Cal-Water Service Co.-Chico
PWSID CA0410002 · San Jose, California · serves 110,473 people · groundwater source
C
Fair
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFOS | 22.5 ppt | 4 ppt | 4/9/2024 |
| PFHxS | 22.1 ppt | 10 ppt | 4/9/2024 |
| PFOS | 18.8 ppt | 4 ppt | 4/9/2024 |
| PFOS | 17.2 ppt | 4 ppt | 1/17/2024 |
| PFHxS | 15.3 ppt | 10 ppt | 1/17/2024 |
| PFHxS | 13.1 ppt | 10 ppt | 4/9/2024 |
| PFOS | 13.1 ppt | 4 ppt | 2/6/2024 |
| PFHxS | 12.6 ppt | 10 ppt | 2/6/2024 |
| PFOS | 12.5 ppt | 4 ppt | 7/16/2024 |
| PFHxS | 11.8 ppt | 10 ppt | 10/4/2023 |
| PFHxS | 11.5 ppt | 10 ppt | 7/16/2024 |
| PFOS | 11 ppt | 4 ppt | 10/4/2023 |
| PFHxS | 9.8 ppt | 10 ppt | 6/19/2024 |
| PFOS | 9.6 ppt | 4 ppt | 3/20/2024 |
| PFBS | 9.6 ppt | — | 4/9/2024 |
| PFHxS | 8.9 ppt | 10 ppt | 7/16/2024 |
| PFHxS | 8.8 ppt | 10 ppt | 12/12/2023 |
| PFHxS | 7.9 ppt | 10 ppt | 4/9/2024 |
| PFHxS | 6.9 ppt | 10 ppt | 7/10/2024 |
| PFOA | 6.8 ppt | 4 ppt | 4/9/2024 |
| PFOS | 6.6 ppt | 4 ppt | 10/4/2023 |
| PFHxS | 6.2 ppt | 10 ppt | 4/9/2024 |
| PFHxA | 6 ppt | — | 4/9/2024 |
| PFOA | 5.9 ppt | 4 ppt | 1/17/2024 |
| PFOS | 5.7 ppt | 4 ppt | 4/9/2024 |
| PFOS | 5.7 ppt | 4 ppt | 12/12/2023 |
| PFOS | 5.6 ppt | 4 ppt | 4/9/2024 |
| PFOS | 5.6 ppt | 4 ppt | 7/16/2024 |
| PFPeA | 5.3 ppt | — | 4/9/2024 |
| PFOS | 5.1 ppt | 4 ppt | 7/10/2024 |
| PFHxS | 4.8 ppt | 10 ppt | 10/4/2023 |
| PFHxS | 4.8 ppt | 10 ppt | 10/4/2023 |
| PFHxS | 4.5 ppt | 10 ppt | 5/13/2024 |
| PFPeA | 4.4 ppt | — | 1/17/2024 |
| PFHxS | 4.3 ppt | 10 ppt | 3/20/2024 |
| PFBS | 4.3 ppt | — | 1/17/2024 |
| PFHxS | 4.1 ppt | 10 ppt | 11/15/2023 |
| PFHxA | 4.1 ppt | — | 1/17/2024 |
| PFOS | 4 ppt | 4 ppt | 10/4/2023 |
| PFOS | 4 ppt | 4 ppt | 1/24/2024 |
| PFBS | 3.8 ppt | — | 10/4/2023 |
| PFHxS | 3.8 ppt | 10 ppt | 1/23/2024 |
| PFHxS | 3.7 ppt | 10 ppt | 7/15/2024 |
| PFBS | 3.5 ppt | — | 12/12/2023 |
| PFBS | 3.4 ppt | — | 4/9/2024 |
| PFBS | 3 ppt | — | 6/19/2024 |
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. 🎉