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CHOWCHILLA CITY WATER DEPT

PWS ID: CA2010001 · CHOWCHILLA, California 93610

PFAS Detected

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

Population Served
13,916
Total Violations
23
Health-Based Violations
12
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
4,224
County
Madera
School/Daycare
No
MCL Violations
12
Monitoring Violations
7
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 12 1995
Lead and Copper Rule MR 4 2006
Radium-228 MR 2 2001
TTHM MR 1 2005

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 1 of 330 samples detected PFAS.

Contaminant Date Result MRL Status
4:2 FTS 5/5/2025 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 5/5/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFBS 5/5/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/5/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/5/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 5/5/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 5/5/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 5/5/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 5/5/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 5/5/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 5/5/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 5/5/2025 <0.004 µg/L 0.004 µg/L Not Detected
11Cl-PF3OUdS 5/5/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFPeS 5/5/2025 <0.004 µg/L 0.004 µg/L Not Detected
ADONA 5/5/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 5/5/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/5/2025 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 5/5/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFHpS 5/5/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/5/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFPeA 5/5/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/5/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 5/5/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 5/5/2025 <0.002 µg/L 0.002 µg/L Not Detected
NFDHA 5/5/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFTA 4/22/2025 <0.008 µg/L 0.008 µg/L Not Detected
NEtFOSAA 4/22/2025 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 4/22/2025 <0.006 µg/L 0.006 µg/L Not Detected
lithium 4/22/2025 <9 µg/L 9 µg/L Not Detected
PFTrDA 4/22/2025 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 4/22/2025 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 4/22/2025 <0.006 µg/L 0.006 µg/L Not Detected
lithium 4/22/2025 <9 µg/L 9 µg/L Not Detected
PFTrDA 4/22/2025 <0.007 µg/L 0.007 µg/L Not Detected
PFMBA 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 4/22/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFHpS 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 4/22/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFBS 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeA 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 4/22/2025 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 4/22/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 4/22/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 4/22/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 4/22/2025 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 4/22/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFOS 4/22/2025 <0.004 µg/L 0.004 µg/L Not Detected
NFDHA 4/22/2025 <0.02 µg/L 0.02 µg/L Not Detected
ADONA 4/22/2025 <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.