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States → California

GSWC - CALIPATRIA

PWS ID: CA1310003 · SAN DIMAS, California 91773

PFAS Detected

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

Population Served
7,363
Total Violations
6
Health-Based Violations
4
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Private
Connections
1,152
County
Imperial
School/Daycare
No
MCL Violations
0
Monitoring Violations
0
Treatment Tech Violations
4

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Surface Water Treatment Rule TT 3 2004
Interim Enhanced Surface Water Treatment Rule TT 1 2006

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 120 samples detected PFAS.

Contaminant Date Result MRL Status
PFDA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 8/5/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 8/5/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 8/5/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 8/5/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
ADONA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 8/5/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFNA 8/5/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 8/5/2024 <0.008 µg/L 0.008 µg/L Not Detected
lithium 8/5/2024 70.4000 µg/L 9 µg/L Detected
NMeFOSAA 8/5/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFMBA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTrDA 8/5/2024 <0.007 µg/L 0.007 µg/L Not Detected
HFPO-DA 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 8/5/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFEESA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 8/5/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 8/5/2024 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
NEtFOSAA 8/5/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 5/6/2024 <0.006 µg/L 0.006 µg/L Not Detected
lithium 5/6/2024 64.9000 µg/L 9 µg/L Detected
PFTA 5/6/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 5/6/2024 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 5/6/2024 <0.005 µg/L 0.005 µg/L Not Detected
9Cl-PF3ONS 5/6/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFBS 5/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 5/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 5/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 5/6/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 5/6/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 5/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
11Cl-PF3OUdS 5/6/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 5/6/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFHxA 5/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 5/6/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFDA 5/6/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 5/6/2024 <0.003 µg/L 0.003 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.