Riverside Highland Water Company
PWSID CA3610057 · Grand Terrace, California · serves 19,053 people · groundwater source
D
Poor
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFOS | 19 ppt | 4 ppt | 1/9/2025 |
| PFOA | 18 ppt | 4 ppt | 7/22/2024 |
| PFPeA | 17 ppt | — | 7/22/2024 |
| PFOA | 15 ppt | 4 ppt | 1/9/2025 |
| PFHxS | 14 ppt | 10 ppt | 7/22/2024 |
| PFHxA | 14 ppt | — | 7/22/2024 |
| PFBS | 13 ppt | — | 7/22/2024 |
| PFOS | 12 ppt | 4 ppt | 7/22/2024 |
| PFBS | 12 ppt | — | 1/9/2025 |
| PFHxS | 11 ppt | 10 ppt | 1/9/2025 |
| PFBA | 10 ppt | — | 7/22/2024 |
| PFBA | 10 ppt | — | 1/9/2025 |
| PFPeA | 9.7 ppt | — | 1/9/2025 |
| PFHxA | 8.7 ppt | — | 1/9/2025 |
| PFHpA | 8.2 ppt | — | 7/22/2024 |
| PFHxA | 5.9 ppt | — | 1/9/2025 |
| PFHxS | 5.5 ppt | 10 ppt | 1/9/2025 |
| PFHpA | 5.1 ppt | — | 1/9/2025 |
| PFBS | 4.7 ppt | — | 1/9/2025 |
| PFPeS | 4 ppt | — | 1/9/2025 |
| PFHxS | 3.7 ppt | 10 ppt | 7/22/2024 |
| PFHxA | 3.5 ppt | — | 7/22/2024 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2024-10-01 | Lead and Copper Rule | MR | No | Addressed |