City Of Arroyo Grande Utilities Division
PWSID CA4010001 · Arroyo Grande, California · serves 17,963 people · surface water source
D
Poor
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFBS | 11 ppt | — | 12/19/2023 |
| PFBS | 11 ppt | — | 6/19/2024 |
| PFBS | 11 ppt | — | 9/10/2024 |
| PFBS | 7.3 ppt | — | 3/12/2024 |
| PFOS | 6.8 ppt | 4 ppt | 6/19/2024 |
| PFOA | 5.8 ppt | 4 ppt | 6/19/2024 |
| PFOS | 5.6 ppt | 4 ppt | 9/10/2024 |
| PFHxS | 5.5 ppt | 10 ppt | 6/19/2024 |
| PFOA | 4.6 ppt | 4 ppt | 9/10/2024 |
| PFPeA | 4.5 ppt | — | 12/19/2023 |
| PFOS | 4.3 ppt | 4 ppt | 12/19/2023 |
| PFHxS | 4.3 ppt | 10 ppt | 9/10/2024 |
| PFHxS | 4.1 ppt | 10 ppt | 12/19/2023 |
| PFOA | 4.1 ppt | 4 ppt | 12/19/2023 |
| PFPeA | 4.1 ppt | — | 6/19/2024 |
| PFPeA | 3.9 ppt | — | 3/12/2024 |
| PFHxA | 3.5 ppt | — | 6/19/2024 |
| PFHxA | 3.4 ppt | — | 12/19/2023 |
| PFHxA | 3.3 ppt | — | 9/10/2024 |
| PFPeA | 3.3 ppt | — | 9/10/2024 |
| PFHxS | 3 ppt | 10 ppt | 3/12/2024 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2025-05-01 | Revised Total Coliform Rule | MON | No | Archived |