PlainWater
States → California

CALEXICO, CITY OF

PWS ID: CA1310002 · CALEXICO, California 92231

PFAS Detected

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

Population Served
40,357
Total Violations
17
Health-Based Violations
7
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
8,638
County
Imperial
School/Daycare
No
MCL Violations
6
Monitoring Violations
0
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
TTHM MCL 6 2019
LEAD AND COPPER RULE REVISIONS RPT 1 2024
LEAD AND COPPER RULE REVISIONS TT 1 2024

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 4 of 95 samples detected PFAS.

Contaminant Date Result MRL Status
PFTrDA 7/22/2024 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 7/22/2024 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 7/22/2024 <0.006 µg/L 0.006 µg/L Not Detected
lithium 7/22/2024 50.0000 µg/L 9 µg/L Detected
PFTA 7/22/2024 <0.008 µg/L 0.008 µg/L Not Detected
NFDHA 4/23/2024 <0.02 µg/L 0.02 µg/L Not Detected
PFBA 4/23/2024 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 4/23/2024 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
9Cl-PF3ONS 4/23/2024 <0.002 µg/L 0.002 µg/L Not Detected
11Cl-PF3OUdS 4/23/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
lithium 4/23/2024 50.0000 µg/L 9 µg/L Detected
PFPeA 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMPA 4/23/2024 <0.004 µg/L 0.004 µg/L Not Detected
8:2 FTS 4/23/2024 <0.005 µg/L 0.005 µg/L Not Detected
6:2 FTS 4/23/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFDoA 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpS 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 4/23/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHpA 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 4/23/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 4/23/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOA 4/23/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
4:2 FTS 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
NEtFOSAA 4/23/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 4/23/2024 <0.002 µg/L 0.002 µg/L Not Detected
PFTA 4/23/2024 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 4/23/2024 <0.007 µg/L 0.007 µg/L Not Detected
PFHxA 4/23/2024 <0.003 µg/L 0.003 µg/L Not Detected
NMeFOSAA 4/23/2024 <0.006 µg/L 0.006 µg/L Not Detected
PFHxA 3/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFNA 3/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFDoA 3/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFDA 3/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 3/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFOS 3/18/2024 <0.004 µg/L 0.004 µg/L Not Detected
PFHxS 3/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 3/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 3/18/2024 <0.003 µg/L 0.003 µg/L Not Detected
PFTA 3/18/2024 <0.008 µg/L 0.008 µg/L Not Detected
NEtFOSAA 3/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
PFUnA 3/18/2024 <0.002 µg/L 0.002 µg/L Not Detected
NMeFOSAA 3/18/2024 <0.006 µg/L 0.006 µg/L Not Detected
HFPO-DA 3/18/2024 <0.005 µg/L 0.005 µg/L Not Detected
NFDHA 3/18/2024 <0.02 µg/L 0.02 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.