NSF certified water filters

NSF, WQA, and IAPMO certified water filters by standard and contaminant. A listing for that claim, not a ranking.

Certified on this site means a listing exists at NSF, WQA, or IAPMO for that specific contaminant claim. It is a fact about a product, not a ranking. If the only evidence is a manufacturer data sheet, the product page says so in one clause: manufacturer-reported reduction, not NSF-certified for that claim.

Standards we use: NSF/ANSI 42 (aesthetic, chlorine taste and odor), 44 (softeners), 53 (health contaminants), 55 (UV disinfection), 58 (reverse osmosis), 177 (shower filters), 244 (microbial), 401 (emerging compounds).

Certified reduction claims

A product appears here only when NSF, WQA or IAPMO names that contaminant.