STONINGTON INSTITUTE - MAIN BUILDING
Connecticut - Transient Non-Community - PWSID: CT1020404
System Information
| PWSID | CT1020404 |
| System Name | STONINGTON INSTITUTE - MAIN BUILDING |
| System Type | Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 01 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jan 11, 2000 |
| Last Reported | Mar 30, 2026 |
Location & Contact
| State | Connecticut |
| City | NORTH STONINGTON |
| ZIP Code | 06359 |
| Address | 75 Swantown Hill Rd. |
| Organization | WORST, HOWARD |
| Phone | 860-235-6132 |
Population & Service
| Population Served | 77 |
| Service Connections | 1 |
Drinking Water Violations (91)
This water system has 91 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 1 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 1 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 1 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 1 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Sep 26, 2011 | - | Other | No | No | - | - | - | Resolved | Dec 12, 2011 | - | |
| Jul 1, 2011 | Sep 30, 2011 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2011 | - | |
| Jul 1, 2011 | Sep 30, 2011 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2011 | - | |
| Jul 1, 2011 | Sep 30, 2011 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2011 | - | |
| Jul 1, 2011 | Sep 30, 2011 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2011 | - | |
| Dec 1, 2010 | Dec 31, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2010 | - | |
| Dec 1, 2010 | Dec 31, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2010 | - | |
| Dec 1, 2010 | Dec 31, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2010 | - | |
| Dec 1, 2010 | Dec 31, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2010 | - | |
| Dec 1, 2010 | Dec 31, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2010 | - | |
| Nov 1, 2010 | Nov 30, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Nov 30, 2010 | - | |
| Nov 1, 2010 | Nov 30, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Nov 30, 2010 | - | |
| Nov 1, 2010 | Nov 30, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Nov 30, 2010 | - | |
| Nov 1, 2010 | Nov 30, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Nov 30, 2010 | - | |
| Nov 1, 2010 | Nov 30, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Nov 30, 2010 | - | |
| Oct 1, 2010 | Oct 31, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2010 | - | |
| Oct 1, 2010 | Oct 31, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2010 | - | |
| Oct 1, 2010 | Oct 31, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2010 | - | |
| Oct 1, 2010 | Oct 31, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2010 | - | |
| Oct 1, 2010 | Oct 31, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2010 | - | |
| Jul 1, 2010 | Sep 30, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2010 | - | |
| Jul 1, 2010 | Sep 30, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2010 | - | |
| Jul 1, 2010 | Sep 30, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2010 | - | |
| Jul 1, 2010 | Sep 30, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2010 | - | |
| Jul 1, 2010 | Sep 30, 2010 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 2010 | - | |
| Dec 21, 2009 | - | Other | No | No | - | - | - | Resolved | Nov 22, 2010 | - | |
| Dec 21, 2009 | - | Other | No | No | - | - | - | Resolved | Nov 22, 2010 | - | |
| Nov 22, 2009 | - | Other | No | No | - | - | - | Resolved | Aug 30, 2010 | - | |
| Nov 22, 2009 | - | Other | No | No | - | - | - | Resolved | Aug 30, 2010 | - | |
| Oct 1, 2009 | Dec 31, 2009 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2009 | - | |
| Oct 1, 2009 | Dec 31, 2009 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2009 | - | |
| Oct 1, 2009 | Dec 31, 2009 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2009 | - | |
| Oct 1, 2009 | Dec 31, 2009 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2009 | - | |
| Oct 1, 2009 | Dec 31, 2009 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2009 | - | |
| Oct 1, 2009 | Dec 31, 2009 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2009 | - | |
| Oct 1, 2009 | Dec 31, 2009 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2009 | - | |
| Oct 1, 2009 | Dec 31, 2009 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2009 | - | |
| Oct 1, 2009 | Dec 31, 2009 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2009 | - | |
| Oct 1, 2009 | Dec 31, 2009 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2009 | - | |
| Apr 1, 2006 | Jun 30, 2006 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2006 | - | |
| Apr 1, 2006 | Jun 30, 2006 | MR | No | No | - | 5% of samples | - | Resolved | Jun 30, 2006 | - | |
| Jul 1, 2005 | Sep 30, 2005 | MCL | Yes | No | - | 5% of samples | - | Resolved | Sep 30, 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.