Water quality report for Maricopa, AZ — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.
A look at Maricopa's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.
Lead was not detected and no violations are open. No PFAS was detected.
Graded on violations, lead, and PFAS, with state inspection findings.
| Contaminant | Type | Measured | Limit | Period | Status |
|---|---|---|---|---|---|
| Revised Total Coliform Rule | MONITORING FAILURE | — | — | 2025 | Resolved |
| Chlorine | MONITORING AND REPORTING | — | 4.0 mg/L | 2025 | Archived |
| Revised Total Coliform Rule | MCL EXCEEDANCE | — | — | 2025 | Resolved |
| Public Notice | OTHER | — | — | 2025 | Resolved |
| Public Notice | OTHER | — | — | 2025 | Resolved |
| Public Notice | OTHER | — | — | 2025 | Resolved |
| Public Notice | OTHER | — | — | 2025 | Resolved |
| TTHM | MONITORING AND REPORTING | — | 0.080 mg/L | 2024 | Resolved |
| Total Haloacetic Acids (HAA5) | MONITORING AND REPORTING | — | 0.060 mg/L | 2024 | Resolved |
| Gross Alpha, Excl. Radon and U | MONITORING AND REPORTING | — | 15 pCi/L | 2023 | Resolved |
| Combined Uranium | MONITORING AND REPORTING | — | 30 ug/L | 2023 | Resolved |
| Combined Radium (-226 and -228) | MONITORING AND REPORTING | — | 5 pCi/L | 2023 | Resolved |
| Radium-226 | MONITORING AND REPORTING | — | — | 2023 | Resolved |
| Radium-228 | MONITORING AND REPORTING | — | — | 2023 | Resolved |
| Revised Total Coliform Rule | MONITORING FAILURE | — | — | 2023 | Resolved |
| Radium-228 | MONITORING AND REPORTING | — | — | 2023 | Resolved |
| Gross Alpha, Excl. Radon and U | MONITORING AND REPORTING | — | 15 pCi/L | 2023 | Resolved |
| Combined Radium (-226 and -228) | MONITORING AND REPORTING | — | 5 pCi/L | 2023 | Resolved |
| Radium-226 | MONITORING AND REPORTING | — | — | 2023 | Resolved |
| TTHM | MONITORING AND REPORTING | — | 0.080 mg/L | 2021 | Resolved |
| Total Haloacetic Acids (HAA5) | MONITORING AND REPORTING | — | 0.060 mg/L | 2021 | Resolved |
| Arsenic | MONITORING AND REPORTING | — | 0.010 mg/L | 2021–2023 | Resolved |
| Barium | MONITORING AND REPORTING | — | 2 mg/L | 2021–2023 | Resolved |
| Cadmium | MONITORING AND REPORTING | — | 0.005 mg/L | 2021–2023 | Resolved |
| Chromium | MONITORING AND REPORTING | — | 0.1 mg/L | 2021–2023 | Resolved |
| CYANIDE | MONITORING AND REPORTING | — | 0.2 mg/L | 2021–2023 | Resolved |
| Fluoride | MONITORING AND REPORTING | — | 4.0 mg/L | 2021–2023 | Resolved |
| Mercury | MONITORING AND REPORTING | — | 0.002 mg/L | 2021–2023 | Resolved |
| Nickel | MONITORING AND REPORTING | — | — | 2021–2023 | Resolved |
| Antimony, Total | MONITORING AND REPORTING | — | 0.006 mg/L | 2021–2023 | Resolved |
| Beryllium, Total | MONITORING AND REPORTING | — | 0.004 mg/L | 2021–2023 | Resolved |
| Thallium, Total | MONITORING AND REPORTING | — | 0.002 mg/L | 2021–2023 | Resolved |
| Selenium | MONITORING AND REPORTING | — | 0.05 mg/L | 2021–2023 | Resolved |
| Endrin | MONITORING AND REPORTING | — | 0.002 mg/L | 2021–2023 | Resolved |
| BHC-GAMMA | MONITORING AND REPORTING | — | 0.0002 mg/L | 2021–2023 | Resolved |
| Methoxychlor | MONITORING AND REPORTING | — | 0.04 mg/L | 2021–2023 | Resolved |
| Toxaphene | MONITORING AND REPORTING | — | 0.003 mg/L | 2021–2023 | Resolved |
| Dalapon | MONITORING AND REPORTING | — | 0.2 mg/L | 2021–2023 | Resolved |
| Diquat | MONITORING AND REPORTING | — | 0.02 mg/L | 2021–2023 | Resolved |
| Endothall | MONITORING AND REPORTING | — | 0.1 mg/L | 2021–2023 | Resolved |
| Glyphosate | MONITORING AND REPORTING | — | 0.7 mg/L | 2021–2023 | Resolved |
| Di(2-ethylhexyl) adipate | MONITORING AND REPORTING | — | 0.4 mg/L | 2021–2023 | Resolved |
| OXAMYL | MONITORING AND REPORTING | — | 0.2 mg/L | 2021–2023 | Resolved |
| Simazine | MONITORING AND REPORTING | — | 0.004 mg/L | 2021–2023 | Resolved |
| Di(2-ethylhexyl) phthalate | MONITORING AND REPORTING | — | 0.006 mg/L | 2021–2023 | Resolved |
| Picloram | MONITORING AND REPORTING | — | 0.5 mg/L | 2021–2023 | Resolved |
| Dinoseb | MONITORING AND REPORTING | — | 0.007 mg/L | 2021–2023 | Resolved |
| Hexachlorocyclopentadiene | MONITORING AND REPORTING | — | 0.05 mg/L | 2021–2023 | Resolved |
| Carbofuran | MONITORING AND REPORTING | — | 0.04 mg/L | 2021–2023 | Resolved |
| Atrazine | MONITORING AND REPORTING | — | 0.003 mg/L | 2021–2023 | Resolved |
| LASSO | MONITORING AND REPORTING | — | — | 2021–2023 | Resolved |
| 2,3,7,8-TCDD | MONITORING AND REPORTING | — | 0.00000003 mg/L | 2021–2023 | Resolved |
| Heptachlor | MONITORING AND REPORTING | — | 0.0004 mg/L | 2021–2023 | Resolved |
| Heptachlor epoxide | MONITORING AND REPORTING | — | 0.0002 mg/L | 2021–2023 | Resolved |
| 2,4-D | MONITORING AND REPORTING | — | 0.07 mg/L | 2021–2023 | Resolved |
| 2,4,5-TP | MONITORING AND REPORTING | — | 0.05 mg/L | 2021–2023 | Resolved |
| HEXACHLOROBENZENE | MONITORING AND REPORTING | — | 0.001 mg/L | 2021–2023 | Resolved |
| Benzo(a)pyrene | MONITORING AND REPORTING | — | 0.0002 mg/L | 2021–2023 | Resolved |
| Pentachlorophenol | MONITORING AND REPORTING | — | 0.001 mg/L | 2021–2023 | Resolved |
| 1,2-DIBROMO-3-CHLOROPROPANE | MONITORING AND REPORTING | — | 0.0002 mg/L | 2021–2023 | Resolved |
| ETHYLENE DIBROMIDE | MONITORING AND REPORTING | — | 0.00005 mg/L | 2021–2023 | Resolved |
| Chlordane | MONITORING AND REPORTING | — | 0.002 mg/L | 2021–2023 | Resolved |
| Arsenic | MONITORING AND REPORTING | — | 0.010 mg/L | 2021–2023 | Resolved |
| Barium | MONITORING AND REPORTING | — | 2 mg/L | 2021–2023 | Resolved |
| Cadmium | MONITORING AND REPORTING | — | 0.005 mg/L | 2021–2023 | Resolved |
| Chromium | MONITORING AND REPORTING | — | 0.1 mg/L | 2021–2023 | Resolved |
| CYANIDE | MONITORING AND REPORTING | — | 0.2 mg/L | 2021–2023 | Resolved |
| Fluoride | MONITORING AND REPORTING | — | 4.0 mg/L | 2021–2023 | Resolved |
| Mercury | MONITORING AND REPORTING | — | 0.002 mg/L | 2021–2023 | Resolved |
| Nickel | MONITORING AND REPORTING | — | — | 2021–2023 | Resolved |
| Antimony, Total | MONITORING AND REPORTING | — | 0.006 mg/L | 2021–2023 | Resolved |
| Beryllium, Total | MONITORING AND REPORTING | — | 0.004 mg/L | 2021–2023 | Resolved |
| Thallium, Total | MONITORING AND REPORTING | — | 0.002 mg/L | 2021–2023 | Resolved |
| Selenium | MONITORING AND REPORTING | — | 0.05 mg/L | 2021–2023 | Resolved |
| Gross Alpha, Excl. Radon and U | MONITORING AND REPORTING | — | 15 pCi/L | 2020–2022 | Resolved |
| Chlorine | MONITORING AND REPORTING | — | 4.0 mg/L | 2019 | Resolved |
| Consumer Confidence Rule | OTHER | — | — | 2016 | Resolved |
| Consumer Confidence Rule | OTHER | — | — | 2015 | Resolved |
| Coliform (TCR) | MCL EXCEEDANCE | — | 5% of samples | 2015 | Resolved |