How to check a water filter certification

certifier source: NSF's drinking water treatment unit database returned no listings for company name APEC or trade name ROES-50.

This rules out NSF certification, not certification by another body. WQA's product directory blocked access, and IAPMO's directory couldn't be searched, so any WQA or IAPMO listing and its scope are unconfirmed.

manufacturer source: APEC's product page shows a WQA logo, calls the ROES-50 WQA certified and says it was tested for TDS reduction.

No certificate number, standard or listing link is given. APEC's FAQ names its Ultimate line as WQA certified and doesn't mention the ROES-50. The owner's manual doesn't mention WQA or NSF/ANSI 58.

manufacturer source: Aquasana's performance data sheet for the AQ-6300M says WQA tested and certified it to NSF/ANSI 42, 53 and 401. Under 42, it reports 97.3% chlorine and 91% chloramine reduction. Under 53, lead fell 99.6% at pH 8.5 and over 99.7% at pH 6.5. PFOA/PFOS fell 99.7%, and cysts fell 99.995%. Mercury fell 95.4% to over 96.2%. MTBE fell 85.5%, and the VOC surrogate fell 99.3%. Under 401, microplastics fell 99.6%. The 15 trace drugs and chemicals tested fell 92.3% to over 98.4%.

Aquasana publishes these results from testing under standard lab conditions and says actual performance may vary. Dozens of VOCs are covered by a chloroform surrogate test rather than tested one by one. The sheet has no date or revision. It doesn't mention arsenic, fluoride, nitrate, TDS, bacteria or viruses.

manufacturer source: The product and replacement-filter pages say Aquasana's filters are WQA tested and certified to NSF/ANSI 42, 53 (including P473) and 401.

WQA's product database blocked automated access on Oct 13, 2026, so the listing and its contaminant scope weren't confirmed with the certifier. The data sheet lists PFOA/PFOS under NSF/ANSI 53 but doesn't mention P473.

certifier source: NSF's drinking-water treatment database lists only two Aquasana products, both whole-house UV systems certified to NSF/ANSI 55. The AQ-6300M and its AQ-C3M-R cartridges don't appear.

Expected, since Aquasana names WQA rather than NSF as the certifier. It means there's no NSF listing to check the contaminant claims against.

manufacturer source: Aquasana's WH-1000 performance data sheet says the system was independently tested to NSF/ANSI 42. It reports more than 97.4% overall reduction of free available chlorine from a 2.02 mg/L (±10%) challenge, against a 50% minimum. In its sample table, chlorine in the filtered water was non-detect through about 500,000 gallons. At 960,000 and 1,000,000 gallons, the table shows 0.15 mg/L (91.94% and 92.82% reduction). It lists a 23 psi pressure drop for the test, and every sample row records 60 psi dynamic pressure. The sheet gives rated capacity as 1,000,000 gallons and rated flow as 7.0 GPM.

This is manufacturer-reported testing. The sheet doesn't name the lab or the test flow rate, and it adds that "actual performance may vary." It also says "Not certified for contaminant reductions by WQA" and "All contaminants reduced by this filter are listed". Free chlorine is the only contaminant it lists. The product page describes the system as independently tested to remove up to 97% of chlorine, not as certified.

manufacturer source: Aquasana says the Rhino tank is WQA certified to NSF/ANSI/CAN 61, for materials safety only. The data sheet adds CSA B483.1 for materials safety and structural integrity.

From Aquasana's product page and data sheet, not cross-checked against WQA's listing. A materials certification covers what the tank's materials may add to water, not how much the system removes.

independent source: A third-party filter database reports active IAPMO R&T listings for model AT100, also covering AT110 to AT140, under NSF/ANSI 42, 53, 58 and 401 as of Aug 30, 2026. IAPMO's certificate pages wouldn't load for this review, and its directory showed no search or listings when fetched.

The database gives IAPMO certificate numbers 18728 (42), 18729 (53), 18730 (58) and 18731 (401). It doesn't mention NSF/ANSI 372. Treat it as a pointer to IAPMO, not a substitute for the listing.

certifier source: NSF's drinking water treatment directory returns "No Matching Products Found" for the trade name AquaTru. The same third-party database found no WQA listing either.

AquaTru names IAPMO R&T as its certifier, not NSF or WQA, so the gap is expected. WQA's directory wasn't searched directly.

manufacturer source: AquaTru's Carafe data sheet (rev. 09.25.R5, models AT100 to AT140) names IAPMO R&T as the certifier under NSF/ANSI 42, 53, 58, 372 and 401. Under NSF/ANSI 58, it cut lead from a 0.15 mg/L challenge by 98% minimum and 99.2% on average, against a 0.005 mg/L maximum.

Other NSF/ANSI 58 minimum reductions: pentavalent arsenic 97.2%, fluoride 94.2%, hexavalent chromium 90.1%, nitrate 97.5%, perchlorate 97.2%, radium 226/228 88% and cysts 99.9%. Three rows (nitrite, nitrate plus nitrite and TDS) list a minimum above the average, which can't both be right. These are lab results at the standard's challenge levels, not measurements of your water.

manufacturer source: Under NSF/ANSI 401, the sheet lists 15 emerging compounds, including ibuprofen (97.4%), bisphenol A (99.5%) and DEET (93.3%). Microplastics of 0.5 to under 1 µm fell 98.96%. Under NSF/ANSI 42, chlorine fell 96.8% and chloramine 97.01%.

Average reductions at the standard's challenge levels, in ng/L for the 401 compounds.

manufacturer source: AquaTru's FAQ says the Carafe has passed IAPMO testing for 78 contaminants, with 5 still in testing, and that its certification is pending. The product page says it's certified for 84 contaminants, and the data sheet names IAPMO R&T as the certifier.

The FAQ looks out of date, but it's still published on AquaTru's site.

certifier source: AquaTru's FAQ says its Classic countertop and Under Sink models are certified by IAPMO, and that AquaTru is listed on IAPMO's site under AquaTru LLC. IAPMO's directory page showed no search or listings when fetched, so the listing wasn't confirmed.

The listing's scope, model numbers and status are unverified. The test results here come from AquaTru's own copy of the data sheet.

manufacturer source: AquaTru's performance data sheet names IAPMO R&T as the certifier under NSF/ANSI 42, 53, 58, 372 and 401. Under NSF/ANSI 58, it cut lead from a 0.15 mg/L challenge by 97.5% minimum and 99.1% on average, against a 0.010 mg/L maximum.

Other NSF/ANSI 58 minimum reductions: pentavalent arsenic 95.8%, fluoride 91.8%, hexavalent chromium 94.3%, nitrate plus nitrite 70.0%, perchlorate 95.0%, TDS 75.7% and cysts 99.95%. The sheet says to rely on the arsenic result only with free chlorine at the inlet, and that chloramine isn't enough. These are lab results at the standard's challenge levels, not measurements of your water.

manufacturer source: For PFOA and PFOS under NSF/ANSI 53, the sheet lists a 1.5 µg/L challenge, a 0.02 µg/L maximum in the product water and a 97.5% minimum reduction. Under the same standard it lists dozens of VOCs, pesticides and trihalomethanes.

The sheet doesn't list other PFAS separately. AquaTru's FAQ says the countertop models are certified for 84 contaminants in total.

manufacturer source: Under NSF/ANSI 401, the sheet lists 15 emerging compounds, including ibuprofen (95.1%), bisphenol A (99.0%) and DEET (93.3%). Microplastics of 0.5 to under 1 µm fell 96.48%. Under NSF/ANSI 42, chlorine fell 97% and chloramine 96%.

Average reductions at the standard's challenge levels, in ng/L for the 401 compounds.

certifier source: NSF's drinking water database lists the OB06 filter, which Brita calls the Elite, for lead reduction under NSF/ANSI 53 in just two pitchers. Those are the Tidal (OB63) and Pacifica (OB41). A search for the Ultramax model number, OB24, returns "No Matching Products Found".

So NSF hasn't certified the Ultramax itself. The NSF listings give a 120-gallon service cycle and claim lead reduction only. NSF says its listings were current on Oct 13, 2026.

manufacturer source: Brita's data sheet says IAPMO R&T certifies the Elite filter (OB06) for lead under NSF/ANSI 53 in nine Brita systems. They include the Ultramax Jet Black (OB24). It also says WQA certifies the filter under NSF/ANSI 42, 53 and 401 for the claims on the sheet.

These are Brita's conformance statements. IAPMO's and WQA's directories couldn't be opened for this review, so the listings weren't confirmed at the source.

independent source: A third-party filter database reports an IAPMO R&T lead listing under NSF/ANSI 53, file W-13905. It's scoped to the Ultramax Jet Black OB24 with the Elite OB06. It also reports WQA listings under NSF/ANSI 42, 53 and 401 and no NSF listing for OB24, all checked on Aug 30, 2026.

The database says it isn't affiliated with NSF, IAPMO or WQA and that its own verification step hasn't run. Its WQA entries mix the Original and Elite filters. Its Elite page files the IAPMO listing under PFOA and PFOS, not lead. Treat it as a pointer to the certifiers, not a substitute.

manufacturer source: Brita Canada's French-language data sheet for the Elite filter lists PFOA and PFOS under NSF/ANSI 53, certified by IAPMO R&T. The listed systems include the Ultramax (OB24). It shows a 98.1% reduction from a 1.5 ppb challenge.

The PFOA and PFOS rows share one set of figures. Brita's US data sheet and product page make no PFAS claim. It's unclear whether filters sold in the US carry this certification.

regulator source: EPA's consumer tool points to filters that an accredited third party has certified to cut lead to 5 ppb or less. They must also show Class I particulate reduction, with certification against both NSF/ANSI 53 and 42.

Brita's data sheet claims both for this model: lead under a 5 ppb limit and Class I particulates down 99.6%. Brita says IAPMO certifies the lead claim and WQA certifies claims under both standards.

certifier source: NSF's database lists the Filtered Water Pitcher and its Pitcher Replacement Filter under NSF/ANSI 42. The listed claims are chlorine reduction and taste and odor reduction, with a 100-gallon service cycle. A footnote adds NSF/ANSI/CAN 372, which covers the lead content of the materials.

No NSF/ANSI 53, 58, 401 or 473 listing appears, so the lead, PFAS, fluoride and microplastics results aren't NSF-certified. NSF says the listing was current on Oct 13, 2026.

manufacturer source: iSpring says the RO500AK-BN is certified to NSF/ANSI 58 for TDS reduction, and that the certification covers the entire system rather than individual components. The product page links to an online test report by QR code.

Manufacturer-reported, and NSF's own listing confirms it. NSF/ANSI 58 is the standard for point-of-use reverse osmosis systems. The product page doesn't name the certifier or give the certified reduction figure.

certifier source: NSF's NSF/ANSI 58 listing for iSpring Water Systems LLC includes the RO500AK-BN, made in Fujian, China, with FCA500, FCF500 and MRO500 modules. The listed claim is TDS reduction, at a production rate of 500 gpd. The listing also notes the system meets lead-free plumbing requirements (weighted average lead content of 0.25% or less).

Checked on NSF's site on Oct 13, 2026. The listing gives no TDS reduction percentage and no efficiency figure. It also lists the RO500AK-ORB with the same claim. The lead-free note covers the plumbing materials, not lead reduction in the water.

manufacturer source: iSpring says the WGB32B removes up to 99% of chlorine, plus color, cloudiness, taste, odor, herbicides, THMs and VOCs. It says its carbon blocks were "tested by a third-party to meet NSF/ANSI standards". It also says independent lab testing shows its filters remove more chlorine than other leading brands. The replacement page adds pesticides and industrial chemicals.

These are manufacturer claims. The replacement page says "both" filters were tested by an independent third party to meet NSF/ANSI standards. The pages reviewed give no NSF/ANSI standard number, lab name or test report, and no reduction figure for any contaminant other than chlorine.

manufacturer source: A comparison table on the WGB32B product page lists "NSF/ANSI 58 Certification: Yes (full system certified)" for iSpring.

The same table's other rows describe 75 GPD daily production and RCC7AK alkaline remineralization. Those are reverse osmosis features, so the row doesn't appear to describe this whole-house cartridge system. The product description itself names no standard.

independent source: A third-party filter database reports WQA listings for the LifeStraw Home Glass 7-Cup under NSF/ANSI 42, 53 and 401, checked Aug 30, 2026. Under 42 it lists chlorine, nominal particulate class I, and taste and odor. Under 53 it lists cadmium, copper, cyst, lead, mercury and turbidity. Under 401 it lists microplastics plus atenolol, bisphenol A, carbamazepine, estrone, linuron, meprobamate, nonylphenol, phenytoin and trimethoprim.

WQA's directory blocked automated access, so the listing wasn't opened directly. LifeStraw's data sheet marks the same claims as WQA certified. The database says the listings name the glass 7-cup and don't support extending them to LifeStraw's plastic pitchers or dispenser.

certifier source: NSF's drinking water directory returns "No Matching Products Found" for the trade name LifeStraw and for the company name Vestergaard. The third-party database found no IAPMO R&T listing as of Aug 30, 2026.

IAPMO's directory showed no search or listings when fetched, so the IAPMO result rests on the third-party database.

manufacturer source: LifeStraw's data sheet for the glass 7-cup gives the WQA-certified results. Lead fell from a 0.15 mg/L challenge to at most 1.7 µg/L (98.9%). Cadmium fell 98.9%, copper 96.7% and mercury 82.9%. Cysts fell 99.996%, chlorine at least 97% and microplastics at least 99.0%.

These are results at the standard's challenge levels, not measurements of your tap. The certified capacity is 40 gallons, the carbon filter's life. The lead and mercury reports came from NSF International's lab in 2020, at pH 6.5 and 8.5. Lab testing at NSF isn't the same as an NSF listing.

manufacturer source: The product page says the pitcher is WQA certified to remove 99.999% of microplastics. The data sheet lists the WQA-certified microplastics result as at least 99.0%, against an 85% requirement.

Go by the data sheet's 99.0% for the certified figure.

certifier source: A search of NSF's drinking water treatment unit listings for the company name "springwell" returned "No Matching Products Found".

The search, on Oct 13, 2026, was by company name only. A product certified under a different company name wouldn't appear. WQA and IAPMO listings weren't checked.

certifier source: NSF's drinking water treatment unit database lists no G3P600 and no Waterdrop reverse osmosis system under NSF/ANSI 58.

Checked on Oct 13, 2026. A trade-name search for G3P600 and a Waterdrop search limited to NSF/ANSI 58 both returned "No Matching Products Found." The Waterdrop listings that could be read are refrigerator, faucet-mount, pour-through and plumbed-in filters under NSF/ANSI 42, 53 and 401. So NSF doesn't list the G3P600 under either name. That doesn't rule out a listing with IAPMO R&T or WQA. IAPMO's directory couldn't be searched, and WQA's wasn't checked.

manufacturer source: Waterdrop lists NSF/ANSI 42, 58 and 372 for the G3P600. One product image is labeled as an IAPMO R&T certificate for NSF/ANSI/CAN 372.

NSF/ANSI 372 covers the lead content of parts that touch water, not what the filters remove. The page doesn't name a certifier for NSF/ANSI 42 or 58 or list certified reductions. It doesn't claim NSF/ANSI 53, 401 or 473 for this model.

certifier source: NSF's drinking water treatment unit listings have no G3P800. A trade-name search for G3P800 returned "No Matching Products Found". Waterdrop's listings, under Qingdao Ecopure Filter Co., cover only NSF/ANSI 42, 53 and 401. They're for refrigerator, faucet-mount, pour-through and plumbed-in filters, with no reverse osmosis or NSF/ANSI 58 entries. A Waterdrop search of NSF's drinking water system component listings also returned no matching products.

NSF/ANSI 58 is NSF's standard for reverse osmosis systems. This rules out an NSF listing, not certification by CSA, IAPMO or WQA, whose directories couldn't be checked.

manufacturer source: Waterdrop says the G3P800 meets NSF/ANSI 42, 58 and 372 standards. Its spec and comparison tables list NSF/ANSI 42, 53, 58 and 372. Product image captions describe an NSF/ANSI/CAN 372 certificate and SGS and CSA testing. The G3P800-N2RO membrane page lists "WQA" in its spec table.

The page text gives no certifier, certificate number or certified contaminant list for any of these claims. It doesn't say what the 372 claim covers.

certifier source: NSF's drinking water treatment database lists no WD-10UA or WD-RF10. A trade-name search for 10UA returned "No Matching Products Found". The Waterdrop listings that could be read, from Qingdao Ecopure Filter Co., cover refrigerator, faucet-mount, pour-through and plumbed-in filters under NSF/ANSI 42, 53 and 401, with no UA or RF10 model.

Checked on Oct 13, 2026. This rules out NSF as the certifier, not certification by another body.

manufacturer source: Waterdrop's product page and spec table say the system is certified to NSF/ANSI 42 and 372, for lead-free, BPA-free materials. Waterdrop's NSF page says its filters are tested and certified by NSF International and lists the Direct Connect system under NSF/ANSI 42 and 372.

Neither page names a listing or certificate number, and NSF's own database doesn't list the model. NSF/ANSI 42 covers aesthetic claims such as chlorine, taste and odor, not health contaminants.

independent source: A third-party filter database reports IAPMO R&T listings for the WD-10UA with the WD-RF10 cartridge: file W-11590 under NSF/ANSI 42-2022 and file W-13936 under NSF/ANSI/CAN 372-2022. It gives chlorine, taste and odor as the only certified reduction claim and found no NSF or WQA listing, as of Sep 3, 2026.

IAPMO's certificate pages block automated access, so the listing wasn't confirmed with IAPMO directly. Treat this as a pointer, not a substitute for the listing. NSF/ANSI 372 covers the lead content of parts that touch water, not what the filter removes.

manufacturer source: The product page says the system is certified to NSF/ANSI 372 for lead-free materials.

NSF/ANSI 372 covers the lead content of parts that touch water, not how much the filters remove. The page doesn't name the certifying body. On Oct 13, 2026, NSF's drinking water treatment unit listings for the Waterdrop trade name showed other Waterdrop models but no WD-WHF3T or WF20 model. Its system component listings returned no Waterdrop products. So the claim couldn't be confirmed on a certifier listing, though it may be held through another certifier.