PFAS Analyte · UCMR 5
NMeFOSAA
N-Methyl perfluorooctane sulfonamido acetic acid
· UCMR 5· No individual MCL set
1
Systems monitored
with official records
1
Systems with detections
100.0% detection rate
2
Detected samples
of 2 total samples
Apr 2025 – Sep 2025
Monitoring period
per UCMR 5 schedule
Detection Rate — NMeFOSAA
Systems with any detection100.0%
1 of 1 monitored systems
Sample-level detection rate100.0%
2 detections across 2 total samples
States with Most NMeFOSAA Detections
Water Systems with Most NMeFOSAA Detections
Systems ranked by number of samples detected above the minimum reporting limit. Detection count reflects monitoring frequency, not concentration level.
All records are from official EPA UCMR 5 monitoring data. Detection counts reflect the number of samples where the analyte was reported above the minimum reporting limit (MRL). They are not compliance determinations and do not imply a health violation.
NMeFOSAA at a Glance
Full NameN-Methyl perfluorooctane sulfonamido acetic acid
UCMR RoundUCMR 5
EPA MCLSee mixture rule
Systems Monitored1
Systems Detected1
Detection Rate100.0%
Note
PFAS precursor. No MCL as of April 2024. Monitored under UCMR 5.