AQUARION-PLAINVILLE REGIONAL
Connecticut — Community Water System — PWSID: CT1100011
System Information
| PWSID | CT1100011 |
| System Name | AQUARION-PLAINVILLE REGIONAL |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 01 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 8, 1979 |
| Last Reported | Mar 30, 2026 |
Location & Contact
| State | Connecticut |
| City | SHELTON |
| ZIP Code | 06484 |
| Address | 505 Huntington St. |
| Organization | ULRICH, ROBERT J. |
| Phone | 203-926-4320 |
Population & Service
| Population Served | 18,231 |
| Service Connections | 6,622 |
Drinking Water Violations (63)
This water system has 63 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, 2021 | — | Other | No | No | — | — | — | Resolved | Jul 6, 2021 | — | |
| Jul 1, 2021 | — | Other | No | No | — | — | — | Resolved | Jul 6, 2021 | — | |
| Jul 1, 2020 | — | Other | No | No | — | — | — | Resolved | Jul 6, 2021 | — | |
| Jan 1, 2019 | Dec 31, 2021 | MR | No | Yes | — | 0.006 mg/L | — | Archived | Dec 31, 2021 | — | |
| Jan 1, 2019 | Dec 31, 2021 | MR | No | Yes | — | 0.005 mg/L | — | Archived | Dec 31, 2021 | — | |
| Jan 1, 2019 | Dec 31, 2021 | MR | No | Yes | — | 0.010 mg/L | — | Archived | Dec 31, 2021 | — | |
| Jan 1, 2019 | Dec 31, 2021 | MR | No | Yes | — | 0.004 mg/L | — | Archived | Dec 31, 2021 | — | |
| Jul 1, 2016 | — | Other | No | No | — | — | — | Resolved | Jul 6, 2016 | — | |
| Jul 1, 2016 | — | Other | No | No | — | — | — | Resolved | Jul 6, 2016 | — | |
| Jan 1, 2016 | Mar 31, 2016 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Mar 31, 2016 | — | |
| Jan 1, 2016 | Mar 31, 2016 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Mar 31, 2016 | — | |
| Jan 1, 2016 | Mar 31, 2016 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Mar 31, 2016 | — | |
| Jan 1, 2016 | Mar 31, 2016 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Mar 31, 2016 | — | |
| Jan 1, 2016 | Mar 31, 2016 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Mar 31, 2016 | — | |
| Jan 1, 2016 | Mar 31, 2016 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Mar 31, 2016 | — | |
| Jul 1, 2014 | — | Other | No | No | — | — | — | Resolved | Jul 3, 2014 | — | |
| Jul 1, 2014 | — | Other | No | No | — | — | — | Resolved | Jul 3, 2014 | — | |
| Apr 1, 2014 | Jun 30, 2014 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jun 30, 2014 | — | |
| Apr 1, 2014 | Jun 30, 2014 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jun 30, 2014 | — | |
| Apr 1, 2014 | Jun 30, 2014 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Jun 30, 2014 | — | |
| Apr 1, 2014 | Jun 30, 2014 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jun 30, 2014 | — | |
| Feb 1, 2013 | Feb 28, 2013 | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2013 | — | |
| Feb 1, 2013 | Feb 28, 2013 | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2013 | — | |
| Feb 1, 2013 | Feb 28, 2013 | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2013 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 30 ug/L | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 30 ug/L | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 30 ug/L | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 30 ug/L | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 15 pCi/L | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 15 pCi/L | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 15 pCi/L | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 15 pCi/L | — | Resolved | Dec 31, 2013 | — | |
| Jan 1, 2011 | Dec 31, 2013 | MR | No | Yes | — | 5 pCi/L | — | Resolved | Dec 31, 2013 | — | |
| Jul 1, 2010 | — | Other | No | No | — | — | — | Resolved | Aug 2, 2010 | — | |
| Jul 1, 2010 | — | Other | No | No | — | — | — | Resolved | Aug 2, 2010 | — | |
| Jul 1, 2006 | — | Other | No | No | — | — | — | Resolved | Aug 8, 2006 | — | |
| Jul 1, 2006 | — | Other | No | No | — | — | — | Resolved | Aug 8, 2006 | — | |
| Jan 1, 2006 | Mar 31, 2006 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2006 | — | |
| Jan 1, 2006 | Mar 31, 2006 | MR | No | Yes | — | 4 mrem/yr | — | Resolved | Mar 31, 2006 | — | |
| Jan 1, 2006 | Mar 31, 2006 | MR | No | Yes | — | 4 mrem/yr | — | Resolved | Mar 31, 2006 | — | |
| Jan 1, 2006 | Mar 31, 2006 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2006 | — | |
| Jan 1, 2006 | Mar 31, 2006 | MR | No | Yes | — | 4 mrem/yr | — | Resolved | Mar 31, 2006 | — | |
| Jan 1, 2006 | Mar 31, 2006 | MR | No | Yes | — | 4 mrem/yr | — | Resolved | Mar 31, 2006 | — | |
| Jan 1, 2006 | Mar 31, 2006 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2006 | — | |
| Jan 1, 2006 | Mar 31, 2006 | MR | No | Yes | — | — | — | Resolved | Mar 31, 2006 | — | |
| Feb 1, 2005 | Feb 28, 2005 | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2005 | — | |
| Feb 1, 2005 | Feb 28, 2005 | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2005 | — |
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.