N-Methyl Perfluorooctane Sulfonamide (NMeFOSA)
Status: No national drinking water standard exists
N-Methyl Perfluorooctane Sulfonamide (NMeFOSA) is a member of a class of chemicals called per- and polyfluoroalkyl substances or PFAS. These chemicals were used in the production of non-stick, stain repellent and chemically inert coatings. Click here to read more about perfluorinated chemicals.
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states detected
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utilities detected
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people served
State and national drinking water standards and health guidelines
EWG Health Guideline 1 ppt
The EWG Health Guideline of 1 ppt for N-methyl perfluorooctane sulfonamide (NMeFOSA) was defined by EWG based on studies by Phillipe Grandjean of Harvard University and many other independent researchers who found reduced effectiveness of vaccines and adverse impacts on mammary gland development from exposure to PFOA and PFOS, the two PFAS most widely detected in drinking water. This health guideline protects against applies to the entire class of PFAS detected in water.
ppt = parts per trillion
States reporting N-methyl perfluorooctane sulfonamide (NMeFOSA) in drinking water
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Filtering technologies that reduce N-methyl perfluorooctane sulfonamide (NMeFOSA)
Activated Carbon
Reverse Osmosis
Utilities with the highest amounts of N-methyl perfluorooctane sulfonamide (NMeFOSA), 2017-2019
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| Utility | Location | Tests | Average level | People served |
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