Water quality report for San Carlos, AZ — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.
A look at San Carlos's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.
Lead is 5.00 ppb, 33% of the action level. No PFAS was detected.
Graded on violations, lead, and PFAS, with state inspection findings.
| Contaminant | Type | Measured | Limit | Period | Status |
|---|---|---|---|---|---|
| Revised Total Coliform Rule | TREATMENT TECHNIQUE | — | — | 2026 | Unaddressed |
| Revised Total Coliform Rule | TREATMENT TECHNIQUE | — | — | 2026 | Unaddressed |
| Revised Total Coliform Rule | TREATMENT TECHNIQUE | — | — | 2025 | Unaddressed |
| Groundwater Rule | TREATMENT TECHNIQUE | — | — | 2025 | Unaddressed |
| Groundwater Rule | TREATMENT TECHNIQUE | — | — | 2025 | Unaddressed |
| Revised Total Coliform Rule | MCL EXCEEDANCE | — | — | 2025 | Resolved |
| Groundwater Rule | TREATMENT TECHNIQUE | — | — | 2025 | Unaddressed |
| Groundwater Rule | TREATMENT TECHNIQUE | — | — | 2025 | Unaddressed |
| Groundwater Rule | TREATMENT TECHNIQUE | — | — | 2025 | Unaddressed |
| Groundwater Rule | TREATMENT TECHNIQUE | — | — | 2025 | Unaddressed |
| Groundwater Rule | TREATMENT TECHNIQUE | — | — | 2025 | Unaddressed |
| Chlorine | MONITORING AND REPORTING | — | 4.0 mg/L | 2025 | Resolved |
| Revised Total Coliform Rule | MONITORING FAILURE | — | — | 2025 | Resolved |
| Chlorine | MONITORING AND REPORTING | — | 4.0 mg/L | 2025 | Archived |
| Nitrate | MONITORING AND REPORTING | — | 10 mg/L | 2025 | Archived |
| LEAD AND COPPER RULE REVISIONS | REPORTING FAILURE | — | — | 2024 | Unaddressed |
| Chlorine | MONITORING AND REPORTING | — | 4.0 mg/L | 2024 | Resolved |
| Gross Alpha, Excl. Radon and U | MONITORING AND REPORTING | — | 15 pCi/L | 2024 | Resolved |
| Combined Uranium | MONITORING AND REPORTING | — | 30 ug/L | 2024 | Resolved |
| Combined Radium (-226 and -228) | MONITORING AND REPORTING | — | 5 pCi/L | 2024 | Resolved |
| Chlorine | MONITORING AND REPORTING | — | 4.0 mg/L | 2024 | Resolved |
| Revised Total Coliform Rule | MONITORING FAILURE | — | — | 2024 | Resolved |
| Public Notice | OTHER | — | — | 2024 | Resolved |
| Arsenic | MONITORING AND REPORTING | — | 0.010 mg/L | 2024 | Resolved |
| Endrin | MONITORING AND REPORTING | — | 0.002 mg/L | 2024 | Resolved |
| BHC-GAMMA | MONITORING AND REPORTING | — | 0.0002 mg/L | 2024 | Resolved |
| Methoxychlor | MONITORING AND REPORTING | — | 0.04 mg/L | 2024 | Resolved |
| Toxaphene | MONITORING AND REPORTING | — | 0.003 mg/L | 2024 | Resolved |
| Dalapon | MONITORING AND REPORTING | — | 0.2 mg/L | 2024 | Resolved |
| Diquat | MONITORING AND REPORTING | — | 0.02 mg/L | 2024 | Resolved |
| Endothall | MONITORING AND REPORTING | — | 0.1 mg/L | 2024 | Resolved |
| Glyphosate | MONITORING AND REPORTING | — | 0.7 mg/L | 2024 | Resolved |
| Di(2-ethylhexyl) adipate | MONITORING AND REPORTING | — | 0.4 mg/L | 2024 | Resolved |
| OXAMYL | MONITORING AND REPORTING | — | 0.2 mg/L | 2024 | Resolved |
| Simazine | MONITORING AND REPORTING | — | 0.004 mg/L | 2024 | Resolved |
| Di(2-ethylhexyl) phthalate | MONITORING AND REPORTING | — | 0.006 mg/L | 2024 | Resolved |
| Picloram | MONITORING AND REPORTING | — | 0.5 mg/L | 2024 | Resolved |
| Dinoseb | MONITORING AND REPORTING | — | 0.007 mg/L | 2024 | Resolved |
| Hexachlorocyclopentadiene | MONITORING AND REPORTING | — | 0.05 mg/L | 2024 | Resolved |
| Carbofuran | MONITORING AND REPORTING | — | 0.04 mg/L | 2024 | Resolved |
| Atrazine | MONITORING AND REPORTING | — | 0.003 mg/L | 2024 | Resolved |
| LASSO | MONITORING AND REPORTING | — | — | 2024 | Resolved |
| 2,3,7,8-TCDD | MONITORING AND REPORTING | — | 0.00000003 mg/L | 2024 | Resolved |
| Heptachlor | MONITORING AND REPORTING | — | 0.0004 mg/L | 2024 | Resolved |
| Heptachlor epoxide | MONITORING AND REPORTING | — | 0.0002 mg/L | 2024 | Resolved |
| 2,4-D | MONITORING AND REPORTING | — | 0.07 mg/L | 2024 | Resolved |
| 2,4,5-TP | MONITORING AND REPORTING | — | 0.05 mg/L | 2024 | Resolved |
| HEXACHLOROBENZENE | MONITORING AND REPORTING | — | 0.001 mg/L | 2024 | Resolved |
| Benzo(a)pyrene | MONITORING AND REPORTING | — | 0.0002 mg/L | 2024 | Resolved |
| Pentachlorophenol | MONITORING AND REPORTING | — | 0.001 mg/L | 2024 | Resolved |
| 1,2,4-Trichlorobenzene | MONITORING AND REPORTING | — | 0.07 mg/L | 2024 | Resolved |
| cis-1,2-Dichloroethylene | MONITORING AND REPORTING | — | 0.07 mg/L | 2024 | Resolved |
| Total Polychlorinated Biphenyls (PCB) | MONITORING AND REPORTING | — | 0.0005 mg/L | 2024 | Resolved |
| 1,2-DIBROMO-3-CHLOROPROPANE | MONITORING AND REPORTING | — | 0.0002 mg/L | 2024 | Resolved |
| ETHYLENE DIBROMIDE | MONITORING AND REPORTING | — | 0.00005 mg/L | 2024 | Resolved |
| Xylenes, Total | MONITORING AND REPORTING | — | 10 mg/L | 2024 | Resolved |
| Chlordane | MONITORING AND REPORTING | — | 0.002 mg/L | 2024 | Resolved |
| DICHLOROMETHANE | MONITORING AND REPORTING | — | 0.005 mg/L | 2024 | Resolved |
| o-Dichlorobenzene | MONITORING AND REPORTING | — | 0.6 mg/L | 2024 | Resolved |
| p-Dichlorobenzene | MONITORING AND REPORTING | — | 0.075 mg/L | 2024 | Resolved |
| Vinyl chloride | MONITORING AND REPORTING | — | 0.002 mg/L | 2024 | Resolved |
| 1,1-Dichloroethylene | MONITORING AND REPORTING | — | 0.007 mg/L | 2024 | Resolved |
| trans-1,2-Dichloroethylene | MONITORING AND REPORTING | — | 0.1 mg/L | 2024 | Resolved |
| 1,2-Dichloroethane | MONITORING AND REPORTING | — | 0.005 mg/L | 2024 | Resolved |
| 1,1,1-Trichloroethane | MONITORING AND REPORTING | — | 0.2 mg/L | 2024 | Resolved |
| Carbon tetrachloride | MONITORING AND REPORTING | — | 0.005 mg/L | 2024 | Resolved |
| 1,2-Dichloropropane | MONITORING AND REPORTING | — | 0.005 mg/L | 2024 | Resolved |
| Trichloroethylene | MONITORING AND REPORTING | — | 0.005 mg/L | 2024 | Resolved |
| 1,1,2-Trichloroethane | MONITORING AND REPORTING | — | 0.005 mg/L | 2024 | Resolved |
| Tetrachloroethylene | MONITORING AND REPORTING | — | 0.005 mg/L | 2024 | Resolved |
| CHLOROBENZENE | MONITORING AND REPORTING | — | 0.1 mg/L | 2024 | Resolved |
| Benzene | MONITORING AND REPORTING | — | 0.005 mg/L | 2024 | Resolved |
| Toluene | MONITORING AND REPORTING | — | 1 mg/L | 2024 | Resolved |
| Ethylbenzene | MONITORING AND REPORTING | — | 0.7 mg/L | 2024 | Resolved |
| Styrene | MONITORING AND REPORTING | — | 0.1 mg/L | 2024 | Resolved |
| Gross Alpha, Excl. Radon and U | MONITORING AND REPORTING | — | 15 pCi/L | 2024 | Resolved |
| Combined Uranium | MONITORING AND REPORTING | — | 30 ug/L | 2024 | Resolved |
| Combined Radium (-226 and -228) | MONITORING AND REPORTING | — | 5 pCi/L | 2024 | Resolved |
| Chlorine | MONITORING AND REPORTING | — | 4.0 mg/L | 2024 | Resolved |
| Revised Total Coliform Rule | MONITORING FAILURE | — | — | 2024 | Resolved |
| Public Notice | OTHER | — | — | 2024 | Resolved |
| Chlorine | MONITORING AND REPORTING | — | 4.0 mg/L | 2023 | Resolved |
| Revised Total Coliform Rule | MCL EXCEEDANCE | — | — | 2023 | Resolved |
| Chlorine | MONITORING AND REPORTING | — | 4.0 mg/L | 2023 | Resolved |
| Revised Total Coliform Rule | MCL EXCEEDANCE | — | — | 2023 | Resolved |
| Revised Total Coliform Rule | TREATMENT TECHNIQUE | — | — | 2023 | Resolved |
| Revised Total Coliform Rule | MCL EXCEEDANCE | — | — | 2023 | Resolved |
| Revised Total Coliform Rule | MONITORING FAILURE | — | — | 2023 | Resolved |
| Chlorine | MONITORING AND REPORTING | — | 4.0 mg/L | 2023 | Resolved |
| Revised Total Coliform Rule | MONITORING FAILURE | — | — | 2023 | Resolved |
| Public Notice | OTHER | — | — | 2023 | Resolved |
| Groundwater Rule | TREATMENT TECHNIQUE | — | — | 2023 | Resolved |
| Groundwater Rule | TREATMENT TECHNIQUE | — | — | 2023 | Resolved |
| Groundwater Rule | TREATMENT TECHNIQUE | — | — | 2023 | Resolved |
| Groundwater Rule | TREATMENT TECHNIQUE | — | — | 2023 | Resolved |
| Groundwater Rule | TREATMENT TECHNIQUE | — | — | 2023 | Resolved |
| Groundwater Rule | TREATMENT TECHNIQUE | — | — | 2023 | Resolved |
| Public Notice | OTHER | — | — | 2023 | Resolved |
| Public Notice | OTHER | — | — | 2023 | Resolved |
| Public Notice | OTHER | — | — | 2023 | Resolved |
| Public Notice | OTHER | — | — | 2023 | Resolved |
| Public Notice | OTHER | — | — | 2023 | Resolved |
| Public Notice | OTHER | — | — | 2023 | Resolved |
| Revised Total Coliform Rule | REPORTING FAILURE | — | — | 2023 | Resolved |
| Chlorine | MONITORING AND REPORTING | — | 4.0 mg/L | 2023 | Resolved |
| Total Haloacetic Acids (HAA5) | MONITORING AND REPORTING | — | 0.060 mg/L | 2023 | Resolved |
| TTHM | MONITORING AND REPORTING | — | 0.080 mg/L | 2023 | Resolved |
| Lead and Copper Rule | MONITORING AND REPORTING | — | TT | 2023 | Unaddressed |
| E. COLI | MONITORING AND REPORTING | — | 0 | 2022 | Resolved |
| Revised Total Coliform Rule | MONITORING FAILURE | — | — | 2022 | Resolved |
| Revised Total Coliform Rule | REPORTING FAILURE | — | — | 2022 | Resolved |
| Arsenic | MONITORING AND REPORTING | — | 0.010 mg/L | 2022 | Resolved |
| Consumer Confidence Rule | OTHER | — | — | 2022 | Resolved |
| E. COLI | MONITORING AND REPORTING | — | 0 | 2022 | Resolved |
| Chlorine | MONITORING AND REPORTING | — | 4.0 mg/L | 2022 | Resolved |
| E. COLI | MONITORING AND REPORTING | — | 0 | 2021 | Resolved |
| E. COLI | MONITORING AND REPORTING | — | 0 | 2021 | Resolved |
| E. COLI | MONITORING AND REPORTING | — | 0 | 2021 | Resolved |
| Revised Total Coliform Rule | MONITORING FAILURE | — | — | 2021 | Resolved |
| Revised Total Coliform Rule | MCL EXCEEDANCE | — | — | 2021 | Resolved |
| E. COLI | MONITORING AND REPORTING | — | 0 | 2021 | Resolved |
| Public Notice | OTHER | — | — | 2021 | Resolved |
| E. COLI | MONITORING AND REPORTING | — | 0 | 2020 | Resolved |
| E. COLI | MONITORING AND REPORTING | — | 0 | 2020 | Resolved |
| Revised Total Coliform Rule | REPORTING FAILURE | — | — | 2019 | Resolved |
| Arsenic | MONITORING AND REPORTING | — | 0.010 mg/L | 2019 | Resolved |
| Nitrate | MONITORING AND REPORTING | — | 10 mg/L | 2019 | Resolved |
| Revised Total Coliform Rule | REPORTING FAILURE | — | — | 2019 | Resolved |
| Revised Total Coliform Rule | REPORTING FAILURE | — | — | 2018 | Resolved |
| Revised Total Coliform Rule | MONITORING FAILURE | — | — | 2018 | Resolved |
| Arsenic | MONITORING AND REPORTING | — | 0.010 mg/L | 2018 | Resolved |
| Revised Total Coliform Rule | REPORTING FAILURE | — | — | 2018 | Resolved |
| Revised Total Coliform Rule | TREATMENT TECHNIQUE | — | — | 2018 | Resolved |
| Public Notice | OTHER | — | — | 2018 | Resolved |
| Revised Total Coliform Rule | REPORTING FAILURE | — | — | 2018 | Resolved |
| Revised Total Coliform Rule | MCL EXCEEDANCE | — | — | 2018 | Resolved |
| E. COLI | MONITORING AND REPORTING | — | 0 | 2018 | Resolved |
| Public Notice | OTHER | — | — | 2018 | Resolved |
| Revised Total Coliform Rule | TREATMENT TECHNIQUE | — | — | 2018 | Resolved |
| Public Notice | OTHER | — | — | 2018 | Resolved |
| Public Notice | OTHER | — | — | 2018 | Resolved |
| E. COLI | MONITORING AND REPORTING | — | 0 | 2018 | Resolved |
| Revised Total Coliform Rule | REPORTING FAILURE | — | — | 2018 | Resolved |
| Arsenic | MONITORING AND REPORTING | — | 0.010 mg/L | 2018 | Resolved |
| Revised Total Coliform Rule | MCL EXCEEDANCE | — | — | 2018 | Resolved |
| E. COLI | MONITORING AND REPORTING | — | 0 | 2018 | Resolved |
| Arsenic | MONITORING AND REPORTING | — | 0.010 mg/L | 2018 | Resolved |
| Nitrate | MONITORING AND REPORTING | — | 10 mg/L | 2018 | Resolved |
| Arsenic | MONITORING AND REPORTING | — | 0.010 mg/L | 2017 | Resolved |
| Revised Total Coliform Rule | TREATMENT TECHNIQUE | — | — | 2017 | Resolved |
| Consumer Confidence Rule | OTHER | — | — | 2017 | Resolved |
| Arsenic | MCL EXCEEDANCE | 0.0073 MG/L | 0.010 mg/L | 2016 | Resolved |
| Coliform (TCR) | MCL EXCEEDANCE | — | 5% of samples | 2016 | Resolved |
| Coliform (TCR) | MONITORING AND REPORTING | — | 5% of samples | 2016 | Resolved |
| E. COLI | MONITORING AND REPORTING | — | 0 | 2016 | Resolved |
| Arsenic | MCL EXCEEDANCE | 0.0176 MG/L | 0.010 mg/L | 2016 | Resolved |
| Total Haloacetic Acids (HAA5) | MONITORING AND REPORTING | — | 0.060 mg/L | 2016 | Resolved |
| TTHM | MONITORING AND REPORTING | — | 0.080 mg/L | 2016 | Resolved |
| Public Notice | OTHER | — | — | 2016 | Resolved |
| Coliform (TCR) | MONITORING AND REPORTING | — | 5% of samples | 2015 | Resolved |
| Coliform (TCR) | MCL EXCEEDANCE | — | 5% of samples | 2015 | Resolved |
| Public Notice | OTHER | — | — | 2015 | Resolved |
| Arsenic | MCL EXCEEDANCE | 0.0102 MG/L | 0.010 mg/L | 2015 | Resolved |
| Arsenic | MONITORING AND REPORTING | — | 0.010 mg/L | 2015 | Resolved |
| Coliform (TCR) | MONITORING AND REPORTING | — | 5% of samples | 2015 | Resolved |
| Consumer Confidence Rule | OTHER | — | — | 2015 | Resolved |
| Public Notice | OTHER | — | — | 2015 | Resolved |
| Arsenic | MCL EXCEEDANCE | 0.0102 MG/L | 0.010 mg/L | 2015 | Resolved |
| Arsenic | MONITORING AND REPORTING | — | 0.010 mg/L | 2015 | Resolved |
| Public Notice | OTHER | — | — | 2015 | Resolved |
| Arsenic | MCL EXCEEDANCE | 0.0102 MG/L | 0.010 mg/L | 2015 | Resolved |
| Coliform (TCR) | MONITORING AND REPORTING | — | 5% of samples | 2015 | Resolved |
| Public Notice | OTHER | — | — | 2015 | Resolved |