PFAS Analyte · UCMR 5

PFPeS

Perfluoropentane sulfonic acid

CAS DOI: 10.1021/es200544a· UCMR 5· No individual MCL set
44
Systems monitored
with official records
44
Systems with detections
100.0% detection rate
85
Detected samples
of 85 total samples
Jan 2023 – Aug 2025
Monitoring period
per UCMR 5 schedule

Detection Rate — PFPeS

Systems with any detection100.0%

44 of 44 monitored systems

Sample-level detection rate100.0%

85 detections across 85 total samples

States with Most PFPeS Detections

Water Systems with Most PFPeS 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.

PFPeS at a Glance

Full NamePerfluoropentane sulfonic acid
CAS NumberDOI: 10.1021/es200544a
UCMR RoundUCMR 5
EPA MCLSee mixture rule
Systems Monitored44
Systems Detected44
Detection Rate100.0%

Note

No MCL as of April 2024.

EPA PFAS Drinking Water RegulationEPA UCMR 5 Source Data Back to PFAS Watchlist