Water quality report for Madison, CA — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.
A look at Madison's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.
Lead was not detected. PFAS has never been sampled at this system.
Graded on violations and lead, with state inspection findings. PFAS not tested.
| Contaminant | Type | Measured | Limit | Period | Status |
|---|---|---|---|---|---|
| Arsenic | MONITORING AND REPORTING | — | 0.010 mg/L | 2025 | Archived |
| Barium | MONITORING AND REPORTING | — | 2 mg/L | 2025 | Archived |
| Cadmium | MONITORING AND REPORTING | — | 0.005 mg/L | 2025 | Archived |
| Chromium | MONITORING AND REPORTING | — | 0.1 mg/L | 2025 | Archived |
| Fluoride | MONITORING AND REPORTING | — | 4.0 mg/L | 2025 | Archived |
| Mercury | MONITORING AND REPORTING | — | 0.002 mg/L | 2025 | Archived |
| Nickel | MONITORING AND REPORTING | — | — | 2025 | Archived |
| Nitrite | MONITORING AND REPORTING | — | 1 mg/L | 2025 | Archived |
| Antimony, Total | MONITORING AND REPORTING | — | 0.006 mg/L | 2025 | Archived |
| Beryllium, Total | MONITORING AND REPORTING | — | 0.004 mg/L | 2025 | Archived |
| Thallium, Total | MONITORING AND REPORTING | — | 0.002 mg/L | 2025 | Archived |
| Selenium | MONITORING AND REPORTING | — | 0.05 mg/L | 2025 | Archived |
| 1,2,4-Trichlorobenzene | MONITORING AND REPORTING | — | 0.07 mg/L | 2025 | Archived |
| cis-1,2-Dichloroethylene | MONITORING AND REPORTING | — | 0.07 mg/L | 2025 | Archived |
| Xylenes, Total | MONITORING AND REPORTING | — | 10 mg/L | 2025 | Archived |
| DICHLOROMETHANE | MONITORING AND REPORTING | — | 0.005 mg/L | 2025 | Archived |
| o-Dichlorobenzene | MONITORING AND REPORTING | — | 0.6 mg/L | 2025 | Archived |
| p-Dichlorobenzene | MONITORING AND REPORTING | — | 0.075 mg/L | 2025 | Archived |
| Vinyl chloride | MONITORING AND REPORTING | — | 0.002 mg/L | 2025 | Archived |
| 1,1-Dichloroethylene | MONITORING AND REPORTING | — | 0.007 mg/L | 2025 | Archived |
| trans-1,2-Dichloroethylene | MONITORING AND REPORTING | — | 0.1 mg/L | 2025 | Archived |
| 1,2-Dichloroethane | MONITORING AND REPORTING | — | 0.005 mg/L | 2025 | Archived |
| 1,1,1-Trichloroethane | MONITORING AND REPORTING | — | 0.2 mg/L | 2025 | Archived |
| Carbon tetrachloride | MONITORING AND REPORTING | — | 0.005 mg/L | 2025 | Archived |
| 1,2-Dichloropropane | MONITORING AND REPORTING | — | 0.005 mg/L | 2025 | Archived |
| Trichloroethylene | MONITORING AND REPORTING | — | 0.005 mg/L | 2025 | Archived |
| 1,1,2-Trichloroethane | MONITORING AND REPORTING | — | 0.005 mg/L | 2025 | Archived |
| Tetrachloroethylene | MONITORING AND REPORTING | — | 0.005 mg/L | 2025 | Archived |
| CHLOROBENZENE | MONITORING AND REPORTING | — | 0.1 mg/L | 2025 | Archived |
| Benzene | MONITORING AND REPORTING | — | 0.005 mg/L | 2025 | Archived |
| Toluene | MONITORING AND REPORTING | — | 1 mg/L | 2025 | Archived |
| Ethylbenzene | MONITORING AND REPORTING | — | 0.7 mg/L | 2025 | Archived |
| Styrene | MONITORING AND REPORTING | — | 0.1 mg/L | 2025 | Archived |
| Endrin | MONITORING AND REPORTING | — | 0.002 mg/L | 2025 | Archived |
| BHC-GAMMA | MONITORING AND REPORTING | — | 0.0002 mg/L | 2025 | Archived |
| Methoxychlor | MONITORING AND REPORTING | — | 0.04 mg/L | 2025 | Archived |
| Toxaphene | MONITORING AND REPORTING | — | 0.003 mg/L | 2025 | Archived |
| Dalapon | MONITORING AND REPORTING | — | 0.2 mg/L | 2025 | Archived |
| Diquat | MONITORING AND REPORTING | — | 0.02 mg/L | 2025 | Archived |
| Endothall | MONITORING AND REPORTING | — | 0.1 mg/L | 2025 | Archived |
| Glyphosate | MONITORING AND REPORTING | — | 0.7 mg/L | 2025 | Archived |
| Di(2-ethylhexyl) adipate | MONITORING AND REPORTING | — | 0.4 mg/L | 2025 | Archived |
| OXAMYL | MONITORING AND REPORTING | — | 0.2 mg/L | 2025 | Archived |
| Simazine | MONITORING AND REPORTING | — | 0.004 mg/L | 2025 | Archived |
| Di(2-ethylhexyl) phthalate | MONITORING AND REPORTING | — | 0.006 mg/L | 2025 | Archived |
| Picloram | MONITORING AND REPORTING | — | 0.5 mg/L | 2025 | Archived |
| Dinoseb | MONITORING AND REPORTING | — | 0.007 mg/L | 2025 | Archived |
| Hexachlorocyclopentadiene | MONITORING AND REPORTING | — | 0.05 mg/L | 2025 | Archived |
| Carbofuran | MONITORING AND REPORTING | — | 0.04 mg/L | 2025 | Archived |
| Atrazine | MONITORING AND REPORTING | — | 0.003 mg/L | 2025 | Archived |
| LASSO | MONITORING AND REPORTING | — | — | 2025 | Archived |
| 2,3,7,8-TCDD | MONITORING AND REPORTING | — | 0.00000003 mg/L | 2025 | Archived |
| Heptachlor | MONITORING AND REPORTING | — | 0.0004 mg/L | 2025 | Archived |
| Heptachlor epoxide | MONITORING AND REPORTING | — | 0.0002 mg/L | 2025 | Archived |
| 2,4-D | MONITORING AND REPORTING | — | 0.07 mg/L | 2025 | Archived |
| 2,4,5-TP | MONITORING AND REPORTING | — | 0.05 mg/L | 2025 | Archived |
| HEXACHLOROBENZENE | MONITORING AND REPORTING | — | 0.001 mg/L | 2025 | Archived |
| Benzo(a)pyrene | MONITORING AND REPORTING | — | 0.0002 mg/L | 2025 | Archived |
| Pentachlorophenol | MONITORING AND REPORTING | — | 0.001 mg/L | 2025 | Archived |
| Total Polychlorinated Biphenyls (PCB) | MONITORING AND REPORTING | — | 0.0005 mg/L | 2025 | Archived |
| 1,2-DIBROMO-3-CHLOROPROPANE | MONITORING AND REPORTING | — | 0.0002 mg/L | 2025 | Archived |
| ETHYLENE DIBROMIDE | MONITORING AND REPORTING | — | 0.00005 mg/L | 2025 | Archived |
| Chlordane | MONITORING AND REPORTING | — | 0.002 mg/L | 2025 | Archived |
| LEAD AND COPPER RULE REVISIONS | TREATMENT TECHNIQUE | — | — | 2024 | Unaddressed |
| LEAD AND COPPER RULE REVISIONS | REPORTING FAILURE | — | — | 2024 | Unaddressed |
| Revised Total Coliform Rule | MONITORING FAILURE | — | — | 2024 | Resolved |
| 1,2,4-Trichlorobenzene | MONITORING AND REPORTING | — | 0.07 mg/L | 2023–2025 | Archived |
| cis-1,2-Dichloroethylene | MONITORING AND REPORTING | — | 0.07 mg/L | 2023–2025 | Archived |
| Xylenes, Total | MONITORING AND REPORTING | — | 10 mg/L | 2023–2025 | Archived |
| DICHLOROMETHANE | MONITORING AND REPORTING | — | 0.005 mg/L | 2023–2025 | Archived |
| o-Dichlorobenzene | MONITORING AND REPORTING | — | 0.6 mg/L | 2023–2025 | Archived |
| p-Dichlorobenzene | MONITORING AND REPORTING | — | 0.075 mg/L | 2023–2025 | Archived |
| Vinyl chloride | MONITORING AND REPORTING | — | 0.002 mg/L | 2023–2025 | Archived |
| 1,1-Dichloroethylene | MONITORING AND REPORTING | — | 0.007 mg/L | 2023–2025 | Archived |
| trans-1,2-Dichloroethylene | MONITORING AND REPORTING | — | 0.1 mg/L | 2023–2025 | Archived |
| 1,2-Dichloroethane | MONITORING AND REPORTING | — | 0.005 mg/L | 2023–2025 | Archived |
| 1,1,1-Trichloroethane | MONITORING AND REPORTING | — | 0.2 mg/L | 2023–2025 | Archived |
| Carbon tetrachloride | MONITORING AND REPORTING | — | 0.005 mg/L | 2023–2025 | Archived |
| 1,2-Dichloropropane | MONITORING AND REPORTING | — | 0.005 mg/L | 2023–2025 | Archived |
| Trichloroethylene | MONITORING AND REPORTING | — | 0.005 mg/L | 2023–2025 | Archived |
| 1,1,2-Trichloroethane | MONITORING AND REPORTING | — | 0.005 mg/L | 2023–2025 | Archived |
| Tetrachloroethylene | MONITORING AND REPORTING | — | 0.005 mg/L | 2023–2025 | Archived |
| CHLOROBENZENE | MONITORING AND REPORTING | — | 0.1 mg/L | 2023–2025 | Archived |
| Benzene | MONITORING AND REPORTING | — | 0.005 mg/L | 2023–2025 | Archived |
| Toluene | MONITORING AND REPORTING | — | 1 mg/L | 2023–2025 | Archived |
| Ethylbenzene | MONITORING AND REPORTING | — | 0.7 mg/L | 2023–2025 | Archived |
| Styrene | MONITORING AND REPORTING | — | 0.1 mg/L | 2023–2025 | Archived |
| Endrin | MONITORING AND REPORTING | — | 0.002 mg/L | 2023–2025 | Archived |
| BHC-GAMMA | MONITORING AND REPORTING | — | 0.0002 mg/L | 2023–2025 | Archived |
| Methoxychlor | MONITORING AND REPORTING | — | 0.04 mg/L | 2023–2025 | Archived |
| Toxaphene | MONITORING AND REPORTING | — | 0.003 mg/L | 2023–2025 | Archived |
| Dalapon | MONITORING AND REPORTING | — | 0.2 mg/L | 2023–2025 | Archived |
| Diquat | MONITORING AND REPORTING | — | 0.02 mg/L | 2023–2025 | Archived |
| Endothall | MONITORING AND REPORTING | — | 0.1 mg/L | 2023–2025 | Archived |
| Glyphosate | MONITORING AND REPORTING | — | 0.7 mg/L | 2023–2025 | Archived |
| Di(2-ethylhexyl) adipate | MONITORING AND REPORTING | — | 0.4 mg/L | 2023–2025 | Archived |
| OXAMYL | MONITORING AND REPORTING | — | 0.2 mg/L | 2023–2025 | Archived |
| Simazine | MONITORING AND REPORTING | — | 0.004 mg/L | 2023–2025 | Archived |
| Di(2-ethylhexyl) phthalate | MONITORING AND REPORTING | — | 0.006 mg/L | 2023–2025 | Archived |
| Picloram | MONITORING AND REPORTING | — | 0.5 mg/L | 2023–2025 | Archived |
| Dinoseb | MONITORING AND REPORTING | — | 0.007 mg/L | 2023–2025 | Archived |
| Hexachlorocyclopentadiene | MONITORING AND REPORTING | — | 0.05 mg/L | 2023–2025 | Archived |
| Carbofuran | MONITORING AND REPORTING | — | 0.04 mg/L | 2023–2025 | Archived |
| Atrazine | MONITORING AND REPORTING | — | 0.003 mg/L | 2023–2025 | Archived |
| LASSO | MONITORING AND REPORTING | — | — | 2023–2025 | Archived |
| 2,3,7,8-TCDD | MONITORING AND REPORTING | — | 0.00000003 mg/L | 2023–2025 | Archived |
| Heptachlor | MONITORING AND REPORTING | — | 0.0004 mg/L | 2023–2025 | Archived |
| Heptachlor epoxide | MONITORING AND REPORTING | — | 0.0002 mg/L | 2023–2025 | Archived |
| 2,4-D | MONITORING AND REPORTING | — | 0.07 mg/L | 2023–2025 | Archived |
| 2,4,5-TP | MONITORING AND REPORTING | — | 0.05 mg/L | 2023–2025 | Archived |
| HEXACHLOROBENZENE | MONITORING AND REPORTING | — | 0.001 mg/L | 2023–2025 | Archived |
| Benzo(a)pyrene | MONITORING AND REPORTING | — | 0.0002 mg/L | 2023–2025 | Archived |
| Pentachlorophenol | MONITORING AND REPORTING | — | 0.001 mg/L | 2023–2025 | Archived |
| Total Polychlorinated Biphenyls (PCB) | MONITORING AND REPORTING | — | 0.0005 mg/L | 2023–2025 | Archived |
| 1,2-DIBROMO-3-CHLOROPROPANE | MONITORING AND REPORTING | — | 0.0002 mg/L | 2023–2025 | Archived |
| ETHYLENE DIBROMIDE | MONITORING AND REPORTING | — | 0.00005 mg/L | 2023–2025 | Archived |
| Chlordane | MONITORING AND REPORTING | — | 0.002 mg/L | 2023–2025 | Archived |
| Arsenic | MONITORING AND REPORTING | — | 0.010 mg/L | 2023–2025 | Archived |
| Barium | MONITORING AND REPORTING | — | 2 mg/L | 2023–2025 | Archived |
| Cadmium | MONITORING AND REPORTING | — | 0.005 mg/L | 2023–2025 | Archived |
| Chromium | MONITORING AND REPORTING | — | 0.1 mg/L | 2023–2025 | Archived |
| Fluoride | MONITORING AND REPORTING | — | 4.0 mg/L | 2023–2025 | Archived |
| Mercury | MONITORING AND REPORTING | — | 0.002 mg/L | 2023–2025 | Archived |
| Nickel | MONITORING AND REPORTING | — | — | 2023–2025 | Archived |
| Nitrite | MONITORING AND REPORTING | — | 1 mg/L | 2023–2025 | Archived |
| Antimony, Total | MONITORING AND REPORTING | — | 0.006 mg/L | 2023–2025 | Archived |
| Beryllium, Total | MONITORING AND REPORTING | — | 0.004 mg/L | 2023–2025 | Archived |
| Thallium, Total | MONITORING AND REPORTING | — | 0.002 mg/L | 2023–2025 | Archived |
| Selenium | MONITORING AND REPORTING | — | 0.05 mg/L | 2023–2025 | Archived |
| Nitrate | MONITORING AND REPORTING | — | 10 mg/L | 2020 | Resolved |
| Nitrite | MONITORING AND REPORTING | — | 1 mg/L | 2020 | Resolved |
| Revised Total Coliform Rule | MONITORING FAILURE | — | — | 2018 | Resolved |
| TTHM | MONITORING AND REPORTING | — | 0.080 mg/L | 2018 | Resolved |
| Total Haloacetic Acids (HAA5) | MONITORING AND REPORTING | — | 0.060 mg/L | 2018 | Resolved |
| Lead and Copper Rule | MONITORING AND REPORTING | — | TT | 2017 | Resolved |
| Revised Total Coliform Rule | MONITORING FAILURE | — | — | 2017 | Resolved |
| COLIPHAGE | MONITORING AND REPORTING | — | — | 2017 | Resolved |
| Lead and Copper Rule | MONITORING AND REPORTING | — | TT | 2016 | Resolved |