AQUARION-RIDGEFIELD KNOLLS
PWS ID: CT1180021 · SHELTON, Connecticut 06484
Population Served
958
Total Violations
228
Health-Based Violations
55
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 223
- County
- Fairfield
- School/Daycare
- No
- MCL Violations
- 46
- Monitoring Violations
- 157
- Treatment Tech Violations
- 9
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 46 | 2003 |
| Coliform (TCR) | MR | 15 | 2006 |
| Lead and Copper Rule | MR | 10 | 2021 |
| Lead and Copper Rule | TT | 9 | 2008 |
| Consumer Confidence Rule | Other | 6 | 2018 |
| 1,1,2-Trichloroethane | MR | 4 | 1993 |
| Trichloroethylene | MR | 4 | 1993 |
| 1,2-Dichloropropane | MR | 4 | 1993 |
| 1,2-Dichloroethane | MR | 4 | 1993 |
| trans-1,2-Dichloroethylene | MR | 4 | 1993 |
| 1,1-Dichloroethylene | MR | 4 | 1993 |
| Vinyl chloride | MR | 4 | 1993 |
| p-Dichlorobenzene | MR | 4 | 1993 |
| DICHLOROMETHANE | MR | 4 | 1993 |
| ETHYLENE DIBROMIDE | MR | 4 | 1993 |
| Beryllium, Total | MR | 4 | 1991 |
| Antimony, Total | MR | 4 | 1991 |
| Selenium | MR | 4 | 1991 |
| Nickel | MR | 4 | 1991 |
| Mercury | MR | 4 | 1991 |
| Coliform (TCR) | Other | 4 | 1995 |
| CYANIDE | MR | 4 | 1991 |
| Chromium | MR | 4 | 1991 |
| Cadmium | MR | 4 | 1991 |
| Barium | MR | 4 | 1991 |
| Benzene | MR | 4 | 1993 |
| Toluene | MR | 4 | 1993 |
| o-Dichlorobenzene | MR | 4 | 1993 |
| 1,1,1-Trichloroethane | MR | 4 | 1993 |
| CHLOROBENZENE | MR | 4 | 1993 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.