City Of Gridley
PWSID CA0410004 · Gridley, California · serves 7,269 people · groundwater source
F
Failing
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFHxS | 12.8 ppt | 10 ppt | 6/3/2024 |
| PFHxS | 12.3 ppt | 10 ppt | 12/2/2024 |
| PFOS | 10.5 ppt | 4 ppt | 6/3/2024 |
| PFNA | 9.9 ppt | 10 ppt | 6/3/2024 |
| PFNA | 9.6 ppt | 10 ppt | 12/2/2024 |
| PFOS | 9 ppt | 4 ppt | 12/2/2024 |
| PFPeA | 6.5 ppt | — | 6/3/2024 |
| PFPeA | 6.2 ppt | — | 12/2/2024 |
| PFHxA | 5.3 ppt | — | 6/3/2024 |
| PFHxA | 5.2 ppt | — | 12/2/2024 |
| PFHpA | 3.5 ppt | — | 6/3/2024 |
| PFHpA | 3.2 ppt | — | 12/2/2024 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2024-10-17 | LEAD AND COPPER RULE REVISIONS | TT | Yes | Unaddressed |
| 2024-10-17 | LEAD AND COPPER RULE REVISIONS | RPT | No | Unaddressed |