Water Quality in COLUMBIA, CT (06237)
EPA violation data for public water systems serving ZIP code 06237.
288
Total Violations
7
Health-Based
281
Monitoring / Reporting
270
Resolved
What does this mean?
270 of 288 violations have been resolved. 7 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 281 are monitoring or reporting violations (missed testing deadlines or late paperwork — not necessarily a water quality issue). Not all violations mean your water is unsafe. The EPA requires reporting even for minor administrative issues.
Violations Detail (288 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Mar 31, 2025 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Oct 31, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Oct 31, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Oct 31, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Oct 31, 2024 | Resolved | N/A |
| LEAD AND COPPER RULE REVISIONS | Monitoring | N/A | N/A | Oct 16, 2024 | Active | N/A |
| LEAD AND COPPER RULE REVISIONS | Health-Based | N/A | N/A | Oct 16, 2024 | Active | N/A |
| LEAD AND COPPER RULE REVISIONS | Health-Based | N/A | N/A | Oct 16, 2024 | Active | N/A |
| LEAD AND COPPER RULE REVISIONS | Monitoring | N/A | N/A | Oct 16, 2024 | Active | N/A |
| LEAD AND COPPER RULE REVISIONS | Health-Based | N/A | N/A | Oct 16, 2024 | Active | N/A |
| LEAD AND COPPER RULE REVISIONS | Monitoring | N/A | N/A | Oct 16, 2024 | Active | N/A |
| Public Notice | Monitoring | N/A | N/A | Oct 10, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Oct 10, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Oct 10, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Oct 10, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Oct 10, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Oct 10, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Oct 9, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Oct 9, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Aug 2, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Aug 2, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Aug 2, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Aug 2, 2024 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 1, 2024 | Active | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 1, 2024 | Active | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 1, 2024 | Active | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 1, 2024 | Active | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 1, 2024 | Active | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 1, 2024 | Active | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 1, 2024 | Active | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 1, 2024 | Active | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 1, 2024 | Active | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Apr 30, 2024 | Active | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Apr 30, 2024 | Active | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Apr 30, 2024 | Active | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 30, 2024 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 30, 2024 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Dec 29, 2023 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Dec 29, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Oct 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Oct 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Oct 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Oct 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jul 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Jun 30, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 12, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 12, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 12, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 12, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 10, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 10, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 10, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 10, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 10, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 10, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Mar 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Mar 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Mar 31, 2023 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Mar 31, 2023 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 31, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Jan 14, 2023 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Jan 14, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Jan 14, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Jan 14, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Health-Based | N/A | N/A | Jan 14, 2023 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Dec 31, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Dec 31, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Dec 31, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Dec 31, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | Sep 30, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 28, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 28, 2022 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Aug 9, 2022 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Aug 9, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Consumer Confidence Rule | Monitoring | N/A | N/A | Jun 30, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 14, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 14, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 14, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 14, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 14, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 14, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 14, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 14, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 14, 2022 | Resolved | N/A |
| Revised Total Coliform Rule | Monitoring | N/A | N/A | May 14, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 31, 2022 | Resolved | N/A |
| p-Dichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2-Dichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Carbon tetrachloride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Carbon tetrachloride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Carbon tetrachloride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Trichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Trichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Trichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Trichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Tetrachloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Tetrachloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Tetrachloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Tetrachloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Nitrate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| 1,2-Dichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2-Dichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2,4-Trichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2,4-Trichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2,4-Trichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2,4-Trichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| cis-1,2-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| cis-1,2-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| cis-1,2-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| cis-1,2-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| DICHLOROMETHANE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| DICHLOROMETHANE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| DICHLOROMETHANE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| DICHLOROMETHANE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| o-Dichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| o-Dichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| o-Dichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| o-Dichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| p-Dichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2-Dichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| p-Dichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| p-Dichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2-Dichloropropane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2-Dichloropropane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2-Dichloropropane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2-Dichloropropane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| CHLOROBENZENE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| CHLOROBENZENE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| CHLOROBENZENE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| CHLOROBENZENE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Toluene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Toluene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Toluene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Toluene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Ethylbenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Ethylbenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Ethylbenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Ethylbenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Vinyl chloride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Increased risk of cancer |
| Vinyl chloride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Increased risk of cancer |
| trans-1,2-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| trans-1,2-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| trans-1,2-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| trans-1,2-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Vinyl chloride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Increased risk of cancer |
| Vinyl chloride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Increased risk of cancer |
| Benzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Anemia; decrease in blood platelets; increased risk of cancer |
| Benzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Anemia; decrease in blood platelets; increased risk of cancer |
| Benzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Anemia; decrease in blood platelets; increased risk of cancer |
| 1,1,1-Trichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1,1-Trichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1,1-Trichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1,1-Trichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1,2-Trichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1,2-Trichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1,2-Trichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1,2-Trichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Styrene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Styrene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Styrene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Styrene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Benzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Anemia; decrease in blood platelets; increased risk of cancer |
| Carbon tetrachloride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Vinyl chloride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Increased risk of cancer |
| p-Dichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| p-Dichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Vinyl chloride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Increased risk of cancer |
| p-Dichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| p-Dichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| cis-1,2-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| cis-1,2-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| cis-1,2-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| cis-1,2-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Vinyl chloride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Increased risk of cancer |
| Vinyl chloride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Increased risk of cancer |
| 1,1-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Carbon tetrachloride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Carbon tetrachloride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Carbon tetrachloride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Carbon tetrachloride | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Trichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Trichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Trichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Trichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Tetrachloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Tetrachloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Tetrachloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Tetrachloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Liver problems; increased risk of cancer |
| Benzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Anemia; decrease in blood platelets; increased risk of cancer |
| Benzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Anemia; decrease in blood platelets; increased risk of cancer |
| Benzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Anemia; decrease in blood platelets; increased risk of cancer |
| Benzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Anemia; decrease in blood platelets; increased risk of cancer |
| Nitrate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrate | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| Nitrite | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | Infants below the age of six months could become seriously ill (blue baby syndrome); shortness of breath |
| DICHLOROMETHANE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| DICHLOROMETHANE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| DICHLOROMETHANE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| DICHLOROMETHANE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| o-Dichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| o-Dichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| o-Dichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| o-Dichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| trans-1,2-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| trans-1,2-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| trans-1,2-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| trans-1,2-Dichloroethylene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2-Dichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2-Dichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2-Dichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2-Dichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| CHLOROBENZENE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| CHLOROBENZENE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| CHLOROBENZENE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| CHLOROBENZENE | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Toluene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Toluene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Toluene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Toluene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Ethylbenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Ethylbenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Ethylbenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Ethylbenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Styrene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Styrene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Styrene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Styrene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1,1-Trichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1,1-Trichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1,1-Trichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1,1-Trichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2,4-Trichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2,4-Trichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2,4-Trichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2,4-Trichlorobenzene | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2-Dichloropropane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2-Dichloropropane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2-Dichloropropane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,2-Dichloropropane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1,2-Trichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1,2-Trichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1,2-Trichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| 1,1,2-Trichloroethane | Monitoring | N/A | N/A | Dec 31, 2021 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 28, 2021 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Sep 28, 2021 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 31, 2021 | Resolved | N/A |
| Lead and Copper Rule | Monitoring | N/A | N/A | Mar 31, 2021 | Resolved | N/A |
Lead & Copper Levels
Violation Timeline
2025(1)
Revised Total Coliform Rule
3A
2024(36)
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
LEAD AND COPPER RULE REVISIONS
4G
LEAD AND COPPER RULE REVISIONS
2E
LEAD AND COPPER RULE REVISIONS
2E
LEAD AND COPPER RULE REVISIONS
4G
LEAD AND COPPER RULE REVISIONS
2E
LEAD AND COPPER RULE REVISIONS
4G
Public Notice
75
Public Notice
75
Public Notice
75
Public Notice
75
Public Notice
75
Public Notice
75
Public Notice
75
Public Notice
75
Revised Total Coliform Rule
4A
Revised Total Coliform Rule
4A
Revised Total Coliform Rule
4A
Revised Total Coliform Rule
4A
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Lead and Copper Rule
66
Lead and Copper Rule
66
2023(35)
Lead and Copper Rule
66
Lead and Copper Rule
66
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Revised Total Coliform Rule
3A
Lead and Copper Rule
66
Revised Total Coliform Rule
3A
Lead and Copper Rule
66
Revised Total Coliform Rule
2A
Public Notice
75
Revised Total Coliform Rule
2A
Revised Total Coliform Rule
2A
Revised Total Coliform Rule
2A
2022(36)
Revised Total Coliform Rule
3B
Revised Total Coliform Rule
3B
Revised Total Coliform Rule
3B
Revised Total Coliform Rule
3B
Revised Total Coliform Rule
3B
Revised Total Coliform Rule
3B
Revised Total Coliform Rule
3B
Revised Total Coliform Rule
3B
Revised Total Coliform Rule
3B
Revised Total Coliform Rule
3B
Revised Total Coliform Rule
3B
Revised Total Coliform Rule
3B
Lead and Copper Rule
66
Lead and Copper Rule
66
Consumer Confidence Rule
72
Consumer Confidence Rule
72
Lead and Copper Rule
56
Lead and Copper Rule
56
Lead and Copper Rule
56
Lead and Copper Rule
56
Consumer Confidence Rule
71
Consumer Confidence Rule
71
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Revised Total Coliform Rule
4C
Lead and Copper Rule
66
Lead and Copper Rule
66
Lead and Copper Rule
66
Lead and Copper Rule
66
2021(180)
p-Dichlorobenzene
03
1,2-Dichloroethane
03
Carbon tetrachloride
03
Carbon tetrachloride
03
Carbon tetrachloride
03
Trichloroethylene
03
Trichloroethylene
03
Trichloroethylene
03
Trichloroethylene
03
Tetrachloroethylene
03
Tetrachloroethylene
03
Tetrachloroethylene
03
Tetrachloroethylene
03
Nitrate
03
Nitrate
03
Nitrate
03
Nitrate
03
1,2-Dichloroethane
03
1,2-Dichloroethane
03
1,2,4-Trichlorobenzene
03
1,2,4-Trichlorobenzene
03
1,2,4-Trichlorobenzene
03
1,2,4-Trichlorobenzene
03
cis-1,2-Dichloroethylene
03
cis-1,2-Dichloroethylene
03
cis-1,2-Dichloroethylene
03
cis-1,2-Dichloroethylene
03
DICHLOROMETHANE
03
DICHLOROMETHANE
03
DICHLOROMETHANE
03
DICHLOROMETHANE
03
o-Dichlorobenzene
03
o-Dichlorobenzene
03
o-Dichlorobenzene
03
o-Dichlorobenzene
03
p-Dichlorobenzene
03
1,2-Dichloroethane
03
p-Dichlorobenzene
03
p-Dichlorobenzene
03
1,1-Dichloroethylene
03
1,1-Dichloroethylene
03
1,1-Dichloroethylene
03
1,1-Dichloroethylene
03
1,2-Dichloropropane
03
1,2-Dichloropropane
03
1,2-Dichloropropane
03
1,2-Dichloropropane
03
CHLOROBENZENE
03
CHLOROBENZENE
03
CHLOROBENZENE
03
CHLOROBENZENE
03
Toluene
03
Toluene
03
Toluene
03
Toluene
03
Ethylbenzene
03
Ethylbenzene
03
Ethylbenzene
03
Ethylbenzene
03
Vinyl chloride
03
Vinyl chloride
03
trans-1,2-Dichloroethylene
03
trans-1,2-Dichloroethylene
03
trans-1,2-Dichloroethylene
03
trans-1,2-Dichloroethylene
03
Vinyl chloride
03
Vinyl chloride
03
Benzene
03
Benzene
03
Benzene
03
1,1,1-Trichloroethane
03
1,1,1-Trichloroethane
03
1,1,1-Trichloroethane
03
1,1,1-Trichloroethane
03
1,1,2-Trichloroethane
03
1,1,2-Trichloroethane
03
1,1,2-Trichloroethane
03
1,1,2-Trichloroethane
03
Nitrite
03
Nitrite
03
Nitrite
03
Nitrite
03
Styrene
03
Styrene
03
Styrene
03
Styrene
03
Benzene
03
Carbon tetrachloride
03
Vinyl chloride
03
p-Dichlorobenzene
03
p-Dichlorobenzene
03
Vinyl chloride
03
p-Dichlorobenzene
03
p-Dichlorobenzene
03
cis-1,2-Dichloroethylene
03
cis-1,2-Dichloroethylene
03
cis-1,2-Dichloroethylene
03
cis-1,2-Dichloroethylene
03
Vinyl chloride
03
Vinyl chloride
03
1,1-Dichloroethylene
03
1,1-Dichloroethylene
03
1,1-Dichloroethylene
03
1,1-Dichloroethylene
03
Carbon tetrachloride
03
Carbon tetrachloride
03
Carbon tetrachloride
03
Carbon tetrachloride
03
Trichloroethylene
03
Trichloroethylene
03
Trichloroethylene
03
Trichloroethylene
03
Tetrachloroethylene
03
Tetrachloroethylene
03
Tetrachloroethylene
03
Tetrachloroethylene
03
Benzene
03
Benzene
03
Benzene
03
Benzene
03
Nitrate
03
Nitrate
03
Nitrate
03
Nitrate
03
Nitrite
03
Nitrite
03
Nitrite
03
Nitrite
03
DICHLOROMETHANE
03
DICHLOROMETHANE
03
DICHLOROMETHANE
03
DICHLOROMETHANE
03
o-Dichlorobenzene
03
o-Dichlorobenzene
03
o-Dichlorobenzene
03
o-Dichlorobenzene
03
trans-1,2-Dichloroethylene
03
trans-1,2-Dichloroethylene
03
trans-1,2-Dichloroethylene
03
trans-1,2-Dichloroethylene
03
1,2-Dichloroethane
03
1,2-Dichloroethane
03
1,2-Dichloroethane
03
1,2-Dichloroethane
03
CHLOROBENZENE
03
CHLOROBENZENE
03
CHLOROBENZENE
03
CHLOROBENZENE
03
Toluene
03
Toluene
03
Toluene
03
Toluene
03
Ethylbenzene
03
Ethylbenzene
03
Ethylbenzene
03
Ethylbenzene
03
Styrene
03
Styrene
03
Styrene
03
Styrene
03
1,1,1-Trichloroethane
03
1,1,1-Trichloroethane
03
1,1,1-Trichloroethane
03
1,1,1-Trichloroethane
03
1,2,4-Trichlorobenzene
03
1,2,4-Trichlorobenzene
03
1,2,4-Trichlorobenzene
03
1,2,4-Trichlorobenzene
03
1,2-Dichloropropane
03
1,2-Dichloropropane
03
1,2-Dichloropropane
03
1,2-Dichloropropane
03
1,1,2-Trichloroethane
03
1,1,2-Trichloroethane
03
1,1,2-Trichloroethane
03
1,1,2-Trichloroethane
03
Lead and Copper Rule
66
Lead and Copper Rule
66
Lead and Copper Rule
66
Lead and Copper Rule
66
How Does This Compare?
COLUMBIA (06237) has 288 recorded violations, including 7 health-based. 18 remain unresolved. Consider testing your tap water independently for added peace of mind.
Recommended Water Filters
Based on the contaminants detected in your area, these filter types may help improve your water quality.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
UV Water Purifier
Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.
Targets:E. coli, Coliform, Giardia, Cryptosporidium
Look for:NSF/ANSI 55 (Class A) certified
Always look for filters certified by NSF International for the specific contaminants you want to remove.