CONNECTICUT YANKEE ATOMIC POWER CO.

Connecticut — Non-Transient Non-Community — PWSID: CT0610422

System Information

PWSID	CT0610422
System Name	CONNECTICUT YANKEE ATOMIC POWER CO.
System Type	Non-Transient Non-Community
Water Source	Ground Water
Activity Status	Non-Inventory
Owner Type	Private
EPA Region	01
Serves School	No
Wholesaler	No
First Reported	Jul 20, 1979
Last Reported	Dec 15, 2025

Location & Contact

State	Connecticut
City	EAST HAMPTON
ZIP Code	06424
Address	362 INJUN HOLLOW RD
Organization	—
Phone	860-267-3583

Population & Service

Population Served	600
Service Connections	1

Drinking Water Violations (41)

This water system has 41 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
Nov 1, 2004	Nov 30, 2004	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2004	Total Coliform Rule
Nov 1, 2004	Nov 30, 2004	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2004	Total Coliform Rule
Nov 1, 2004	Nov 30, 2004	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Nov 30, 2004	Total Coliform Rule
Oct 1, 2004	Oct 31, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 2004	Total Coliform Rule
Oct 1, 2004	Oct 31, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 2004	Total Coliform Rule
Oct 1, 2004	Oct 31, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 2004	Total Coliform Rule
Oct 1, 2004	Oct 31, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Oct 31, 2004	Total Coliform Rule
Jul 1, 2004	Sep 30, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2004	Total Coliform Rule
Jul 1, 2004	Sep 30, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2004	Total Coliform Rule
Jul 1, 2004	Sep 30, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2004	Total Coliform Rule
Jul 1, 2004	Sep 30, 2004	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Sep 30, 2004	Total Coliform Rule
Jun 1, 2001	Jun 30, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2001	Total Coliform Rule
Jun 1, 2001	Jun 30, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2001	Total Coliform Rule
Jun 1, 2001	Jun 30, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2001	Total Coliform Rule
Jun 1, 2001	Jun 30, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Jun 30, 2001	Total Coliform Rule
Mar 1, 2001	Mar 31, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Mar 31, 2001	Total Coliform Rule
Mar 1, 2001	Mar 31, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Mar 31, 2001	Total Coliform Rule
Mar 1, 2001	Mar 31, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Mar 31, 2001	Total Coliform Rule
Mar 1, 2001	Mar 31, 2001	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Mar 31, 2001	Total Coliform Rule
Nov 1, 2000	Nov 30, 2000	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2000	Total Coliform Rule
Nov 1, 2000	Nov 30, 2000	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2000	Total Coliform Rule
Nov 1, 2000	Nov 30, 2000	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2000	Total Coliform Rule
Nov 1, 2000	Nov 30, 2000	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Nov 30, 2000	Total Coliform Rule
Oct 1, 1997	Dec 31, 1997	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Dec 31, 1997	Total Coliform Rule
Oct 1, 1997	Dec 31, 1997	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Dec 31, 1997	Total Coliform Rule
Oct 1, 1997	Dec 31, 1997	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Dec 31, 1997	Total Coliform Rule
Jan 1, 1997	Dec 31, 1997	Tetrachloroethylene	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 1997	Volatile Organic Chemicals
Jan 1, 1997	Dec 31, 1997	Tetrachloroethylene	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 1997	Volatile Organic Chemicals
Jan 1, 1997	Dec 31, 1997	Tetrachloroethylene	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 1997	Volatile Organic Chemicals
Jan 1, 1997	Dec 31, 1997	Tetrachloroethylene	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 1997	Volatile Organic Chemicals
Jan 1, 1997	Dec 31, 1997	Benzene	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 1997	Volatile Organic Chemicals
Jan 1, 1995	Dec 31, 1997	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1995	Dec 31, 1997	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1995	Dec 31, 1997	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1995	Dec 31, 1997	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jul 1, 1994	—	Lead and Copper Rule	TT	Yes	No	—	TT	—	Resolved	Jun 7, 1996	Lead and Copper Rule
Jul 1, 1993	Dec 31, 1993	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 1993	Lead and Copper Rule
Jul 1, 1993	Dec 31, 1993	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 1993	Lead and Copper Rule
Jul 1, 1993	Dec 31, 1993	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Dec 31, 1993	Lead and Copper Rule
—	—		—	No	No	—	—	—	—	—	—
—	—		—	No	No	—	—	—	—	—	—

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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