,400 gallons (13,000 liters) or 3 to 4 months
Yearly costAbout $137 at 3.4 capsules ($40 each)
Warranty1 year (maker)
Media: Copper-zinc (KDF) + calcium sulfite + activated carbon + ceramic beadsCertification: None found in NSF, IAPMO or WQA databases
See score breakdown & sources
Verified Chlorine5.4
Chloramine2.0
Byproducts (THMs)3.0
Adds Nothing Unwanted7.0
Proof6.0
Chlorine scored from an independent colorimeter reading, 2.70 → 1.23 ppm (54% cut). Proof: independent test, no certification (6).
Independent testerWater Filter Guru (Brian Campbell; Amazon Associate). Hello Klean shower filter review (updated June 11, 2026): chlorine 2.70 → 1.23 ppm; chloroform −8%, bromochloromethane −36%, bromodichloromethane +23%, dibromochloromethane +47%; about 3,400 gal per cartridge; 1.58 gpm. Open source · [17]
Maker's dataHello Klean. Shower Filter page ($55; “reduces chlorine, heavy metals, rust and odour”) (Sept. 28, 2026). Open source · [40]
Maker's dataHello Klean. Refill capsule ($40; “Replace every 3–4 months to remove over 90% of chlorine, heavy metals, and impurities”) (Sept. 28, 2026). Open source · [41]
2,400 gal[1][44]NSF/ANSI 177 listing, in the column labeled flow; it can only be the capacity (vs 10,000 in its own report)
0.42 ppm[18]zinc after filtering, up 4,520% (independent lab)
$185[43]cartridges a year at the certified capacity
Certified, but on narrower terms than its marketing. NSF now lists the Jolie under NSF/ANSI 177; its listing shows 2,400 (in the column labeled flow; it can only be the capacity) and 1.4 in the gallons column, which we read as 2,400 gallons at 1.4 gpm. Jolie's own test report, run at Kymera's lab (Kymera makes the KDF media inside), says it cut chlorine by more than 66% through 10,000 gallons. On a new filter, Water Filter Guru measured 54% (2.70 to 1.23 ppm), THMs didn't change, and zinc rose from 0.009 to 0.42 ppm, still below the lab's 2 ppm guideline. A proposed class action filed in March 2026 alleges its “removes chlorine” claims are false; these are allegations, and we found no ruling. Replacing the filter at the certified 2,400 gallons, rather than every 90 days as Jolie suggests, costs about $185 a year.
Best forA certified filtered showerhead with strong flow (2.20 gpm)
Cartridge life2,400 on NSF's listing (in the column labeled flow; it can only be the capacity); Jolie says every 90 days
Yearly costAbout $185 at 2,400 gallons ($38 each); $152 at 90 days
Warranty60 days (tester)
Media: KDF-55 + calcium sulfiteCertification: NSF/ANSI 177, NSF listing: 2,400 gal at 1.4 gpm
See score breakdown & sources
Verified Chlorine5.4
Chloramine1.0
Byproducts (THMs)3.0
Adds Nothing Unwanted5.0
Proof8.0
Chlorine scored from an independent colorimeter reading, 2.70 → 1.23 ppm (54% cut). Proof: certification we verified plus an independent test (9); −1: Jolie's published test report says it cut chlorine by more than 66% through 10,000 gallons; NSF's listing shows 2,400 (in the column labeled flow; it can only be the capacity).
Certifier databaseNSF listings, NSF/ANSI 177 shower filters (current as of Sept. 28, 2026): 7 companies, 11 products, every claim “Free Available Chlorine Reduction.” Weddell Duo (WD-100), replacement WD-100F, 10,000 gal at 2.0 gpm. The Jolie Filtered Showerhead: the service-cycle (gallons) column reads 1.4 and the flow-rate (gpm) column reads 2400; a 2,400 gpm flow is impossible, so 2,400 can only be the capacity. Open source · [1]
Independent testerWater Filter Guru (Brian Campbell; Amazon Associate). Jolie shower filter review (updated Aug. 20, 2026): chlorine 2.70 → 1.23 ppm (colorimeter; the method paragraph also mentions a test strip); no change in THMs; zinc 0.00919 → 0.42455 ppm (“Zinc isn't known to have health effects in shower water”); tested with cold water; 2.20 gpm; still lists “Certifications: None.” Open source · [18]
Maker's dataJolie. Product Test Reports (2025), all commissioned by Jolie: chlorine test at Kymera Labs, Oct. 2024, 2.0 mg/L at 41 °C and 80 psi, “over 66% of free chlorine through 10,000 gallons”; a 4-week, 32-person skin study (corneometer, vapometer, pH meter, expert grading; no comparison group); a 12-week, 27-person hair-shedding study; three lab tests on hair samples (color, porosity, frizz). (copy on file with DrAxe.com) · [44]
Maker's dataJolie. Filtered Showerhead page ($169; $148 with subscription; “The only clinically proven shower filter, backed by 6 independent third-party studies”; “filters chlorine, heavy metals, bacteria, and scale”) (Sept. 28, 2026). Open source · [42]
Maker's dataJolie. Replacement filter ($38; KDF-55 and calcium sulfite) (Sept. 28, 2026). Open source · [43]
Public record / studyClassAction.org. Rusow et al. v. Jolie Skin Company, Inc., No. 3:26-cv-02411 (U.S. District Court, Northern District of California), filed Mar. 19, 2026 (published Apr. 9, 2026): California and New York plaintiffs allege Jolie's “removes chlorine” claims are false because its filters reduce chlorine by roughly 66%, per Jolie's own testing. Allegations only. Open source · [100]
Public record / studyTruth in Advertising (TINA.org). Ad Alert: Jolie filtered showerhead (May 27, 2025): a “risk-free” 60-day trial charged the full $152 unless the showerhead came back within 10 days (Jolie says returns within 60 days get a full refund); Jolie didn't provide substantiation for its chlorine and heavy-metal claims. Open source · [101]
Price varies (retail)Sold at The Home Depot, Walmart and Amazon; we couldn't confirm a price on Culligan's own store. The handheld HSH-C135 uses the same WHR-140 cartridge and listing.
Certified, sold at big-box stores
Culligan WSH-C125 Filtered Showerhead
Filtered showerhead · 5 spray settings · media not disclosed · NSF/ANSI 177
10,000 gal[7]IAPMO NSF/ANSI 177 listing at 1.8 gpm, through 2031
Not testedno independent chlorine test; scored at the certified-filter median (49%)
2[54]WHR-140 cartridges a year at its 6-month limit
A certified filtered showerhead from a household name, with no independent test. IAPMO lists the WSH-C125 and its handheld sibling, the HSH-C135, under NSF/ANSI 177 at 10,000 gallons and 1.8 gpm through 2031; both take the WHR-140 cartridge. No independent tester has measured it, so we score its chlorine at 4.9, the median cut of the four certified filters that were tested (Culligan doesn't disclose the media, so there's no closer match); for the same reason it gets the lowest chloramine credit and no THM credit. Culligan's cartridge page calls the WHR-140 “IAPMO R & T Tested and Certified” and lists it for use with the ISH-100, ISH-200, ISH-200c and RDSH-C115 too; IAPMO certifies it only in the WSH-C125, HSH-C135, S-H200 and S-W100. We couldn't confirm a price on Culligan's own store on Sept. 28; it's sold at The Home Depot, Walmart and Amazon, where prices vary.
Best forA certified filtered head you can pick up at a big-box store
Skip ifYou want an independently tested filter, or THMs out
StyleFixed wall-mount head with 5 spray settings; the HSH-C135 handheld uses the same cartridge and listing
Flow1.8 gpm on IAPMO's listing
Cartridge life10,000 gallons or 6 months (Culligan)
Yearly cost2 WHR-140 cartridges a year; prices vary by retailer
Warranty1-year limited (Culligan)
Media: Not disclosed (Culligan says it reduces chlorine, sulfur odor and scale)Certification: NSF/ANSI 177, IAPMO listing: 10,000 gal at 1.8 gpm
See score breakdown & sources
Verified Chlorine4.9
Chloramine1.0
Byproducts (THMs)3.0
Adds Nothing Unwanted7.0
Proof7.0
Certified with no independent test: chlorine scores 4.9, the median cut of all four tested certified filters (42%, 44%, 54% and 100%), since its media isn't disclosed. Proof: certification we verified, no independent test (7).
Certifier databaseIAPMO R&T listing WP-12222: Culligan WSH-C125 and HSH-C135 (WHR-140), 10,000 gal at 1.8 gpm, free chlorine; to Aug. 30, 2031. No IAPMO certificate lists the ISH-100. Open source · [7]
Maker's dataCulligan filter store. WSH-C125 wall-mount filtered showerhead ($59.99 on Sept. 27, 2026; the store's domain redirected to a parked page on Sept. 28). (copy on file with DrAxe.com) · [53]
Maker's dataCulligan filter store. WHR-140 replacement cartridge ($17.99, out of stock; “Use with Culligan ISH-100, ISH-200, ISH-200c, WSH-C125, HSH-C135 and RDSH-C115 / IAPMO R & T Tested and Certified”; 10,000 gallons or 6 months) (Sept. 27, 2026). (copy on file with DrAxe.com) · [54]
Maker's dataThe Home Depot. Culligan Showerhead Water Filter System with Massage Feature, WSH-C125 (listing found Sept. 28, 2026; price varies). Open source · [55]
Maker's dataWalmart. Culligan WSH-C125 filtered wall-mount showerhead listings (found Sept. 28, 2026; price varies by seller). Open source · [56]
Maker's dataAmazon. Culligan WSH-C125 wall-mounted filtered shower head, and Culligan's WHR-140 replacement cartridge (listings found Sept. 28, 2026; price varies). Open source · [57]
The least expensive certified filter to buy: $29.95, and about $40 a year in cartridges. IAPMO lists it under NSF/ANSI 177 at 10,000 gallons and 2.5 gpm through 2029. In Water Filter Guru's cold-water test, though, chlorine fell only 42% (2.70 to 1.54 ppm) on a new cartridge, below the 50% the 40 °C certification test requires; the tester suggests differences in temperature, pressure and water may explain part of the gap. THMs barely moved, and zinc rose more than 13,500% in the filtered sample (the level wasn't published). Sprite's home page lists “Combined Chlorine (Sodium Hypochlorite)” among what its media removes; sodium hypochlorite is free chlorine, not chloramine.
Best forA certified filter on a tight budget
Skip ifYou want most of the chlorine out, or a metal housing
Cartridge life10,000 gallons or 6 months (Sprite and IAPMO)
Yearly cost$39.90 (2 × $19.95)
Warranty1 year, housing only; register within 15 days (tester)
Media: Chlorgon: copper-zinc (KDF) + calcium sulfite (per the tester)Certification: NSF/ANSI 177, IAPMO listing: 10,000 gal at 2.5 gpm
Same product lineT3 Source Showerhead $199.99
A Sprite-made private label: IAPMO lists T3's 73311 under Sprite's file as a version of a Sprite model that takes the SLC cartridge, the same one in the Slim-Line 2, so we count it as part of that line. Certified at 10,000 gallons and 1.75 gpm, with 7 spray settings, for $199.99. Scored from the SLC cartridge's test: 42% chlorine cut and a sharp zinc rise. At the SLC's 6-month rating, its $29.99 cartridges cost about $60 a year.[6][5][19][49][50]
4.0/10
See score breakdown & sources
Verified Chlorine4.2
Chloramine1.0
Byproducts (THMs)3.0
Adds Nothing Unwanted5.0
Proof9.0
Chlorine scored from an independent colorimeter reading, 2.70 → 1.54 ppm (42% cut). Proof: certification we verified plus an independent test (9).
Certifier databaseIAPMO R&T listing W-9269, NSF/ANSI 177-2023: Sprite Industries. SL2-XX-R (SLC cartridge) 10,000 gal at 2.5 gpm; HO2-XX-R (HOC) 25,000 gal at 2.5 gpm; AGE-XX-Y (SLC) 10,000 gal at 1.75 gpm; effective Sept. 30, 2024, to Sept. 30, 2029. Open source · [5]
Independent testerWater Filter Guru (Brian Campbell; Amazon Associate). Sprite Slim-Line 2 review (updated Apr. 28, 2026): chlorine 2.70 → 1.54 ppm; “Both of our tests were conducted with cold water”; temperature, pressure and water differences may explain part of the gap with the certifying lab; THMs down 1–7%; zinc +13,500%; about 1.6 gpm. Open source · [19]
Maker's dataSprite. Slim-Line 2 page ($29.95–$69.95; “Certified to NSF/ANSI Standard No.177”; SLC cartridge rated 6 months or 10,000 gallons) (Sept. 28, 2026). Open source · [45]
Maker's dataSprite. Replacement cartridges (SLC $19.95, 6 months; HOC $29.95, 12 months) (Sept. 27, 2026). Open source · [47]
Maker's dataSprite. Home page: Chlorgon media removes “Free Chlorine (Cl-)” and “Combined Chlorine (Sodium Hypochlorite).” Open source · [48]
A shower filter's price is mostly its cartridges. We assume 2 showers a day, 8 minutes each, at 2.0 gpm, the WaterSense maximum[77]: 11,680 gallons a year, about what a household of three uses at 11.1 gallons a person a day[80] [our calculation]. Each cartridge is replaced at its gallon rating or its time limit, whichever comes first; we use the certified gallons where there's a listing.
Up to $150 a yearMore than $150 a yearShorter bar = cheaper to run
Sprite High Output 2$39.95–$79.95 · certified$30a year1 cartridge × $29.95: 25,000 gallons or 12 months[47]
Cartridges a year = the larger of 11,680 ÷ rated gallons and 12 ÷ rated months, at each brand's one-time price on Sept. 27–28, 2026. Where a brand gives a range (Weddell 5–6 months, Hello Klean 3–4, AquaBliss 3–6, Hammerhead 6–12), we use the longer end. AquaTru's manual says 1,300 gallons, which would make it about $359 a year[15]; Jolie at its suggested 90 days would be about $152[42]. Subscriptions can cut these further: Canopy's filter subscription charges $25 every 90 days instead of $37[32][33]. The T3 Source uses the SLC cartridge's 6-month rating[47]. The Culligan WSH-C125 and Kohler Aquifer aren't charted: they're sold at retail, where cartridge prices vary (both need 2 cartridges a year at their 6-month limits)[54][51]. The average shower is 7.8 minutes and about 15.8 gallons[80].
Chlorine, measured
Chlorine before and after, in a real shower
One independent tester, Water Filter Guru, measured free chlorine on site with a handheld DPD colorimeter, before and after each new filter, in two rounds of tests. The ring is the tap water; the dot is what came out. Brands' own lab figures are in the second panel, because they aren't independent.
Free chlorine, tap vs. filtered (independent colorimeter)
What the brands' own labs report (not independent)
Weddell Duo[25]Weddell's own NSF/ANSI 177 test at 10,000 gal, its full rated capacity (≥87% minimum across the run)93.3%
Aquasana AQ-4100[38]Pace Analytical test Aquasana commissioned, average over 10,000 gal (81.05% at 9,000)>91.61%
Rorra[64][63]Kymera (KDF media maker): average through 4,000 gal, its recommended ~90-day life (80.3% average at 8,000)90.9%
Jolie[44]Kymera test Jolie published, through 10,000 gal>66%
Certification floor[72]What NSF/ANSI 177 requires through the rated gallons, at 2.0 mg/L and 40 °C50%
A colorimeter reading by an independent reviewer counts as an independent field measurement, one step below an accredited lab; chlorine fades too fast to ship to a lab. A reviewer's test strip would count only as maker-level data, and so do Quality Water Lab's strip results, which we don't use[23]. Each filter was tested once, new, on Colorado city water[10], and in cold water[19][18] (58–69 °F where the tester logged it[11][12]); certification tests run filters to the end of their rated gallons at 40 °C (104 °F)[72], and the tester notes that copper-zinc and sulfite media work better hot[11], so results can differ. Rorra's and Jolie's reports come from Kymera, which makes the KDF media inside both[64][44].
What rose
What rose in the filtered water
Copper-zinc (KDF) media works by giving up zinc and copper as it reacts with chlorine. In every independent lab panel of a KDF filter we found, zinc or copper rose after filtering. Here's how much, against the tap sample, on a log scale.
ZincLeadCopperRed figure = above the lab's health guideline, or lead
ZincAquasana AQ-4100#6 · $74.99 (sale)+40,924%410× the tapto 3.7 ppm, above Tap Score's 2 ppm guideline[16]
ZincSprite Slim-Line 2#10 · $29.95–$69.95+13,500%136× the taplevel not published[19]
ZincCanopy#4 · $150+8,797%89× the tapwithin the lab's guideline; level not published[14]
ZincJolie#8 · $169+4,520%46× the tap0.0092 → 0.42 ppm[18]
ZincAquaBliss SF100$35.99+3,228%33× the tap0.0092 → 0.31 ppm[20]
LeadCanopy#4 · $150+404%5.0× the taplevel not published; tester plans a retest[14]
CopperAquasana AQ-4100#6 · $74.99 (sale)+58%1.6× the taplevel not published[16]
CopperCanopy#4 · $150+32%1.3× the tapwithin the lab's guideline[14]
CopperAquaTru Shower#5 · $149+24%1.2× the tap0.274 → 0.341 ppm[15]
Filterbaby Pro Series: Copper −83% (0.274 → 0.047 ppm); no metal rose meaningfully (chromium +4.6%, trace)[13]
AquaBliss SF100: Lead −72% and copper −68%, even as zinc rose[20]
Values are from Water Filter Guru's Tap Score lab kits, one sample before and one after each new filter. Tap Score's health guideline for zinc is 2 ppm; only the Aquasana went above it. For lead, EPA's health goal is zero[75]; the Canopy's lead rise may be leaching or may be incidental, and the tester plans a retest. The tester published no metals results for the Weddell, Afina, Hello Klean, Hammerhead or eskiin, and it attributes some other rises (fluoride, arsenic) to changes in the water between samples, so we don't score those. The tester notes that zinc isn't known to have health effects in shower water[18] and that skin doesn't absorb lead[14]. Still, a filter shouldn't add metals, so these rises cost points.
Badge vs. database
What brands claim vs. what the certifier's database shows
NSF/ANSI 177 is the only certification for shower filters, and it covers free chlorine only. We looked up every certification claim these brands make in NSF's, IAPMO's and WQA's databases. The mismatches are some of the most useful things on this page.
Certification claims, checked
20certification claims checked across 11 brands and one filter medium
8verified in the NSF, IAPMO or WQA database
6tested or “tested to,” but not certified
6contradicted by the database or not in it
VerifiedTested, not certifiedDoesn't matchNot in any database
Weddell#1 · 8.4/10[24][1][25]NSF/ANSI 177Verified · NSF: 10,000 gal at 2.0 gpm“Only shower filter certified by NSF”Doesn't match · NSF lists 6 other companiesPFAS and particulatesTested, not certified · IAPMO lab test for Weddell; not certified
Jolie#8 · 4.7/10[1][44][42]NSF/ANSI 177Verified · NSF listing shows 2,400 (in the column labeled flow; it can only be the capacity)“Over 66% through 10,000 gallons”Doesn't match · the listing's 2,400 is the only possible capacity“Only clinically proven shower filter”Tested, not certified · maker-commissioned studies (skin, hair, one chlorine test)
AquaTru#5 · 5.7/10[4][36]NSF/ANSI 177Verified · IAPMO: 2,000 gal at 1.55 gpm, since June 11, 2026“Certified to reduce chlorine, chloramines” (3-pack page)Doesn't match · IAPMO lists free chlorine only
Sprite#10 · 4.3/10[5][45]“Certified to NSF/ANSI Standard No. 177”Verified · IAPMO: SL2 10,000 gal; HO2 25,000 gal
T34.0/10[6]NSF/ANSI 177Verified · IAPMO: 10,000 gal, private label of a Sprite model
Culligan#9 · 4.6/10[7][54]WSH-C125, HSH-C135Verified · IAPMO: 10,000 gal at 1.8 gpmWHR-140 cartridge “Tested and Certified”Verified · listed only in the WSH-C125, HSH-C135, S-H200 and S-W100, not every housing it fits
Aquasana#6 · 5.0/10[37][38]“Independently tested to NSF/ANSI 177”Tested, not certified · Pace test Aquasana paid for; no listingClaryum “78 contaminants” on the shower pageDoesn't match · belongs to its drinking filters
Canopy#4 · 6.0/10[32]“Tested to ANSI/NSF-177 standards”Tested, not certified · no report published; no listing
Filterbaby#3 · 6.1/10[31][2][29]“IAPMO certified to NSF 177 Standards” (3 listings)Not in any database · IAPMO lists no Filterbaby product“3rd-party tested to exceed NSF 177”Tested, not certified · no report published
RorraNot rated[64][63]“91% … NSF-177”Tested, not certified · Kymera (media maker) lab, through 4,000 gal; Rorra says not yet certified
AquaYouthNot rated[67][1][2][3]“The only shower filter … NSF/ANSI 177 certified”Not in any database · no listing under its name; about 21 companies are listed
KDF-55 mediaFilter media[71][9]“Certified by NSF to NSF/ANSI Standard 42”Verified · for material safety only (max 250 g/L), not chlorine removal
Checked Sept. 27–28, 2026. NSF lists 11 shower products from 7 companies[1], IAPMO 14 listing files from 12 companies[2] and WQA 5 models from 2 companies[3]. “Tested to NSF 177” means the brand paid a lab to run the protocol; it isn't certification, and the lab may belong to the media supplier. The “[G]” and “[Pb]” marks on some NSF listings refer to lead-free materials in the device, not lead removal[1]. We didn't check UL or CSA directories.
How we score: the Dr. Axe Clean Water Score™ for shower filters
This is the same Clean Water Score, with the same shower weights, as our Water Filters guide. It puts verified chlorine removal first, because that's what a shower filter is for, then chloramine, the byproducts you breathe in the steam, anything the filter adds, and proof. It's an editorial assessment built from certifier databases and one independent tester's measurements, not our own lab testing and not a medical grade. Price isn't part of the score; it's in each review and the cost chart.
Verified Chlorine45%
Free chlorine measured before and after filtering by an independent tester. The measured cut sets the score (99% = 9.9). A certified filter with no independent test scores the median of the tested certified filters with the same media.
Chloramine15%
No shower filter is certified or independently tested for chloramine. Vitamin C media earns maker-level credit (5); carbon 2; copper-zinc or sulfite alone 1.
Byproducts (THMs)15%
Trihalomethanes in an independent lab test: not detected after filtering scores 10, a cut of 10% or more scores the percentage ÷ 10 (73% = 7.3), no clear change or no data 3, a rise 1.
Adds Nothing Unwanted10%
Metals that rose in the filtered water in an independent lab panel, against the tester's health guideline. Copper-zinc or undisclosed media with no published metals results scores 7.
Proof15%
A certification you can find in the NSF, IAPMO or WQA database plus an independent test scores 9; certification alone 7; an independent test alone 6. Each certification or contaminant claim the database contradicts, or borrowed from another product, costs 1.
Not ratedGate
No NSF/ANSI 177 listing and no independent chlorine test means no score, however good the brand's own lab report looks. To make the top 10, a filter also needs a price we could confirm, or a certification and named retailers.
Measured beats marketed. Chlorine is scored from an independent reviewer's before-and-after reading: the cut the tester prints, divided by 10 (97% scores 9.7; not detected scores 10). We use the tester's printed percentage, or calculate it from its readings where it prints only “just under 99%.” A handheld DPD colorimeter reading counts as an independent field measurement, one step below an accredited lab; no shower filter has a lab chlorine result, because chlorine fades before a sample reaches one. A reviewer's test strip counts only as maker-level data. A certified filter with no independent test scores the median cut of the tested certified filters with the same main media: 44% for copper-zinc filters (42%, 44% and 54%), or 49% across all four tested certified filters when the media isn't disclosed. That keeps an untested product from outscoring a tested one on a class average. If a maker's sibling with the same media or the same certified cartridge was measured, we use that result instead, including its metals result (Sprite's High Output 2 and the T3 Source, from the Slim-Line 2).
Chloramine. No shower filter is certified for chloramine, and none has an independent test. Vitamin C media scores 5, maker level, because a utility and the USDA Forest Service show the chemistry works but no product has been tested; carbon of any kind scores 2, because a shower gives it about a second of contact; copper-zinc or sulfite alone, or undisclosed media, scores 1. A chloramine claim with no product data adds nothing, and a vitamin C “infusion” with no stated amount earns no vitamin C credit. A vitamin C filter that left free chlorine untouched in testing gets no vitamin C credit either, since vitamin C reacts with free chlorine even faster.
Byproducts and metals. THMs not detected after filtering in an independent lab score 10; a cut of 10% or more scores the percentage ÷ 10; no clear change, a mixed result or no data scores 3 (most filters don't cut THMs); a rise of more than 10% scores 1. For metals, a full lab panel with nothing rising meaningfully scores 10; no published metals results scores 9 for carbon-only media and 7 for copper-zinc or undisclosed media; a modest copper rise 7; zinc up more than 1,000% but below the lab's guideline 5; any lead rise, or any metal above the lab's guideline, 3. The lowest finding applies.
Proof, and the claims vs. listing rule. A certification we found in NSF's, IAPMO's or WQA's database, at the listed gallons and flow, plus an independent test scores 9; certification alone 7; an independent test alone 6. Each certification or contaminant claim the database contradicts costs 1 point, up to 2: a false “only certified” claim, a certification the databases don't show, a capacity the listing doesn't support, a chloramine certification the listing doesn't include, or a certification or contaminant claim borrowed from another product. “Tested to NSF 177” isn't certification; it earns nothing and costs nothing, and we show it in the badge check. Performance claims a test contradicts are already reflected in the chlorine score, so we don't deduct them twice.
Not rated, and who's eligible. A filter with no certification and no independent chlorine test isn't rated, however good its own lab report looks (Rorra's comes from its media supplier's lab). To make the top 10, a filter needs a price we could confirm on the brand's U.S. store on Sept. 28, 2026, or, if it's certified, a listing at named national retailers (shown as “price varies”). One model per product line: a private-label version of the same certified cartridge counts as the same line. Filters that tie at one decimal are ranked by their unrounded score. Lawsuits are reported as allegations and don't change a score unless there's a ruling or settlement with named terms.
One caveat applies to every score: every chlorine, THM and metals figure comes from a single tester, Water Filter Guru, which earns Amazon affiliate commissions, tests one new filter per product on Colorado city water, and ran two rounds with different tap water[10]. We use it because it's the only independent source that measures chlorine before and after on site, and we flag its internal inconsistencies where we found them.
Why most shower filters can't handle chloramine
More than 1 in 5 Americans get chloramine in their water[74], and no shower filter has proof it removes it. That's our dividing line: we give chloramine credit only where the chemistry is documented, and we tell chloramine households plainly that a shower filter isn't the answer.
The test leaves it out
NSF/ANSI 177 test water must contain less than 0.1 mg/L of chloramine, because it “can interfere” with common shower media, and certified filters must say performance with chloramine hasn't been evaluated[72][73].
About a second of contact
At 2 gpm, water spends roughly 0.8 seconds in each 100 mL of filter media [our calculation]. Dialysis centers give carbon 10 minutes to remove chloramine[81]. Free chlorine reacts fast enough at shower speed; chloramine doesn't.
Copper-zinc makes no chloramine claim
KDF's maker says its media removes up to 99% of chlorine and says nothing about chloramine; its NSF listing is for material safety, not chlorine removal[71][9].
Vitamin C: plausible, unproven in a shower
One gram of vitamin C neutralizes 1 mg/L of chlorine in 100 gallons, very fast[82], and 1,000 mg cleared chloramine from a bathtub in a utility test. That utility reported that some vitamin C shower attachments did remove chloramine, but that their replacement claims appeared overstated; it named no products, and none is certified[81]. Utilities also use sulfite chemicals and long carbon contact. Vitamin C doesn't remove THMs that have already formed[83].
What to do: check your water report. If it says chloramine, the sturdier fix is a whole-house catalytic-carbon system sized for it (our whole-house rankings). If you want a shower filter anyway, vitamin C is the chemistry with direct bath-scale evidence; replace it more often than the box says.
Do shower filters help your health? What the evidence shows
The exposure is real: showering moves chlorine byproducts into your blood more than drinking the same water does, and hot water makes it worse. What's missing is proof that a shower filter changes any health outcome. We found no study showing a shower filter lowers blood THMs or improves skin, hair or breathing. Here's how we'd grade it:
A 10-minute shower at least doubled median blood and breath THMs at two homes (7 people), while a cold drink didn't; the average blood rise was 358 pg/mL in the higher-THM home and 79 in the lower one. Studies of 31 and 50 adults found showers raised blood THMs too.
Chloroform exhaled through skin uptake in the warmest baths (up to 40 °C) vs the coolest (30 °C), in 7 bathers compared at 2 or 3 temperatures. Heated tap water also carries more THMs: 50% higher exposure estimates.
Top vs bottom quarter of shower and bath time weighted by home THM levels, in 1,219 cases and 1,271 controls in Spain. An association in one study, not proof of cause.
Improvement at 12 weeks with a whole-home softener vs usual care, in 336 children: no added benefit. Shower filters don't soften water, and no trial has tested them on eczema.
Children in harder-water areas had higher odds of eczema across 7 observational studies (385,901 people). Hard water leaves more soap on skin; a clear effect of chlorine wasn't seen.
Free chlorine at this level lowered the skin's water-holding capacity in 20 people with eczema after a 10-minute, 40 °C soak; healthy skin was affected only at 2 mg/L. One session, a surrogate measure.
We found no study of tap-water chlorine and hair. The evidence is from swimming pools, where long soaks can weather hair (green tints come mostly from copper).
Airborne THM exposure in 16 showers and 7 baths in three real homes was about 30% lower than in lab shower chambers, likely because homes have more air exchange. That supports running the fan, but we found no study of a fan's effect on blood levels.
A filter head sold as antimicrobial matched a plain head for waterborne pathogens over 84 days, and a carbon filter failed to reduce two lung-infection mycobacteria in another study.
Front Microbiomes, 2023; Front Public Health, 2020
Two practical points follow. First, the three filters that cut THMs in testing all contain carbon (the Weddell's is a solid block)[11][15][16], though several other carbon filters didn't; copper-zinc, sulfite and vitamin C stop chlorine but don't pull out THMs already in the water[83]. Second, a filter head doesn't sterilize your shower: mycobacteria thrive in showerheads[97], so clean the head and hose and replace cartridges on time[79].
How to read a shower filter's box
NSF/ANSI 177 is an “aesthetic” standard for free chlorine[72]; standard showerheads use 2.5 gpm, and WaterSense models no more than 2.0[77]. Here's what the common claims mean.
On the box
What it tells you
Where to check it
NSF/ANSI 177 certified
Two filters cut 2.0 mg/L of free chlorine by at least 50% through the rated gallons, at 40 °C and 80 psi. Chlorine only.
NSF, IAPMO or WQA directory (search the model)
“Tested to NSF 177”
The brand paid a lab to run the protocol. Not a certification; the lab may be the media supplier's.
Ask for the report and the lab's name
Rated gallons and flow
Certification counts only at the listed capacity and flow. At 2 showers a day you use about 11,680 gallons a year.
The certifier's listing
Copper-zinc (KDF-55)
Converts free chlorine to chloride; releases zinc and copper as it works. Its NSF listing is for material safety only.
NSF listing for KDF; a lab metals panel
Calcium sulfite
Fast chlorine reducer. Doesn't remove THMs or chloramine in any published shower test.
Independent before-and-after test
Carbon block or granular carbon
Removes chlorine and, in solid-block form, THMs in testing. Short contact time limits chloramine.
A lab THM test
Vitamin C
Neutralizes chlorine and chloramine quickly; doesn't remove THMs; cartridges may run out sooner than claimed.
No certification exists; look for data
“[G]” or “[Pb]” on a listing
Lead-free materials in the device (NSF/ANSI 372), not lead removal.
The listing's footnotes
“Removes 99% of chlorine”
Usually from the maker's own test on a new filter. Independent readings ranged from 0% to not detected.
An independent before-and-after reading
More picks by category
Best options if your city uses chloramine
No shower filter has shown it removes chloramine[72]. The AquaTru adds catalytic carbon, the media used for chloramine in whole-house systems, and it's our pick among rated filters, though it has no chloramine data; its filter page calls it “certified to reduce … chloramines,” but its IAPMO listing covers free chlorine only[36][4]. The other routes:
The chemistry with direct bath-scale evidence against chloramine[82][81], but none is certified or independently tested; see Sonaki, Voesh, AquaYouth and AquaHomeGroup below. A utility reported that some did remove chloramine but that their replacement claims appeared overstated, so replace often.
Not rated
·
Whole-house catalytic carbonDealer or $1,000+
Sized for chloramine contact time and certifiable for chloroform; it treats every tap and shower. See our whole-house rankings.
Option
Best filtered showerheads and handhelds
Want to replace the head rather than add an inline filter? These are the rated showerheads, plus the Aquasana, which is also sold as a handheld wand ($84.99–$89.99 on sale) with the same filter; Culligan's HSH-C135 handheld shares the WSH-C125's cartridge and listing. The T3 Source counts with Sprite's line.
A Sprite-made private label: IAPMO lists T3's 73311 under Sprite's file as a version of a Sprite model that takes the SLC cartridge, the same one in the Slim-Line 2, so we count it as part of that line. Certified at 10,000 gallons and 1.75 gpm, with 7 spray settings, for $199.99. Scored from the SLC cartridge's test: 42% chlorine cut and a sharp zinc rise. At the SLC's 6-month rating, its $29.99 cartridges cost about $60 a year.[6][5][19][49][50]
4.0/10
Best shower filters under $60
Low upfront cost and, for the two Sprites, low running costs: about $30 to $40 a year in cartridges.
Sprite's larger inline filter. IAPMO lists it under NSF/ANSI 177 at 25,000 gallons and 2.5 gpm, and its $29.95 cartridge lasts 12 months, about $30 a year. Not independently tested; we score it from its Slim-Line 2 sibling, which uses the same Chlorgon media in a smaller cartridge, including the sharp zinc rise the tester found.[5][46][47][19]
Certified or independently tested, and scored just below our top 10.
1
Hammerhead Shower Filter$109.95 (sale)
An inline KDF and calcium sulfite filter in a lead-free brass housing: Water Filter Guru measured chlorine from 1.68 ppm to 0.77 (54%), and all three THMs were higher in the filtered sample. Not certified; Hammerhead says it's “3rd party tested” but publishes no report. $109.95 on sale in chrome (compare-at $139.95); cartridge $37.95 on sale.[22][58][59]
4.3/10
2
Kohler Aquifer K-22321Price varies (retail)
IAPMO lists it under NSF/ANSI 177 at 8,000 gallons and 3 gpm; Kohler's spec sheet gives 8,000 gallons or six months and a 4.0 gpm maximum flow. KDF 55 media and no independent test, so its chlorine scores 4.4, the median of the tested certified copper-zinc filters. Sold at retailers including Ferguson and Lowe's; kohler.com blocked our price check on Sept. 28.[8][51][52]
4.3/10
Filters we couldn't rate
Each of these has no NSF/ANSI 177 listing we could find and no independent chlorine test, so we don't give it a score. Several make claims no shower filter has been certified for.
·
Rorra Filtered Showerhead$239
Rorra's chlorine data come from Kymera's lab (a WQA satellite lab run by the company that makes the KDF media inside it), so we count them as maker data: 91% average through 4,000 gallons, its recommended ~90-day life; at 8,000 gallons, twice that, single filters fell to 54% and 60%. Rorra says it isn't certified yet, and apart from a structural test at IAPMO's lab it has no independent test. With no certification and no independent chlorine test, it isn't rated. $239 one-time; $199 is the subscription price.[64][63][62]
Not rated
·
Sonaki Tornado Vita C Filtered Showerhead$127.99 (sale)
A vitamin C head that claims to remove “99% of chlorine & chloramines.” The chemistry is plausible, but we found no certification or product test; a utility reported that some vitamin C attachments did remove chloramine but that their replacement claims appeared overstated.[65][81]
Not rated
·
Voesh Vitamin C Shower Filter$29
Says it's “clinically tested to help remove up to 99% of chlorine, heavy metals, rust, calcium buildup, and microplastics.” We found no test data behind that, and no certification.[66]
Not rated
·
AquaYouth 2.0 Carbon Shower Filter$59.99 (sale)
Calls itself “the only shower filter on the market that is NSF/ANSI 177 certified.” NSF, IAPMO and WQA show no listing under its name, and they list about 21 companies under that standard. Offers a refillable vitamin C housing ($14.95).[67][1][2][3]
Not rated
·
AquaHomeGroup 20-Stage with Vitamin C & E$29.95
Claims chlorine, chloramine and heavy-metal reduction from 20 stages including vitamin C and KDF-55. No certification or test data found; vitamin cartridges are replaced every 4 to 6 weeks.[68]
Not rated
·
Kind Showerhead$99.99 (sale)
A KDF-55, “amino acid granule” and carbon handheld. No certification, test data or replacement interval found.[69]
Not rated
·
Crystal Quest Shower Filter$40.95–$44.95
Claims chloramines, VOCs, THMs and heavy metals. The only test we saw mentioned is a 500-gallon lab result reported second-hand; we couldn't find it. Its “compare-at” price ($29.50) is lower than its price.[70]
Not rated
What about Jolie, Canopy and Aquasana?
These three are among the most-advertised shower filters. Here's what the records and the tests show, plus what our #1 pick's page gets wrong.
Jolie: certified, with a lawsuit pendingNSF lists the Jolie Filtered Showerhead under NSF/ANSI 177; its listing shows 2,400 (in the column labeled flow; it can only be the capacity) and 1.4 in the gallons column[1]. Jolie's own report, from Kymera's lab, says it cut chlorine by more than 66% through 10,000 gallons[44]. Water Filter Guru measured 54% on a new filter, no change in THMs and zinc up to 0.42 ppm[18]. In a proposed class action filed March 19, 2026 (Rusow et al. v. Jolie Skin Company, Inc., No. 3:26-cv-02411, N.D. Cal.), California and New York buyers allege that Jolie's “removes chlorine” claims are false because, per Jolie's own testing, it reduces chlorine by roughly 66%[100]. These are allegations; we found no ruling. In 2025, Truth in Advertising reported that Jolie's “risk-free” 60-day trial charged the full $152 unless the showerhead came back within 10 days (Jolie says returns within 60 days get a full refund), and that Jolie didn't provide substantiation for its chlorine and heavy-metal claims when asked[101]. Jolie calls it “the only clinically proven shower filter”[42]. Its six studies are ones Jolie commissioned: one chlorine test at Kymera's lab, a 4-week, 32-person skin study and a 12-week, 27-person hair-shedding study, neither with a comparison group, and three lab tests on hair samples[44]. None is a certification, and no database can confirm “only.”
Canopy: near-total chlorine removal, and a lead riseCanopy's filter took chlorine from 2.70 to 0.06 ppm, but lead in the filtered sample was 404% higher, zinc 8,797% and copper 32% higher, and total THMs rose 158%[14][10]. The tester said the lead rise “seems less likely to be incidental” and plans a retest. Canopy says it's “tested to ANSI/NSF-177 standards”; we found no report and no listing[32].
Aquasana: a borrowed contaminant list, and zinc above the guidelineAquasana's shower page lists the “78 contaminants,” including chloramines, that its Claryum drinking-filter technology reduces; the shower filter isn't Claryum, and its data sheet covers free chlorine only, from a Pace Analytical test Aquasana commissioned (more than 91.61% on average)[37][38]. The tester measured 57% chlorine reduction, a 73% cut in THMs, and zinc at 3.7 ppm after filtering, above its lab's 2 ppm guideline[16].
Weddell, our #1: better product than its claimsWeddell says the Duo is “the only shower filter certified by NSF to reduce Free Available Chlorine” and pairs “99% Chlorine Reduction” with “Certified by NSF in 2023”[24]. NSF lists six other companies' products under the same standard, and its listing gives no percentage[1]; Weddell's own test page shows at least 87% throughout and 93.3% at 10,000 gallons, its full rated capacity[25]; its product page gives both 8,000 and 10,000 gallons as the cartridge life. Its PFAS and particulate results come from tests an IAPMO lab ran for Weddell, not a certification. The false “only” claim costs it a point.
Rorra: a supplier's labRorra advertises 91% chlorine reduction “across 4,000 gallons · NSF-177”[62], and its own report supports that: a 90.93% average through 4,000 gallons, the ~90-day life Rorra recommends. The test ran on to 8,000 gallons, twice that life, where single filters fell to 54% and 60%[64][63]. The report comes from Kymera, a WQA satellite lab run by the company that makes the KDF media inside Rorra's filter, so we treat it as maker data. Rorra says it isn't certified yet, and apart from a structural test at IAPMO's lab it has no independent test[63]. With no certification and no independent chlorine test, we don't rate it.
Our adviceLook up any certification claim yourself in NSF's, IAPMO's or WQA's directory[1][2][3], treat “tested to” as the brand's own data, and favor filters with an independent before-and-after test.
What we'd skip
These were independently tested and did the least with your chlorine.
1
AquaBliss SF100$35.99
A best-selling 12-stage filter that cut chlorine only 30% (2.70 to 1.88 ppm) in Water Filter Guru's test, the lowest of any filter that reduced it at all. Zinc rose from 0.009 to 0.31 ppm in the filtered water; lead and copper fell. Its vitamin C and tourmaline “infusion” comes with no stated amount or test, so it earns no vitamin C credit.[20][60]
3.5/10
2
eskiin Filtered Showerhead$149
Removed no chlorine in Water Filter Guru's test: 1.68 ppm before, 1.79 after. Its cartridge lists vitamin C, KDF-55 and carbon among “15 layers,” and all three THMs were higher after filtering. Because vitamin C neutralizes free chlorine very fast, a vitamin C filter that leaves chlorine untouched earns no vitamin C credit from us.[21][82]
2.1/10
When the label promises more than the test finds
Beyond the certification mismatches in the badge check, these are the biggest gaps between what brands print and what testers or certifiers found. Brand figures are in gold, certifier and maker-lab figures in gray-green, the independent tester's in teal. The tester's chlorine readings are single, new-filter, cold-water results; certification tests run at 40 °C, where copper-zinc and sulfite media work better[72][11].
The Weddell Duo is the other filter that beat its own number: “99% chlorine reduction” on its page, not detected in the tester's shower[24][11].
DA
Dr. Axe's Take
Your shower is one of the biggest exposures to chlorine byproducts in your day. Hot water turns chloroform into steam you breathe, and warm skin absorbs more of it, so a good shower filter is worth having. But this category runs on claims, so here are my non-negotiables.
First, know what your city adds. If your water report says chloramine, most shower filters won't do much, and I'd put the money toward a whole-house system instead. Second, buy proof: a listing I can find in NSF's, IAPMO's or WQA's database, or an independent before-and-after test, ideally both. “Tested to NSF standards” on a box is neither.
Third, change the cartridge on time, keep the water warm rather than scalding, and run the fan. Filtering the water, venting the steam and turning the heat down work together. And keep the water you drink just as clean, with a certified drinking-water filter in the kitchen.
— Dr. Axe
Frequently asked questions
What is the best shower filter?
The Weddell Duo ($89.99, 8.4/10). It's the only shower filter we found with both an NSF/ANSI 177 listing you can look up (10,000 gallons at 2.0 gpm) and an independent test in which chlorine fell from 1.68 ppm to below detection and all three trihalomethanes disappeared. It's an inline filter, so you keep your showerhead, and cartridges cost about $60 a year. It isn't built for chloramine. For a showerhead, the Afina removed about 99% of chlorine but isn't certified; for THMs from a certified head, the AquaTru Shower; on a budget, the certified Sprite Slim-Line 2 ($29.95).
Do shower filters actually work?
For free chlorine, many do, but results vary widely. In one independent tester's showers, new filters ranged from no chlorine removed (eskiin) to below detection (Weddell Duo), and only 2 of the 13 it tested took trihalomethanes below its most conservative guideline. It tested in cold water; copper-zinc and sulfite media work better hot. None reduced hardness. Certification means a filter cut free chlorine by at least half through its rated gallons in a lab. We found no study showing a shower filter improves a health outcome.
Do shower filters remove chloramine?
Not in any certification or independent test. NSF/ANSI 177 keeps chloramine out of its test water, and certified filters must say they haven't been evaluated with it. No shower filter is certified or independently tested for chloramine. Vitamin C neutralizes it quickly (a utility found 1,000 mg cleared a bathtub). That utility reported that some vitamin C shower attachments did remove chloramine, but that their replacement claims appeared overstated; it named no products, and none is certified. For chloramine homes, whole-house catalytic carbon sized for chloramine is the sturdier route.
What does NSF/ANSI 177 certified mean?
Two filters were run in a lab with 2.0 mg/L of free chlorine in 40 °C (104 °F) water at 80 psi and had to cut it by at least 50% through the gallons on the label. It's an aesthetic standard: free chlorine is the only thing it measures a filter removing (it also checks materials and structural strength), so it says nothing about chloramine, THMs, lead or bacteria. “Tested to NSF 177” by a lab the brand hires isn't the same thing. Search the exact model in NSF's, IAPMO's or WQA's directory.
Are vitamin C shower filters worth it?
The chemistry is sound: 1 gram of vitamin C neutralizes 1 mg/L of chlorine in 100 gallons, very quickly, and it works on chloramine too; a utility reported that some vitamin C shower attachments did remove chloramine. But no vitamin C shower filter is certified, we found no independent product test, vitamin C doesn't remove THMs already in the water, and the same utility found replacement claims appeared overstated. If your city uses chloramine, it's the most plausible shower option; replace it often.
Can a shower filter help eczema, dry skin or hair?
The evidence is thin. In the only full randomized trial, whole-home water softeners didn't improve children's eczema (336 children). Chlorine's own role is uncertain: in a small lab study, 0.5 mg/L lowered the skin's water-holding in people with eczema. We found no tap-water study on hair and no trial of shower filters on skin or hair. And shower filters don't soften water.
Do shower filters remove chloroform and other THMs?
Most don't. In independent tests, the Weddell Duo and AquaTru Shower took THMs to non-detect and the Aquasana cut them 73%; many others left them unchanged, and several filtered samples showed more. Copper-zinc, sulfite and vitamin C stop chlorine but don't remove THMs that have already formed. That matters because a 10-minute shower raised blood THMs more than drinking the same water.
How often should I replace a shower filter?
At the certified gallons or the maker's time limit, whichever comes first; CDC says to follow the maker's schedule. The average American uses about 11 gallons a day in the shower, roughly 4,050 gallons a year, so a family of four empties a 10,000-gallon cartridge in about 7 months. Removal fades with use: in one maker-commissioned test of a copper-zinc head, single filters went from 92% and 100% at 4,000 gallons to 54% and 60% at 8,000, twice the life its maker recommends.
Can a shower filter add metals to the water?
Yes. In an independent lab, zinc or copper rose after every copper-zinc (KDF) filter with a metals panel: zinc reached 3.7 ppm after the Aquasana AQ-4100 (above the lab's 2 ppm guideline) and 0.42 ppm after the Jolie, and lead rose 404% after the Canopy (the cause isn't clear). The carbon-fiber Filterbaby Pro Series showed no metal rising meaningfully. The tester notes zinc isn't known to have health effects in shower water, but a filter shouldn't add metals.
Is the Jolie shower filter worth it?
It's certified now, but it did less than its marketing suggests. NSF's listing shows 2,400 (in the column labeled flow; it can only be the capacity), while Jolie's own report cites 10,000 gallons. In an independent test it cut chlorine 54%, left THMs unchanged and raised zinc to 0.42 ppm. A proposed class action alleges its chlorine claims are false (allegations; no ruling found). At $169 plus about $185 a year in filters, it scores 4.7/10; the Weddell Duo and AquaTru Shower did more in testing.
Shower filter or whole-house filter?
A shower filter is a low-cost fix for free chlorine at one showerhead. A whole-house system treats every tap and shower, can be sized for chloramine with enough contact time, and can be certified for chloroform, but it costs far more and still doesn't replace a drinking-water filter. See our whole-house and reverse osmosis rankings.
References
Update history
Sept. 28, 2026: First published. Scores built from Water Filter Guru's on-site colorimeter and Tap Score lab results, NSF, IAPMO and WQA listings checked Sept. 27–28, 2026, maker test reports and prices on brands' U.S. stores.
Certifier database NSF listings, NSF/ANSI 177 shower filters (current as of Sept. 28, 2026): 7 companies, 11 products, every claim “Free Available Chlorine Reduction.” Weddell Duo (WD-100), replacement WD-100F, 10,000 gal at 2.0 gpm. The Jolie Filtered Showerhead: the service-cycle (gallons) column reads 1.4 and the flow-rate (gpm) column reads 2400; a 2,400 gpm flow is impossible, so 2,400 can only be the capacity. Open source
Certifier database IAPMO R&T product listing directory, NSF/ANSI 177 (checked Sept. 28, 2026): 14 listing files from 12 companies, all for free chlorine. Open source
Certifier database WQA Gold Seal directory, NSF/ANSI 177 (checked Sept. 28, 2026): 2 companies, 5 models (Multipure International dba Rainshower; Xiamen EASO), free chlorine only. Open source
Certifier database IAPMO R&T listing W-30733, NSF/ANSI 177-2023: AquaTru ATSH01–ATSH04, replacement ATSH01-F, 2,000 gal at 1.55 gpm, free chlorine; effective June 11, 2026, to June 30, 2031. Open source
Certifier database IAPMO R&T listing W-9269, NSF/ANSI 177-2023: Sprite Industries. SL2-XX-R (SLC cartridge) 10,000 gal at 2.5 gpm; HO2-XX-R (HOC) 25,000 gal at 2.5 gpm; AGE-XX-Y (SLC) 10,000 gal at 1.75 gpm; effective Sept. 30, 2024, to Sept. 30, 2029. Open source
Certifier database IAPMO R&T listing WP-10971: T3 Micro 73311 (replacement 73305), 10,000 gal at 1.75 gpm, chlorine; listed under Sprite's file W-9269 as main listing AGE-XX-Y; to Sept. 30, 2029. Open source
Certifier database IAPMO R&T listing WP-12222: Culligan WSH-C125 and HSH-C135 (WHR-140), 10,000 gal at 1.8 gpm, free chlorine; to Aug. 30, 2031. No IAPMO certificate lists the ISH-100. Open source
Certifier database IAPMO R&T listing W-12462: Kohler K-22321-XX (K-22322), 8,000 gal at 3 gpm, free chlorine; June 30, 2025, to June 30, 2030. Open source
Certifier database NSF listing, KDF Fluid Treatment: KDF 55 process media under NSF/ANSI 42 as “COMPONENTS: Media, Redox,” certified for a maximum use level of 250 g/L; no contaminant-reduction claim (checked Sept. 28, 2026). Open source
Independent tester Water Filter Guru (Brian Campbell; Amazon Associate). Best shower head filters of 2026 (updated Sept. 7, 2026): real showers on Colorado city water; on-site colorimeter for chlorine; Tap Score lab kits for THMs and hardness; one sample per product. 13 filters tested; only the Weddell Duo and AquaTru Shower cut THMs below its most conservative guideline; none reduced hardness; Canopy 2.7 → 0.06 ppm chlorine, total THMs +158%. Open source
Independent tester Water Filter Guru (Brian Campbell; Amazon Associate). Weddell Duo review (updated July 13, 2026): chlorine 1.68 → 0 ppm (handheld colorimeter); 4 byproducts to 0 (3 THMs totaling 8.83 ppb, plus bromochloromethane); 1.42 gpm; does not reduce chloramine; the tester notes KDF and calcium sulfite “perform better at higher temperatures.” Open source
Independent tester Water Filter Guru (Brian Campbell; Amazon Associate). Afina shower head review (updated June 4, 2026): chlorine 1.68 → 0.02 ppm; bromoform 8.24 → 14.7, bromodichloromethane 2.12 → 3.38, dibromochloromethane 4.67 → 9.67 ppb; 1.85 gpm; KDF-55, carbon, calcium sulfite. Open source
Independent tester Water Filter Guru (Brian Campbell; Amazon Associate). Filterbaby Pro shower filter review (updated Sept. 11, 2026): chlorine 1.68 → 0.23 ppm; total THMs 15.03 → 32.42 ppb; full metals panel, copper 0.274 → 0.0465 ppm, chromium 0.00368 → 0.00385 ppm (+4.6%); 1.63 gpm; sediment + activated carbon fiber. Open source
Independent tester Water Filter Guru (Brian Campbell; Amazon Associate). Canopy shower filter review (updated July 22, 2026): chlorine reading 97% lower (body text prints 0.6 ppm); lead +404%, zinc +8,797%, copper +32%; tested with cold water; the tester says skin doesn't absorb lead; 2.33 gpm; 3,000-gallon cartridge. Open source
Independent tester Water Filter Guru (Brian Campbell; Amazon Associate). AquaTru Shower review (updated Apr. 21, 2026): chlorine 1.68 → 0.94 ppm; total THMs 15.03 → 0 ppb; copper 0.274 → 0.341 ppm; 1.63 gpm; manual says 1,300 gal. Open source
Independent tester Water Filter Guru (Brian Campbell; Amazon Associate). Aquasana shower filter review (updated Apr. 28, 2026): chlorine 2.70 → 1.14 ppm; total THMs −73%; zinc +40,924% to 3.7 ppm (Tap Score guideline 2 ppm); copper +58%; tested with cold water; 1.54 gpm. Open source
Independent tester Water Filter Guru (Brian Campbell; Amazon Associate). Hello Klean shower filter review (updated June 11, 2026): chlorine 2.70 → 1.23 ppm; chloroform −8%, bromochloromethane −36%, bromodichloromethane +23%, dibromochloromethane +47%; about 3,400 gal per cartridge; 1.58 gpm. Open source
Independent tester Water Filter Guru (Brian Campbell; Amazon Associate). Jolie shower filter review (updated Aug. 20, 2026): chlorine 2.70 → 1.23 ppm (colorimeter; the method paragraph also mentions a test strip); no change in THMs; zinc 0.00919 → 0.42455 ppm (“Zinc isn't known to have health effects in shower water”); tested with cold water; 2.20 gpm; still lists “Certifications: None.” Open source
Independent tester Water Filter Guru (Brian Campbell; Amazon Associate). Sprite Slim-Line 2 review (updated Apr. 28, 2026): chlorine 2.70 → 1.54 ppm; “Both of our tests were conducted with cold water”; temperature, pressure and water differences may explain part of the gap with the certifying lab; THMs down 1–7%; zinc +13,500%; about 1.6 gpm. Open source
Independent tester Water Filter Guru (Brian Campbell; Amazon Associate). AquaBliss SF100 review (updated May 11, 2026): chlorine 2.70 → 1.88 ppm; total THMs 8.83 → 8.31 ppb; zinc 0.00919 → 0.30582 ppm; lead −72%; copper −68%. Open source
Independent tester Water Filter Guru (Brian Campbell; Amazon Associate). eskiin shower head review (updated Sept. 11, 2026): chlorine 1.68 → 1.79 ppm; bromoform +10%, bromodichloromethane +25%, dibromochloromethane +43%; KDF-55, carbon, vitamin C. Open source
Independent tester Water Filter Guru (Brian Campbell; Amazon Associate). Hammerhead shower filter review (updated Aug. 14, 2026): chlorine 1.68 → 0.77 ppm; bromoform +51%, bromodichloromethane +32%, dibromochloromethane +47%; KDF-55 + calcium sulfite; cartridge rated 10,000 gallons or 6–12 months; limited lifetime warranty; $99.95 at review. Open source
Independent tester Quality Water Lab. Shower head filter rankings: chlorine judged by test strip; its Weddell and Jolie tables show identical THM results and the page carries an AI-tool citation artifact, so we don't use it as evidence. Open source
Maker's data Weddell Water. Weddell Duo page ($89.99; “the only shower filter certified by NSF to reduce Free Available Chlorine”; “99% Chlorine Reduction – Certified by NSF in 2023”; PFAS and particulates “Verified by IAPMO Lab”; “up to 10,000 gallons” and “up to 8,000 gallons”; change every 5–6 months) (checked Sept. 28, 2026). Open source
Maker's data Weddell Water. Test reports page: NSF/ANSI 177 data (≥87% minimum; 93.3% at 10,000 gallons, labeled 100% capacity; 95.5% at 8,000); certified by NSF in 2023 and “recertified in 2026”; PFAS test to an NSF/ANSI 53 protocol and particulates to NSF/ANSI 42 by IAPMO R&T's lab (checked Sept. 28, 2026). Open source
Maker's data Weddell Water. Replacement cartridges (sediment + carbon “1+1” set $29.99) (Sept. 27, 2026). Open source
Maker's data Afina. Filtered Shower Head page ($129 sale, compare-at $179; “Filter lasts 2 months”) (Sept. 28, 2026). Open source
Maker's data Afina. Replacement filter two-pack ($58 sale, compare-at $80; says both “replacing your filter every three months” and “Filter needs to be replaced every 2 months”) (Sept. 28, 2026). Open source
Maker's data Filterbaby. Pro Series Titanium Aluminum Shower Filter ($139; “3rd-Party Tested To Exceed NSF 177 Standards”) (Sept. 28, 2026). Open source
Maker's data Filterbaby. Pro shower filter replacement ($49) (Sept. 28, 2026). Open source
Maker's data Filterbaby. Get Filterbaby Pro Series Titanium Aluminum Shower Filter ($139; “IAPMO certified to NSF 177 Standards – the gold standard in filtration”; the same line appears on two other Filterbaby listings of this filter) (Sept. 28, 2026). Open source
Maker's data Canopy. Filtered Showerhead page ($150; filter subscription $135, then $25 every 90 days; filter-and-aroma plan $125, then $40 every 90 days; “Tested to ANSI/NSF-177 standards”; says its media ingredients “have been shown to help reduce” chloramine among others; “Filter is not independently tested for all contaminants”) (Sept. 28, 2026). Open source
Maker's data Canopy. Showerhead filter ($37; $27 on subscription) (Sept. 27, 2026). Open source
Maker's data AquaTru. AquaTru Shower page ($149; KDF, calcium sulfite and catalytic carbon; “consistent chlorine & chloramine filtration”) (Sept. 28, 2026). Open source
Maker's data AquaTru. Replacement shower filter ($39.95; replace every 90 days) (Sept. 28, 2026). Open source
Maker's data AquaTru. Replacement Shower Filter 3 Pack ($110; “Four-stage filtration certified to reduce chlorine, chloramines, and common tap impurities”) (Sept. 28, 2026). Open source
Maker's data Aquasana. Shower filter without shower head ($74.99 sale, MSRP $119.99; with head $79.99 sale, MSRP $139.99; wands $84.99–$89.99 sale; “Independently tested to NSF/ANSI Standard 177 to reduce over 90% of chlorine for 10,000 gallons or up to 6 months”; the page's contaminant list reads “Our patented Claryum® technology reduces 78 contaminants,” including chloramines; “1-Year Limited Warranty and a 90-Day Satisfaction Guarantee”) (Sept. 28, 2026). Open source
Maker's data Aquasana. AQ-4100/4105 performance data sheet: tested to NSF/ANSI 177 by Pace Analytical (commissioned by Aquasana), 1.95 mg/L free chlorine, 2.5 gpm, >91.61% overall, 81.05% at 9,000 gal; 10,000-gal capacity. Open source
Maker's data Aquasana. Water filter replacements: shower filter replacement cartridge ($62.99; $53.54 with Water for Life) (Sept. 28, 2026). Open source
Maker's data Hello Klean. Shower Filter page ($55; “reduces chlorine, heavy metals, rust and odour”) (Sept. 28, 2026). Open source
Maker's data Hello Klean. Refill capsule ($40; “Replace every 3–4 months to remove over 90% of chlorine, heavy metals, and impurities”) (Sept. 28, 2026). Open source
Maker's data Jolie. Filtered Showerhead page ($169; $148 with subscription; “The only clinically proven shower filter, backed by 6 independent third-party studies”; “filters chlorine, heavy metals, bacteria, and scale”) (Sept. 28, 2026). Open source
Maker's data Jolie. Replacement filter ($38; KDF-55 and calcium sulfite) (Sept. 28, 2026). Open source
Maker's data Jolie. Product Test Reports (2025), all commissioned by Jolie: chlorine test at Kymera Labs, Oct. 2024, 2.0 mg/L at 41 °C and 80 psi, “over 66% of free chlorine through 10,000 gallons”; a 4-week, 32-person skin study (corneometer, vapometer, pH meter, expert grading; no comparison group); a 12-week, 27-person hair-shedding study; three lab tests on hair samples (color, porosity, frizz). (copy on file with DrAxe.com)
Maker's data Sprite. Slim-Line 2 page ($29.95–$69.95; “Certified to NSF/ANSI Standard No.177”; SLC cartridge rated 6 months or 10,000 gallons) (Sept. 28, 2026). Open source
Maker's data Sprite. High Output 2 page ($39.95–$79.95; HOC cartridge rated 12 months or 25,000 gallons) (Sept. 28, 2026). Open source
Maker's data Sprite. Replacement cartridges (SLC $19.95, 6 months; HOC $29.95, 12 months) (Sept. 27, 2026). Open source
Maker's data Sprite. Home page: Chlorgon media removes “Free Chlorine (Cl-)” and “Combined Chlorine (Sodium Hypochlorite).” Open source
Maker's data T3. Source Showerhead page ($199.99; “a mixture of calcium sulfide, zinc, and copper”; 7 spray settings) (Sept. 28, 2026). Open source
Maker's data T3. Source showerhead replacement filter ($29.99) (Sept. 28, 2026). Open source
Maker's data Kohler. Aquifer K-22321 and K-22322 specification sheets (June 2024): KDF 55 process media; “up to 8,000 gallons” or six months; 4.0 gpm maximum flow at 60 psi; NSF/ANSI 177. (copy on file with DrAxe.com)
Maker's data Ferguson Home. Kohler K-22321 Aquifer shower head water filter listing; also listed at Lowe's (found Sept. 28, 2026; the pages blocked automated price checks). Open source
Maker's data Culligan filter store. WSH-C125 wall-mount filtered showerhead ($59.99 on Sept. 27, 2026; the store's domain redirected to a parked page on Sept. 28). (copy on file with DrAxe.com)
Maker's data Culligan filter store. WHR-140 replacement cartridge ($17.99, out of stock; “Use with Culligan ISH-100, ISH-200, ISH-200c, WSH-C125, HSH-C135 and RDSH-C115 / IAPMO R & T Tested and Certified”; 10,000 gallons or 6 months) (Sept. 27, 2026). (copy on file with DrAxe.com)
Maker's data The Home Depot. Culligan Showerhead Water Filter System with Massage Feature, WSH-C125 (listing found Sept. 28, 2026; price varies). Open source
Maker's data Walmart. Culligan WSH-C125 filtered wall-mount showerhead listings (found Sept. 28, 2026; price varies by seller). Open source
Maker's data Amazon. Culligan WSH-C125 wall-mounted filtered shower head, and Culligan's WHR-140 replacement cartridge (listings found Sept. 28, 2026; price varies). Open source
Maker's data HammerHead Showers (official store). Shower Head Filter, inline ($109.95 in chrome on sale, compare-at $139.95; other finishes $119.95–$129.95; “a proprietary blend of KDF 55 and Calcium Sulfite”; “3rd party tested to effectively reduce chlorine and heavy metals”) (Sept. 28, 2026). Open source
Maker's data HammerHead Showers (official store). Shower filter cartridge replacement ($37.95 on sale, compare-at $44.95) (Sept. 28, 2026). Open source
Maker's data AquaBliss. SF100 page ($35.99; vitamin C, minerals and tourmaline “infusion”) and SFC100 cartridge ($17.99; replace every 3–6 months) (Sept. 28, 2026). Open source
Maker's data eskiin. Filtered Showerhead page ($149) and replacement filter ($36) (Sept. 28, 2026). Open source
Maker's data Rorra. Filtered Showerhead page ($239 one-time; $199 with filter subscription; KDF-55 + calcium sulfite; “91% … Across 4,000 gallons · NSF-177”) (Sept. 28, 2026). Open source
Maker's data Rorra. Rigorously tested page: chlorine test “conducted to 8,000 gallons of use, however we recommend replacing the filter every 90 days (~4,000 gallons of use)”; “Testing Labs: Kymera (WQA)”; structural-integrity test at IAPMO's lab, Feb. 2025; “Products are not yet formally certified or listed by the NSF as we are in the process of obtaining those formal certifications” (Sept. 28, 2026). Open source
Maker's data Kymera (KDF Fluid Treatment; the report calls it a WQA satellite lab) report for Rorra, dated Oct. 6, 2025: NSF/ANSI 177 protocol, cumulative average 90.93% at 4,000 gal (single filters 100% and 91.77%) and 80.31% at 8,000 gal (single filters 59.57% and 53.94%). Open source
Maker's data Sonaki. Tornado Vita C Filtered Showerhead ($127.99 sale, compare-at $147.99; “99% of Chlorine & Chloramines”) (Sept. 28, 2026). Open source
Maker's data Voesh. Vitamin C Shower Filter ($29; “Clinically tested to help remove up to 99% of chlorine, heavy metals, rust, calcium buildup, and microplastics”) (Sept. 28, 2026). Open source
Maker's data AquaYouth. 2.0 Carbon Shower Filter ($59.99 sale, compare-at $89.99) and replacement filter page: “the only shower filter on the market that is NSF/ANSI 177 certified” (Sept. 28, 2026). Open source
Maker's data AquaHomeGroup. 20-Stage Shower Filter with Vitamin C & E ($29.95; “helps to reduce chlorine, chloramine, heavy metals”) (Sept. 28, 2026). Open source
Maker's data Kind. Kind Showerhead ($99.99 sale, compare-at $165; KDF-55, amino acid granules, activated carbon) (Sept. 28, 2026). Open source
Maker's data Crystal Quest. Shower Filter ($44.95 with head, $40.95 without; compare-at $29.50; claims chloramines, VOCs, THMs, heavy metals) (Sept. 28, 2026). Open source
Maker's data KDF Fluid Treatment (Kymera International). Products page: KDF 55 reduces chlorine “up to 99%” and “is certified by NSF to NSF/ANSI Standard 42”; site footer: “Tested and Certified by NSF … for material requirements only”; no chloramine claim. Open source
Public record / study Andrew R (NSF). A new standard for shower filters. Water Conditioning & Purification, Dec. 15, 2004: NSF/ANSI 177 challenges filters with 2.0 mg/L free chlorine at 40 °C and 80 psi, requires at least 50% reduction throughout rated life, keeps chloramines below 0.1 mg/L because they “can interfere” with common media, and requires a label saying performance with chloramines hasn't been evaluated. Open source
Public record / study Plumbing & Mechanical. NSF/ANSI Standard 177: a level playing field for shower filter claims (June 1, 2005): required wording, “This system has not been evaluated for free available chlorine reduction performance in the presence of chloramines.” Open source
Public record / study EPA. Chloramines in drinking water: “More than one in five Americans uses drinking water treated with chloramines” (updated Mar. 12, 2026). Open source
Public record / study EPA. National Primary Drinking Water Regulations: chlorine and chloramine maximum residual 4.0 mg/L; total trihalomethanes 0.080 mg/L. Open source
Public record / study EPA. CCR information for consumers: community water systems must send an annual drinking water quality report (Consumer Confidence Report) by July 1; call your supplier or use EPA's CCR search tool. Open source
Public record / study EPA WaterSense. Showerheads: standard showerheads use 2.5 gpm; WaterSense-labeled models no more than 2.0 gpm. Open source
Public record / study EPA. A brief guide to mold, moisture and your home: “Run the bathroom fan or open the window when showering.” Open source
Public record / study CDC. Preventing waterborne germs at home (Mar. 2024): clean showerheads when you see buildup, soaking heads and hoses in white vinegar; “Maintain and replace all water filters according to the manufacturer's instructions, including … showerhead and faucet filters”; flush fixtures unused for a week or more. Open source
Public record / study Alliance for Water Efficiency, Home Water Works. Showers: 11.1 gallons per person per day; the average shower lasts 7.8 minutes and uses about 15.8 gallons at 2.1 gpm (from the Residential End Uses of Water study, 2016). Open source
Public record / study San Francisco Public Utilities Commission. Chlorine and chloramine removal Q&A (Mar. 2015): the water industry dechlorinates with “sulfite compounds, hydrogen peroxide and ascorbic acid,” and uses GAC filters; 1,000 mg of vitamin C removed chloramine completely in a medium bathtub; “Some shower attachments with Vitamin C marketed on the Internet are effective in removing chloramine; however, the claims … as to their replacement frequency appear to overestimate the duration”; no NSF-certified vitamin C devices; dialysis practice uses 10 minutes of carbon contact. Open source
Public record / study Land B. Using vitamin C to neutralize chlorine in water systems. USDA Forest Service Tech Tip 0523 1301 (2005): “One gram of ascorbic acid will neutralize 1 milligram per liter of chlorine per 100 gallons of water. The reaction is very fast.” Open source
Public record / study Li X, et al. A review of traditional and emerging residual chlorine quenchers on disinfection by-products. Toxics, 2023: ascorbic acid consumes chlorine within about a minute but leaves THMs in place. Open source
Public record / study DiLoreto S, et al. Environ Sci Technol, 2026 (8 U.S. utilities, 152 samples): free chlorine 0.669–1.62 mg/L in chlorinated distribution systems; total chlorine 1.85–3.47 mg/L in chloraminated systems. Open source
Public record / study Nuckols JR, et al. Influence of tap water quality and household water use activities on indoor air and internal dose levels of trihalomethanes. Environ Health Perspect, 2005 (7 adults, 2 homes): showering and bathing gave “at least 2-fold increases” in median blood and breath THMs; average blood rise from showering 358 and 79 pg/mL; a cold tap-water drink didn't meet the 2-fold criterion. Open source
Public record / study Backer LC, et al. Household exposures to drinking water disinfection by-products: whole blood trihalomethane levels (31 adults). J Expo Anal Environ Epidemiol, 2000. Open source
Public record / study Lynberg M, et al. Assessing exposure to disinfection by-products in women of reproductive age living in Corpus Christi, Texas, and Cobb County, Georgia (50 women; blood before and after showering). Environ Health Perspect, 2001. Open source
Public record / study Gordon SM, et al. Effect of water temperature on dermal exposure to chloroform. Environ Health Perspect, 1998 (10 bathers breathing clean air; 7 compared at 30–40 °C): “about 30 times more chloroform” exhaled at the highest temperatures. Open source
Public record / study Weisel CP, Chen WJ. Exposure to chlorination by-products from hot water uses. Risk Anal, 1994: THM exposures calculated with heated-water levels were 50% higher than with cold-water levels. Open source
Public record / study Kerger BD, et al. Assessment of airborne exposure to trihalomethanes from tap water in residential showers and baths. Risk Anal, 2000: real-home exposures “about 30% lower” than lab-chamber studies, likely because of greater air exchange. Open source
Public record / study Villanueva CM, et al. Bladder cancer and exposure to water disinfection by-products through ingestion, bathing, showering, and swimming in pools (1,219 cases, 1,271 controls). Am J Epidemiol, 2007: OR 1.83 (95% CI 1.17–2.87) for shower or bath time weighted by home THM level, top vs bottom quartile. Open source
Public record / study Thomas KS, et al. A randomised controlled trial of ion-exchange water softeners for the treatment of eczema in children (SWET; 336 children). PLoS Med, 2011: 20% vs 22% improvement; “no additional benefit to usual care.” Open source
Public record / study Jabbar-Lopez ZK, et al. The effect of water hardness on atopic eczema: systematic review and meta-analysis. Clin Exp Allergy, 2021: OR 1.28 (1.09–1.50) in 7 studies of 385,901 people; GRADE certainty very low. Open source
Public record / study Danby SG, et al. The effect of water hardness on surfactant deposition after washing and subsequent skin irritation in atopic dermatitis. J Invest Dermatol, 2018 (80 people): hard water left more detergent on skin; “A clear effect of chlorine was not observed.” Open source
Public record / study Seki T, et al. Free residual chlorine in bathing water reduces the water-holding capacity of the stratum corneum in atopic skin. J Dermatol, 2003 (20 eczema patients, 10 controls): lower at 0.5 mg/L or more in eczema skin; in healthy skin only at 2 mg/L. Open source
Public record / study Cedirian S, et al. The exposome impact on hair health, part I. An Bras Dermatol, 2025: chlorinated (pool) water can weather hair; green hair is mostly from copper. Open source
Public record / study Gebert MJ, et al. Ecological analyses of mycobacteria in showerhead biofilms. mBio, 2018 (656 households): mycobacteria the most abundant genus; more than twice as abundant in U.S. homes on municipal water as on wells. Open source
Public record / study Pitell S, Haig SJ. Assessing the impact of anti-microbial showerheads on opportunistic pathogens. Front Microbiomes, 2023 (84 days, triplicate heads): a zinc-copper-calcium filter head performed like a plain head (p > 0.05). Open source
Public record / study Norton GJ, et al. Physical measures to reduce exposure to tap water-associated nontuberculous mycobacteria. Front Public Health, 2020: a granular activated carbon filter “failed to significantly reduce” M. abscessus and M. avium. Open source
Public record / study ClassAction.org. Rusow et al. v. Jolie Skin Company, Inc., No. 3:26-cv-02411 (U.S. District Court, Northern District of California), filed Mar. 19, 2026 (published Apr. 9, 2026): California and New York plaintiffs allege Jolie's “removes chlorine” claims are false because its filters reduce chlorine by roughly 66%, per Jolie's own testing. Allegations only. Open source
Public record / study Truth in Advertising (TINA.org). Ad Alert: Jolie filtered showerhead (May 27, 2025): a “risk-free” 60-day trial charged the full $152 unless the showerhead came back within 10 days (Jolie says returns within 60 days get a full refund); Jolie didn't provide substantiation for its chlorine and heavy-metal claims. Open source
DA
Dr. Josh Axe, DNM, DC, CNS
Founder, DrAxe.com
Dr. Axe is a doctor of natural medicine, chiropractor and clinical nutritionist with more than 20 years in functional medicine, and the founder of DrAxe.com.
How we make money: We may earn a commission when you buy through links on this page. It never changes our rankings: products are scored before any affiliate terms are discussed, brands can't pay for placement, and we recommend products whether or not they have an affiliate program. Scores are editorial assessments based on certifier databases, independent tests and maker data, not our own lab testing.
