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	Dec 15, 2025

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 (89)

This water system has 89 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	Nitrite	MR	No	Yes	—	1 mg/L	—	Archived	Dec 31, 2024	Nitrate Rule
Jan 1, 2024	Dec 31, 2024	Nitrite	MR	No	Yes	—	1 mg/L	—	Archived	Dec 31, 2024	Nitrate Rule
Jan 1, 2024	Dec 31, 2024	Nitrite	MR	No	Yes	—	1 mg/L	—	Archived	Dec 31, 2024	Nitrate Rule
Jan 1, 2024	Dec 31, 2024	Nitrate	MR	No	Yes	—	10 mg/L	—	Archived	Dec 31, 2024	Nitrate Rule
Jan 1, 2024	Dec 31, 2024	Nitrate	MR	No	Yes	—	10 mg/L	—	Archived	Dec 31, 2024	Nitrate Rule
Jan 1, 2024	Dec 31, 2024	Nitrate	MR	No	Yes	—	10 mg/L	—	Archived	Dec 31, 2024	Nitrate Rule
Sep 26, 2011	—	Public Notice	Other	No	No	—	—	—	Resolved	Dec 12, 2011	Public Notice Rule and Revised PN Rule
Jul 1, 2011	Sep 30, 2011	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2011	Total Coliform Rule
Jul 1, 2011	Sep 30, 2011	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2011	Total Coliform Rule
Jul 1, 2011	Sep 30, 2011	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2011	Total Coliform Rule
Jul 1, 2011	Sep 30, 2011	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2011	Total Coliform Rule
Dec 1, 2010	Dec 31, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 2010	Total Coliform Rule
Dec 1, 2010	Dec 31, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 2010	Total Coliform Rule
Dec 1, 2010	Dec 31, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 2010	Total Coliform Rule
Dec 1, 2010	Dec 31, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 2010	Total Coliform Rule
Dec 1, 2010	Dec 31, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 2010	Total Coliform Rule
Nov 1, 2010	Nov 30, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2010	Total Coliform Rule
Nov 1, 2010	Nov 30, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2010	Total Coliform Rule
Nov 1, 2010	Nov 30, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2010	Total Coliform Rule
Nov 1, 2010	Nov 30, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2010	Total Coliform Rule
Nov 1, 2010	Nov 30, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2010	Total Coliform Rule
Oct 1, 2010	Oct 31, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 2010	Total Coliform Rule
Oct 1, 2010	Oct 31, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 2010	Total Coliform Rule
Oct 1, 2010	Oct 31, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 2010	Total Coliform Rule
Oct 1, 2010	Oct 31, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 2010	Total Coliform Rule
Oct 1, 2010	Oct 31, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 2010	Total Coliform Rule
Jul 1, 2010	Sep 30, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2010	Total Coliform Rule
Jul 1, 2010	Sep 30, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2010	Total Coliform Rule
Jul 1, 2010	Sep 30, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2010	Total Coliform Rule
Jul 1, 2010	Sep 30, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2010	Total Coliform Rule
Jul 1, 2010	Sep 30, 2010	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2010	Total Coliform Rule
Dec 21, 2009	—	Public Notice	Other	No	No	—	—	—	Resolved	Nov 22, 2010	Public Notice Rule and Revised PN Rule
Dec 21, 2009	—	Public Notice	Other	No	No	—	—	—	Resolved	Nov 22, 2010	Public Notice Rule and Revised PN Rule
Nov 22, 2009	—	Public Notice	Other	No	No	—	—	—	Resolved	Aug 30, 2010	Public Notice Rule and Revised PN Rule
Nov 22, 2009	—	Public Notice	Other	No	No	—	—	—	Resolved	Aug 30, 2010	Public Notice Rule and Revised PN Rule
Oct 1, 2009	Dec 31, 2009	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 2009	Total Coliform Rule
Oct 1, 2009	Dec 31, 2009	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 2009	Total Coliform Rule
Oct 1, 2009	Dec 31, 2009	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 2009	Total Coliform Rule
Oct 1, 2009	Dec 31, 2009	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 2009	Total Coliform Rule
Oct 1, 2009	Dec 31, 2009	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 2009	Total Coliform Rule
Oct 1, 2009	Dec 31, 2009	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 2009	Total Coliform Rule
Oct 1, 2009	Dec 31, 2009	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 2009	Total Coliform Rule
Oct 1, 2009	Dec 31, 2009	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 2009	Total Coliform Rule
Oct 1, 2009	Dec 31, 2009	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 2009	Total Coliform Rule
Oct 1, 2009	Dec 31, 2009	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Dec 31, 2009	Total Coliform Rule
Apr 1, 2006	Jun 30, 2006	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jun 30, 2006	Total Coliform Rule
Apr 1, 2006	Jun 30, 2006	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jun 30, 2006	Total Coliform Rule
Jul 1, 2005	Sep 30, 2005	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2005	Total Coliform Rule
Jul 1, 2005	Sep 30, 2005	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2005	Total Coliform Rule
Jul 1, 2005	Sep 30, 2005	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2005	Total Coliform Rule

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.

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