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NSF/ANSI 42: DRINKING WATER TREATMENT UNITS – AESTHETIC EFFECTS

This standard establishes minimum requirements for systems designed to reduce non-health-related contaminants.

SCOPE Point-of-use and point-of-entry systems
CLAIMS FreeChlorine, taste and odor, chloramine, particulate, iron, manganese, zinc and total dissolved solids (TDS)
TESTING Material safety, structural integrity and specific aesthetic-related contaminant reduction claims (claims vary by product)

NSF/ANSI 53: DRINKING WATER TREATMENT UNITS – HEALTH EFFECTS

This standard establishes minimum requirements for systems designed to reduce specific health-related contaminants.

SCOPE Point-of-use and point-of-entry systems
CLAIMS This standard offers over 50 contaminant reduction claims. Some of the most popular include: lead, Cryptosporidium, VOCs and chromium.
TESTING Material safety, structural integrity and specific health-related contaminant reduction claims (claims vary by product)

NSF/ANSI 401: EMERGING COMPOUNDS/INCIDENTAL CONTAMINANTS

This standard addresses the ability of a water treatment device to remove up to 15 individual contaminants which have been identified in published studies as occurring in drinking water. The contaminants covered in NSF/ANSI 401 have been detected in drinking water supplies at trace levels and can affect some consumers’ perception of drinking water quality.

SCOPE Point-of-use and point-of-entry systems
CLAIMS This standard offers up to 15 specific contaminant reduction claims. Some of the most popular categories include prescription drugs, over-the-counter medications, herbicides, pesticides and chemical compounds.
TESTING Material safety, structural integrity and specific emerging compounds/incidental contaminants outlined in the standard.

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