PlainWater
States → California

SEBASTOPOL, CITY OF

PWS ID: CA4910011 · SEBASTOPOL, California 95472

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
7,522
Total Violations
19
Health-Based Violations
17
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
2,947
County
Sonoma
School/Daycare
No
MCL Violations
17
Monitoring Violations
0
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 11 2009
Coliform (TCR) MCL 6 2008

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 6 of 240 samples detected PFAS.

Contaminant Date Result MRL Status
6:2 FTS 9/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 9/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 9/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBA 9/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFMBA 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 9/9/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 9/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 9/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFTrDA 9/9/2024 <0.007 µg/L 0.007 µg/L Not Detected
NMeFOSAA 9/9/2024 <0.006 µg/L 0.006 µg/L Not Detected
HFPO-DA 9/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFNA 9/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 9/9/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFHxS 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 9/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpA 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 9/9/2024 10.7000 µg/L 9 µg/L Detected
PFOS 9/9/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 9/9/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 9/9/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 9/9/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFBS 9/9/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 5/1/2023 <0.007 µg/L 0.007 µg/L Not Detected
PFTA 5/1/2023 <0.008 µg/L 0.008 µg/L Not Detected
PFDA 5/1/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 5/1/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFNA 5/1/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 5/1/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/1/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 5/1/2023 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 5/1/2023 <0.005 µg/L 0.005 µg/L Not Detected
PFHxA 5/1/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 5/1/2023 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 5/1/2023 <0.006 µg/L 0.006 µg/L Not Detected
PFMBA 5/1/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 5/1/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 5/1/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 5/1/2023 <0.004 µg/L 0.004 µg/L Not Detected
PFEESA 5/1/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 5/1/2023 <0.002 µg/L 0.002 µg/L Not Detected
PFPeA 5/1/2023 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 5/1/2023 <0.004 µg/L 0.004 µg/L Not Detected
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.