COLCHESTER SEWER & WATER COMMISSION
Connecticut - Community Water System - PWSID: CT0280011
System Information
| PWSID | CT0280011 |
| System Name | COLCHESTER SEWER & WATER COMMISSION |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 01 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 8, 1979 |
| Last Reported | Mar 30, 2026 |
Location & Contact
| State | Connecticut |
| City | COLCHESTER |
| ZIP Code | 06415 |
| Address | 127 Norwich Ave |
| Organization | LEONE, JOSEPH D. |
| Phone | 860-537-7288 |
Population & Service
| Population Served | 4,020 |
| Service Connections | 2,100 |
Drinking Water Violations (161)
This water system has 161 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Aug 10, 2025 | - | Other | No | No | - | - | - | Resolved | Aug 29, 2025 | - | |
| Jul 1, 2025 | - | Other | No | No | - | - | - | Resolved | Jul 25, 2025 | - | |
| Jun 15, 2025 | - | Other | No | No | - | - | - | Resolved | Aug 29, 2025 | - | |
| Jun 15, 2025 | - | Other | No | No | - | - | - | Resolved | Aug 29, 2025 | - | |
| May 25, 2024 | - | Other | No | No | - | - | - | Resolved | Aug 29, 2025 | - | |
| May 25, 2024 | - | Other | No | No | - | - | - | Resolved | Aug 29, 2025 | - | |
| Mar 1, 2024 | Mar 31, 2024 | MR | No | Yes | - | - | - | Resolved | Mar 31, 2024 | - | |
| Mar 1, 2024 | Mar 31, 2024 | MR | No | Yes | - | - | - | Resolved | Mar 31, 2024 | - | |
| Mar 1, 2024 | Mar 31, 2024 | MR | No | Yes | - | - | - | Resolved | Mar 31, 2024 | - | |
| Mar 1, 2024 | Mar 31, 2024 | MR | No | Yes | - | - | - | Resolved | Mar 31, 2024 | - | |
| Jan 1, 2024 | Jan 31, 2024 | MR | No | Yes | - | - | - | Resolved | Jan 31, 2024 | - | |
| Jan 1, 2024 | Jan 31, 2024 | MR | No | Yes | - | - | - | Resolved | Jan 31, 2024 | - | |
| Jan 1, 2024 | Jan 31, 2024 | MR | No | Yes | - | - | - | Resolved | Jan 31, 2024 | - | |
| Jan 1, 2024 | Jan 31, 2024 | MR | No | Yes | - | - | - | Resolved | Jan 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jul 1, 2023 | - | Other | No | No | - | - | - | Resolved | Jul 17, 2023 | - | |
| Oct 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Nov 30, 2022 | - | |
| Oct 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Nov 30, 2022 | - | |
| Oct 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Nov 30, 2022 | - | |
| Oct 1, 2022 | Dec 31, 2022 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Nov 30, 2022 | - | |
| Jul 1, 2021 | - | Other | No | No | - | - | - | Resolved | Jul 2, 2021 | - | |
| Jul 1, 2021 | - | Other | No | No | - | - | - | Resolved | Jul 2, 2021 | - | |
| Feb 27, 2020 | - | Other | No | No | - | - | - | Resolved | Jun 30, 2020 | - | |
| Feb 27, 2020 | - | Other | No | No | - | - | - | Resolved | Jun 30, 2020 | - | |
| Feb 26, 2020 | - | Other | No | No | - | - | - | Resolved | Jun 30, 2020 | - | |
| Feb 26, 2020 | - | Other | No | No | - | - | - | Resolved | Jun 30, 2020 | - | |
| Oct 1, 2019 | Dec 31, 2019 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2019 | - | |
| Oct 1, 2019 | Dec 31, 2019 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2019 | - | |
| Mar 1, 2019 | Mar 31, 2019 | MR | No | Yes | - | - | - | Resolved | Mar 31, 2019 | - | |
| Mar 1, 2019 | Mar 31, 2019 | MR | No | Yes | - | - | - | Resolved | Mar 31, 2019 | - | |
| Dec 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2018 | - | |
| Dec 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2018 | - | |
| Dec 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2018 | - | |
| Dec 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2018 | - | |
| Dec 1, 2018 | Dec 31, 2018 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2018 | - | |
| Dec 1, 2018 | Dec 31, 2018 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2018 | - | |
| Dec 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2018 | - | |
| Dec 1, 2018 | Dec 31, 2018 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2018 | - | |
| Dec 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2018 | - | |
| Dec 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2018 | - | |
| Dec 1, 2018 | Dec 31, 2018 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2018 | - | |
| Dec 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2018 | - | |
| Dec 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2018 | - |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.