Contaminant · PFAS
NEtFOSAA in drinking water
N-ethyl perfluorooctanesulfonamidoacetic acid, a PFOS precursor.
What the rules say
NEtFOSAA has no federal limit or EPA health reference value.
Read the EPA source for NEtFOSAA.
Across the country
EPA tested 10,309 water systems for NEtFOSAA and found it in 1. Half of the systems that found it measured less than 6.9 ppt, and one in ten measured more than 6.9 ppt.
EPA's final UCMR 5 occurrence file contains 66,603 NEtFOSAA results from 10,309 systems. 1 results were at or above the minimum reporting level, across 1 systems. Among detections, the median was 6.9 ppt and the 90th percentile was 6.9 ppt.
Systems with the highest recorded NEtFOSAA results
| System | State | Population served | Recorded value | Records / periods |
|---|---|---|---|---|
| Dade City Water Dept FL6510424 | Florida | 15,561 | 6.9 ppt | 1 |
Filters and testing
NSF/ANSI 53 or 58 with a PFAS reduction claim
A standard number by itself is not a contaminant claim. Check the product's current certification listing and performance data sheet for NEtFOSAA or the specific contaminant you want to reduce. A utility-level record is not a test of your own faucet.