N-Ethyl Perfluorooctanesulfonamido Ethanol (EtFOSE)
Status: No national drinking water standard exists
N-Ethyl Perfluorooctanesulfonamido Ethanol (EtFOSE) 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-ethyl perfluorooctanesulfonamido ethanol (EtFOSE) 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-ethyl perfluorooctanesulfonamido ethanol (EtFOSE) in drinking water
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Filtering technologies that reduce N-ethyl perfluorooctanesulfonamido ethanol (EtFOSE)
Activated Carbon
Reverse Osmosis
Utilities with the highest amounts of N-ethyl perfluorooctanesulfonamido ethanol (EtFOSE), 2017-2019
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| Utility | Location | Tests | Average level | People served |
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