SAN JOAQUIN COUNTY-MOKELUMNE ACRES
PWS ID: CA3910017 · STOCKTON, California 95205
PFAS Detected
6 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
Population Served
3,802
Total Violations
0
Health-Based Violations
0
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,152
- County
- San Joaquin
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 0
- Treatment Tech Violations
- 0
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 17 of 300 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| lithium | 7/14/2025 | <9 µg/L | 9 µg/L | Not Detected |
| PFHpA | 7/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxS | 7/14/2025 | 0.0043 µg/L | 0.003 µg/L | Detected |
| PFNA | 7/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOS | 7/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOA | 7/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFBS | 7/14/2025 | 0.0075 µg/L | 0.003 µg/L | Detected |
| PFUnA | 7/14/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 9Cl-PF3ONS | 7/14/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 7/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| ADONA | 7/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFTA | 7/14/2025 | <0.008 µg/L | 0.008 µg/L | Not Detected |
| PFBA | 7/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 6:2 FTS | 7/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFDA | 7/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHxA | 7/14/2025 | 0.0034 µg/L | 0.003 µg/L | Detected |
| HFPO-DA | 7/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFTrDA | 7/14/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NMeFOSAA | 7/14/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| PFHpS | 7/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDoA | 7/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NEtFOSAA | 7/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| 4:2 FTS | 7/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 8:2 FTS | 7/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFMPA | 7/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFPeA | 7/14/2025 | 0.0033 µg/L | 0.003 µg/L | Detected |
| PFMBA | 7/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFEESA | 7/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| NFDHA | 7/14/2025 | <0.02 µg/L | 0.02 µg/L | Not Detected |
| PFPeS | 7/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFOS | 7/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFBA | 7/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| HFPO-DA | 7/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| ADONA | 7/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 9Cl-PF3ONS | 7/14/2025 | <0.002 µg/L | 0.002 µg/L | Not Detected |
| 11Cl-PF3OUdS | 7/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFDoA | 7/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| 6:2 FTS | 7/14/2025 | <0.005 µg/L | 0.005 µg/L | Not Detected |
| PFOA | 7/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHxS | 7/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFNA | 7/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| PFHpA | 7/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFBS | 7/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFDA | 7/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFPeS | 7/14/2025 | <0.004 µg/L | 0.004 µg/L | Not Detected |
| lithium | 7/14/2025 | <9 µg/L | 9 µg/L | Not Detected |
| PFTrDA | 7/14/2025 | <0.007 µg/L | 0.007 µg/L | Not Detected |
| NMeFOSAA | 7/14/2025 | <0.006 µg/L | 0.006 µg/L | Not Detected |
| 4:2 FTS | 7/14/2025 | <0.003 µg/L | 0.003 µg/L | Not Detected |
| PFHpS | 7/14/2025 | <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.