Contaminant · PFAS
NMeFOSAA in drinking water
N-methyl perfluorooctanesulfonamidoacetic acid, a PFOS precursor.
What the rules say
NMeFOSAA has no federal limit or EPA health reference value.
Read the EPA source for NMeFOSAA.
Across the country
EPA tested 10,309 water systems for NMeFOSAA and found it in 1. Half of the systems that found it measured less than 11.0 ppt, and one in ten measured more than 14.0 ppt.
EPA's final UCMR 5 occurrence file contains 66,604 NMeFOSAA results from 10,309 systems. 2 results were at or above the minimum reporting level, across 1 systems. Among detections, the median was 11.0 ppt and the 90th percentile was 14.0 ppt.
Systems with the highest recorded NMeFOSAA results
| System | State | Population served | Recorded value | Records / periods |
|---|---|---|---|---|
| Cornwall-On-Hudson NY3503526 | New York | 9,700 | 14.8 ppt | 2 |
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 NMeFOSAA or the specific contaminant you want to reduce. A utility-level record is not a test of your own faucet.