Lago Del Oro Water Company
PWSID AZ0411117 · Tucson, Arizona · serves 18,132 people · groundwater source
C
Fair
PFAS test results (EPA UCMR 5)
| Contaminant | Result | Federal limit (MCL) | Sampled |
|---|---|---|---|
| PFPeA | 6.5 ppt | — | 10/9/2024 |
| PFPeA | 6 ppt | — | 4/30/2025 |
| PFHxA | 4.1 ppt | — | 10/9/2024 |
| PFHxA | 3.7 ppt | — | 4/30/2025 |
ppt = parts per trillion (ng/L). Rows highlighted red meet or exceed the 2024 federal limit.
Violation history
| Date | Violation | Type | Health-based | Status |
|---|---|---|---|---|
| 2026-04-01 | 1,2,4-Trichlorobenzene | MR | No | Archived |
| 2026-04-01 | cis-1,2-Dichloroethylene | MR | No | Archived |
| 2026-04-01 | Xylenes, Total | MR | No | Archived |
| 2026-04-01 | DICHLOROMETHANE | MR | No | Archived |
| 2026-04-01 | o-Dichlorobenzene | MR | No | Archived |
| 2026-04-01 | p-Dichlorobenzene | MR | No | Archived |
| 2026-04-01 | Vinyl chloride | MR | No | Archived |
| 2026-04-01 | 1,1-Dichloroethylene | MR | No | Archived |
| 2026-04-01 | trans-1,2-Dichloroethylene | MR | No | Archived |
| 2026-04-01 | 1,2-Dichloroethane | MR | No | Archived |
| 2026-04-01 | 1,1,1-Trichloroethane | MR | No | Archived |
| 2026-04-01 | Carbon tetrachloride | MR | No | Archived |
| 2026-04-01 | 1,2-Dichloropropane | MR | No | Archived |
| 2026-04-01 | Trichloroethylene | MR | No | Archived |
| 2026-04-01 | 1,1,2-Trichloroethane | MR | No | Archived |
| 2026-04-01 | Tetrachloroethylene | MR | No | Archived |
| 2026-04-01 | CHLOROBENZENE | MR | No | Archived |
| 2026-04-01 | Benzene | MR | No | Archived |
| 2026-04-01 | Toluene | MR | No | Archived |
| 2026-04-01 | Ethylbenzene | MR | No | Archived |
| 2026-04-01 | Styrene | MR | No | Archived |
| 2025-07-01 | Gross Alpha, Excl. Radon and U | MR | No | Resolved |
| 2025-07-01 | Combined Uranium | MR | No | Resolved |
| 2025-07-01 | Combined Radium (-226 and -228) | MR | No | Resolved |
| 2025-07-01 | Radium-226 | MR | No | Resolved |
| 2025-07-01 | Radium-228 | MR | No | Resolved |
| 2022-01-01 | Chlorine | MR | No | Resolved |