ZeroWater Review, Is ZeroWater Non-Toxic?
ZeroWater averages 95 out of 100 on PFAS Authority's PFAS and toxin screen across the 28 ZeroWater products graded as of October 2026, and all 28 reach its 70 point pass mark.
ZeroWater grades Excellent on our four-band scale.
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
What ZeroWater says and does about PFAS
ZeroWater claims PFAS reduction, and which claim applies depends on the generation of filter. Culligan says the current Culligan with ZeroWater Technology line is certified by IAPMO under NSF/ANSI 53 for 99.7 percent reduction of Total PFAS, while the legacy five stage ZeroWater filter is certified for PFOA and PFOS only. In independent university testing across 75 PFAS compounds, ZeroWater removed more than 99 percent, the best of the pitchers tested.
- Brand statementCulligan states that the current line is independently certified by IAPMO to reduce Total PFAS by 99.7 percent under NSF/ANSI 53 standards. Culligan ↗
- Brand statementCulligan separates the two generations on its own certifications page, listing the legacy ZeroWater filter as IAPMO-certified for lead, PFOA and PFOS, chromium and mercury, and the newer line as also certified for total PFAS. Culligan ↗
- Brand statementZeroWater’s own site says its five stage ion exchange filter is IAPMO certified to reduce PFOA and PFOS along with lead, chlorine, chromium and mercury, a narrower claim than Total PFAS. ZeroWater ↗
- StudyA peer-reviewed study from the Universite de Montreal tested pitcher filters against 75 PFAS compounds and reported volume-weighted average removal above 99 percent for ZeroWater on both water sources, the strongest result among the pitchers tested. Frontiers in Environmental Chemistry ↗
- Government sourcePennsylvania’s Department of Environmental Protection lists Culligan ZeroWater pitchers and dispensers among point-of-use units it describes as NSF 53 certified for PFOA and PFOS removal. Pennsylvania Department of Environmental Protection ↗
Sources checked October 1, 2026. A brand statement is the company’s own claim, which we report but have not verified. Our grades are model-based estimates, not lab tests.
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What to buy instead Good or better, in the categories ZeroWater sells
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ZeroWater and PFAS, common questions
- Does ZeroWater have PFAS?
- ZeroWater averages 95 out of 100 on PFAS Authority's PFAS and toxin screen across the 28 ZeroWater products graded as of October 2026, and all 28 reach its 70 point pass mark. Grades are model-based estimates built from published materials, ingredients and disclosures, not lab tests. Culligan states that its current Culligan with ZeroWater Technology pitchers and dispensers are certified by IAPMO under NSF/ANSI 53 to reduce 99.7 percent of Total PFAS, while the legacy five stage ZeroWater filter is certified for PFOA and PFOS only. A peer-reviewed study that measured 75 PFAS compounds found ZeroWater above 99 percent removal on both water sources it tested.
- Is ZeroWater non-toxic?
- ZeroWater 40-Cup Glass Water Filter Dispenser is the highest-graded ZeroWater product we have scored, at 100/100. It depends on the product line rather than the brand, so check the grade of the exact item you are buying.
- Which ZeroWater products are lower concern for PFAS?
- The highest-graded ZeroWater products we have scored are ZeroWater 40-Cup Glass Water Filter Dispenser, ZeroWater 500ml Stainless Steel Bottle, Avanti ZJ007 ZeroWater Water Bottle Kit. That is our model-based estimate from materials and public disclosure, not a lab test.
Every grade uses the same public rubric. How grades work →