Flowing Wells Irrigation District
PWSID AZ0410051 · Tucson, Arizona · serves 16,000 people · groundwater source
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Failing
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFHxS | 9 ppt | 10 ppt | 2/28/2023 |
| PFHxS | 8 ppt | 10 ppt | 8/3/2023 |
| PFOS | 6 ppt | 4 ppt | 2/28/2023 |
| PFHxS | 5 ppt | 10 ppt | 2/28/2023 |
| PFHxS | 5 ppt | 10 ppt | 8/3/2023 |
| PFOA | 5 ppt | 4 ppt | 2/28/2023 |
| PFOA | 5 ppt | 4 ppt | 8/3/2023 |
| PFBS | 4 ppt | — | 2/28/2023 |
| PFPeA | 4 ppt | — | 2/28/2023 |
| PFOS | 4 ppt | 4 ppt | 8/3/2023 |
| PFBS | 4 ppt | — | 8/3/2023 |
| PFHxA | 3 ppt | — | 2/28/2023 |
| PFHxA | 3 ppt | — | 8/3/2023 |
| PFPeA | 3 ppt | — | 8/3/2023 |
| PFHxS | 3 ppt | 10 ppt | 2/28/2023 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2026-02-01 | Revised Total Coliform Rule | RPT | No | Resolved |
| 2026-01-01 | Lead and Copper Rule | MR | No | Unaddressed |
| 2025-07-01 | 1,2,4-Trichlorobenzene | MR | No | Resolved |
| 2025-07-01 | cis-1,2-Dichloroethylene | MR | No | Resolved |
| 2025-07-01 | Xylenes, Total | MR | No | Resolved |
| 2025-07-01 | DICHLOROMETHANE | MR | No | Resolved |
| 2025-07-01 | o-Dichlorobenzene | MR | No | Resolved |
| 2025-07-01 | p-Dichlorobenzene | MR | No | Resolved |
| 2025-07-01 | Vinyl chloride | MR | No | Resolved |
| 2025-07-01 | 1,1-Dichloroethylene | MR | No | Resolved |
| 2025-07-01 | trans-1,2-Dichloroethylene | MR | No | Resolved |
| 2025-07-01 | 1,2-Dichloroethane | MR | No | Resolved |
| 2025-07-01 | 1,1,1-Trichloroethane | MR | No | Resolved |
| 2025-07-01 | Carbon tetrachloride | MR | No | Resolved |
| 2025-07-01 | 1,2-Dichloropropane | MR | No | Resolved |
| 2025-07-01 | Trichloroethylene | MR | No | Resolved |
| 2025-07-01 | 1,1,2-Trichloroethane | MR | No | Resolved |
| 2025-07-01 | Tetrachloroethylene | MR | No | Resolved |
| 2025-07-01 | CHLOROBENZENE | MR | No | Resolved |
| 2025-07-01 | Benzene | MR | No | Resolved |
| 2025-07-01 | Toluene | MR | No | Resolved |
| 2025-07-01 | Ethylbenzene | MR | No | Resolved |
| 2025-07-01 | Styrene | MR | No | Resolved |
| 2025-07-01 | 1,2,4-Trichlorobenzene | MR | No | Resolved |
| 2025-07-01 | cis-1,2-Dichloroethylene | MR | No | Resolved |
| 2025-07-01 | Xylenes, Total | MR | No | Resolved |
| 2025-07-01 | DICHLOROMETHANE | MR | No | Resolved |
| 2025-07-01 | o-Dichlorobenzene | MR | No | Resolved |
| 2025-07-01 | p-Dichlorobenzene | MR | No | Resolved |
| 2025-07-01 | Vinyl chloride | MR | No | Resolved |
| 2025-07-01 | 1,1-Dichloroethylene | MR | No | Resolved |
| 2025-07-01 | trans-1,2-Dichloroethylene | MR | No | Resolved |
| 2025-07-01 | 1,2-Dichloroethane | MR | No | Resolved |
| 2025-07-01 | 1,1,1-Trichloroethane | MR | No | Resolved |
| 2025-07-01 | Carbon tetrachloride | MR | No | Resolved |
| 2025-07-01 | 1,2-Dichloropropane | MR | No | Resolved |
| 2025-07-01 | Trichloroethylene | MR | No | Resolved |
| 2025-07-01 | 1,1,2-Trichloroethane | MR | No | Resolved |
| 2025-07-01 | Tetrachloroethylene | MR | No | Resolved |
| 2025-07-01 | CHLOROBENZENE | MR | No | Resolved |
| 2025-07-01 | Benzene | MR | No | Resolved |
| 2025-07-01 | Toluene | MR | No | Resolved |
| 2025-07-01 | Ethylbenzene | MR | No | Resolved |
| 2025-07-01 | Styrene | MR | No | Resolved |
| 2025-04-12 | Public Notice | Other | No | Resolved |
| 2024-12-20 | Public Notice | Other | No | Resolved |
| 2024-10-17 | LEAD AND COPPER RULE REVISIONS | RPT | No | Resolved |
| 2024-10-17 | LEAD AND COPPER RULE REVISIONS | TT | Yes | Resolved |
| 2024-01-01 | TTHM | MR | No | Resolved |
| 2024-01-01 | Total Haloacetic Acids (HAA5) | MR | No | Resolved |
| 2023-11-01 | Revised Total Coliform Rule | MON | No | Resolved |
| 2023-10-01 | TTHM | MR | No | Resolved |
| 2023-10-01 | Total Haloacetic Acids (HAA5) | MR | No | Resolved |
| 2023-04-01 | Arsenic | MR | No | Resolved |
| 2023-01-01 | Lead and Copper Rule | MR | No | Resolved |