PFAS Analyte · UCMR 5

PFHpS

Perfluoroheptane sulfonic acid

CAS 375-92-8· UCMR 5· No individual MCL set
5
Systems monitored
with official records
5
Systems with detections
100.0% detection rate
6
Detected samples
of 6 total samples
Sep 2023 – Jul 2025
Monitoring period
per UCMR 5 schedule

Detection Rate — PFHpS

Systems with any detection100.0%

5 of 5 monitored systems

Sample-level detection rate100.0%

6 detections across 6 total samples

States with Most PFHpS Detections

1
MA

Massachusetts

2 detections

2
CA

California

1 detection

3
NC

North Carolina

1 detection

4
NJ

New Jersey

1 detection

5
TX

Texas

1 detection

Water Systems with Most PFHpS Detections

Systems ranked by number of samples detected above the minimum reporting limit. Detection count reflects monitoring frequency, not concentration level.

1

Duxbury Water Department

MA4082000 · MA · 16,387 served

2 detected2

Running Springs Water District

CA3610062 · CA · 5,268 served

1 detected3

Town of Nashville

NC0464020 · NC · 5,900 served

1 detected4

Ridgewood Water

NJ0251001 · NJ · 61,700 served

1 detected5

East Cedar Creek Fwsd Brookshire

TX1070167 · TX · 14,823 served

1 detected

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.

PFHpS at a Glance

Full NamePerfluoroheptane sulfonic acid
CAS Number375-92-8
UCMR RoundUCMR 5
EPA MCLSee mixture rule
Systems Monitored5
Systems Detected5
Detection Rate100.0%

Note

No MCL as of April 2024.

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