Colton, City Of
PWSID CA3610014 · Colton, California · serves 46,525 people · groundwater source
D
Poor
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFOS | 18 ppt | 4 ppt | 8/30/2023 |
| PFOS | 13 ppt | 4 ppt | 1/29/2024 |
| PFOS | 11 ppt | 4 ppt | 7/25/2023 |
| PFBS | 10 ppt | — | 7/25/2023 |
| PFOA | 5.9 ppt | 4 ppt | 8/30/2023 |
| PFBS | 5.3 ppt | — | 8/30/2023 |
| PFHxS | 5.1 ppt | 10 ppt | 8/30/2023 |
| PFHxS | 5.1 ppt | 10 ppt | 1/29/2024 |
| PFHxS | 4.9 ppt | 10 ppt | 7/25/2023 |
| PFOS | 4.7 ppt | 4 ppt | 7/25/2023 |
| PFOA | 4.5 ppt | 4 ppt | 7/25/2023 |
| PFPeA | 4.5 ppt | — | 7/25/2023 |
| PFPeA | 4.3 ppt | — | 1/23/2024 |
| PFOS | 4.1 ppt | 4 ppt | 1/23/2024 |
| PFHxS | 4 ppt | 10 ppt | 7/25/2023 |
| PFHxS | 4 ppt | 10 ppt | 1/23/2024 |
| PFHxA | 3.5 ppt | — | 1/23/2024 |
| PFHxA | 3.2 ppt | — | 7/25/2023 |
| PFBS | 3.2 ppt | — | 7/25/2023 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2022-01-01 | Nitrate | MR | No | Resolved |