Mesa City Of
PWSID AZ0407095 · Mesa, Arizona · serves 466,000 people · surface water source
C
Fair
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFBS | 15.2 ppt | — | 8/7/2025 |
| PFBS | 15.2 ppt | — | 7/9/2025 |
| PFBS | 13.6 ppt | — | 4/9/2025 |
| PFBS | 13.5 ppt | — | 4/9/2025 |
| PFBS | 11.9 ppt | — | 10/6/2025 |
| PFBS | 11.7 ppt | — | 10/6/2025 |
| PFHxS | 9.3 ppt | 10 ppt | 12/10/2024 |
| PFHxS | 8.6 ppt | 10 ppt | 6/9/2025 |
| PFHxS | 8.3 ppt | 10 ppt | 6/11/2024 |
| PFHxS | 7.4 ppt | 10 ppt | 12/11/2024 |
| PFBS | 5.3 ppt | — | 1/13/2025 |
| PFBS | 5.2 ppt | — | 1/13/2025 |
| PFBS | 4.7 ppt | — | 8/14/2024 |
| PFBS | 3.8 ppt | — | 2/11/2025 |
| PFHxA | 3.2 ppt | — | 6/11/2024 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2025-08-01 | Revised Total Coliform Rule | MON | No | Resolved |
| 2025-03-01 | Bromate | MR | No | Resolved |
| 2025-02-01 | Bromate | MR | No | Resolved |
| 2023-01-01 | 1,2,4-Trichlorobenzene | MR | No | Resolved |
| 2023-01-01 | cis-1,2-Dichloroethylene | MR | No | Resolved |
| 2023-01-01 | Xylenes, Total | MR | No | Resolved |
| 2023-01-01 | DICHLOROMETHANE | MR | No | Resolved |
| 2023-01-01 | o-Dichlorobenzene | MR | No | Resolved |
| 2023-01-01 | p-Dichlorobenzene | MR | No | Resolved |
| 2023-01-01 | Vinyl chloride | MR | No | Resolved |
| 2023-01-01 | 1,1-Dichloroethylene | MR | No | Resolved |
| 2023-01-01 | trans-1,2-Dichloroethylene | MR | No | Resolved |
| 2023-01-01 | 1,2-Dichloroethane | MR | No | Resolved |
| 2023-01-01 | 1,1,1-Trichloroethane | MR | No | Resolved |
| 2023-01-01 | Carbon tetrachloride | MR | No | Resolved |
| 2023-01-01 | 1,2-Dichloropropane | MR | No | Resolved |
| 2023-01-01 | Trichloroethylene | MR | No | Resolved |
| 2023-01-01 | 1,1,2-Trichloroethane | MR | No | Resolved |
| 2023-01-01 | Tetrachloroethylene | MR | No | Resolved |
| 2023-01-01 | CHLOROBENZENE | MR | No | Resolved |
| 2023-01-01 | Benzene | MR | No | Resolved |
| 2023-01-01 | Toluene | MR | No | Resolved |
| 2023-01-01 | Ethylbenzene | MR | No | Resolved |
| 2023-01-01 | Styrene | MR | No | Resolved |
| 2023-01-01 | Di(2-ethylhexyl) phthalate | MR | No | Resolved |