COLCHESTER COMMONS
PWS ID: CT0286011 · COLCHESTER, Connecticut 06415
Population Served
224
Total Violations
331
Health-Based Violations
41
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 96
- County
- New London
- School/Daycare
- No
- MCL Violations
- 40
- Monitoring Violations
- 262
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 36 | 2012 |
| Chlorine | MR | 14 | 2009 |
| Coliform (TCR) | MR | 13 | 2009 |
| Lead and Copper Rule | MR | 10 | 2024 |
| Nitrite | MR | 8 | 2006 |
| Consumer Confidence Rule | Other | 8 | 2017 |
| Nitrate | MR | 8 | 2006 |
| Tetrachloroethylene | MR | 5 | 2009 |
| 1,1,1-Trichloroethane | MR | 5 | 2009 |
| trans-1,2-Dichloroethylene | MR | 5 | 2009 |
| 1,1-Dichloroethylene | MR | 5 | 2009 |
| o-Dichlorobenzene | MR | 5 | 2009 |
| DICHLOROMETHANE | MR | 5 | 2009 |
| Styrene | MR | 5 | 2009 |
| ETHYLENE DIBROMIDE | MR | 5 | 2009 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 5 | 2009 |
| cis-1,2-Dichloroethylene | MR | 5 | 2009 |
| Vinyl chloride | MR | 5 | 2009 |
| 1,2-Dichloroethane | MR | 5 | 2009 |
| Trichloroethylene | MR | 5 | 2009 |
| CHLOROBENZENE | MR | 5 | 2009 |
| Toluene | MR | 5 | 2009 |
| Public Notice | Other | 5 | 2011 |
| Ethylbenzene | MR | 5 | 2009 |
| 1,2-Dichloropropane | MR | 5 | 2009 |
| Benzene | MR | 5 | 2009 |
| Carbon tetrachloride | MR | 5 | 2009 |
| 1,1,2-Trichloroethane | MR | 5 | 2009 |
| p-Dichlorobenzene | MR | 5 | 2009 |
| Revised Total Coliform Rule | RPT | 4 | 2019 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.