Modesto, City Of
PWSID CA5010010 · Modesto, California · serves 218,915 people · surface water source
C
Fair
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFOS | 26 ppt | 4 ppt | 8/28/2024 |
| PFOS | 12 ppt | 4 ppt | 8/28/2024 |
| PFOS | 11 ppt | 4 ppt | 11/16/2023 |
| PFOS | 9.9 ppt | 4 ppt | 5/16/2024 |
| PFOS | 9.7 ppt | 4 ppt | 11/16/2023 |
| PFHxS | 9.3 ppt | 10 ppt | 8/28/2024 |
| PFOS | 9.1 ppt | 4 ppt | 5/16/2024 |
| PFOA | 8.6 ppt | 4 ppt | 8/28/2024 |
| PFOA | 7.4 ppt | 4 ppt | 8/28/2024 |
| PFHxS | 6.9 ppt | 10 ppt | 9/12/2024 |
| PFOS | 6.8 ppt | 4 ppt | 5/16/2024 |
| PFPeA | 6.7 ppt | — | 8/28/2024 |
| PFOS | 6.4 ppt | 4 ppt | 5/16/2024 |
| PFOS | 6.3 ppt | 4 ppt | 8/28/2024 |
| PFOA | 6.2 ppt | 4 ppt | 5/16/2024 |
| PFHxA | 6.1 ppt | — | 8/28/2024 |
| PFOA | 5.5 ppt | 4 ppt | 8/28/2024 |
| PFOS | 5.3 ppt | 4 ppt | 11/16/2023 |
| PFHxS | 5.2 ppt | 10 ppt | 5/16/2024 |
| PFHxS | 4.7 ppt | 10 ppt | 11/16/2023 |
| PFOS | 4.6 ppt | 4 ppt | 11/16/2023 |
| PFPeA | 4.6 ppt | — | 9/12/2024 |
| PFOS | 4.6 ppt | 4 ppt | 9/12/2024 |
| PFPeA | 4.5 ppt | — | 5/15/2024 |
| PFOS | 4.5 ppt | 4 ppt | 1/4/2024 |
| PFPeA | 4.5 ppt | — | 8/28/2024 |
| PFOS | 4.5 ppt | 4 ppt | 11/16/2023 |
| PFOA | 4.4 ppt | 4 ppt | 5/16/2024 |
| PFHxS | 4.4 ppt | 10 ppt | 8/28/2024 |
| PFOA | 4.4 ppt | 4 ppt | 5/16/2024 |
| PFHxS | 4.3 ppt | 10 ppt | 5/15/2024 |
| PFOA | 4.3 ppt | 4 ppt | 11/16/2023 |
| PFHxA | 4.3 ppt | — | 8/28/2024 |
| PFBS | 4.3 ppt | — | 5/16/2024 |
| PFHxS | 4.2 ppt | 10 ppt | 11/16/2023 |
| PFOA | 4.1 ppt | 4 ppt | 9/12/2024 |
| PFOS | 4 ppt | 4 ppt | 5/16/2024 |
| PFHxS | 4 ppt | 10 ppt | 5/16/2024 |
| PFHxA | 3.9 ppt | — | 5/15/2024 |
| PFHxA | 3.9 ppt | — | 9/12/2024 |
| PFHxS | 3.9 ppt | 10 ppt | 5/16/2024 |
| PFPeA | 3.8 ppt | — | 11/16/2023 |
| PFPeA | 3.8 ppt | — | 5/16/2024 |
| PFHpA | 3.6 ppt | — | 8/28/2024 |
| PFHxS | 3.6 ppt | 10 ppt | 1/4/2024 |
| PFPeA | 3.6 ppt | — | 11/16/2023 |
| PFHxA | 3.4 ppt | — | 5/16/2024 |
| PFBS | 3.4 ppt | — | 9/12/2024 |
| PFHxA | 3.4 ppt | — | 11/16/2023 |
| PFHxS | 3.4 ppt | 10 ppt | 11/16/2023 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
No violations on record in the period covered. 🎉