AQUARION-RIDGEFIELD

Connecticut — Community Water System — PWSID: CT1180011

System Information

PWSID	CT1180011
System Name	AQUARION-RIDGEFIELD
System Type	Community Water System
Water Source	Surface Water Purchased
Activity Status	Active
Owner Type	Private
EPA Region	01
Serves School	No
Wholesaler	No
First Reported	Mar 8, 1979
Last Reported	Dec 15, 2025

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	7,476
Service Connections	2,814

Drinking Water Violations (52)

This water system has 52 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
Dec 30, 2021	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jan 21, 2022	Lead and Copper Rule
Jan 21, 2021	—	Public Notice	Other	No	No	—	—	—	Resolved	May 3, 2021	Public Notice Rule and Revised PN Rule
Jan 21, 2021	—	Public Notice	Other	No	No	—	—	—	Resolved	May 3, 2021	Public Notice Rule and Revised PN Rule
Sep 12, 2019	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Sep 5, 2019	Ground Water Rule
Sep 12, 2019	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Sep 5, 2019	Ground Water Rule
Sep 12, 2019	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Sep 5, 2019	Ground Water Rule
Sep 12, 2019	—	E. COLI	MR	No	Yes	—	—	—	Resolved	Sep 5, 2019	Ground Water Rule
Jul 1, 2018	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jul 9, 2018	Consumer Confidence Rule
Jul 1, 2018	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jul 9, 2018	Consumer Confidence Rule
Jul 1, 2006	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jul 13, 2006	Consumer Confidence Rule
Jul 1, 2006	—	Consumer Confidence Rule	Other	No	No	—	—	—	Resolved	Jul 13, 2006	Consumer Confidence Rule
Jul 1, 1993	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Oct 26, 1993	Lead and Copper Rule
Jul 1, 1993	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Oct 26, 1993	Lead and Copper Rule
Jul 1, 1993	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Oct 26, 1993	Lead and Copper Rule
Jul 1, 1993	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Oct 26, 1993	Lead and Copper Rule
May 1, 1993	May 31, 1993	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 1993	Total Coliform Rule
May 1, 1993	May 31, 1993	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 1993	Total Coliform Rule
May 1, 1993	May 31, 1993	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 1993	Total Coliform Rule
May 1, 1993	May 31, 1993	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 1993	Total Coliform Rule
Jan 1, 1992	Dec 31, 1994	Selenium	MR	No	Yes	—	0.05 mg/L	—	Resolved	Dec 31, 1994	Inorganic Chemicals
Jan 1, 1992	—	Surface Water Treatment Rule	TT	Yes	No	—	—	—	Resolved	May 23, 2001	Surface Water Treatment Rule
Jan 1, 1992	—	Surface Water Treatment Rule	TT	Yes	No	—	—	—	Resolved	May 23, 2001	Surface Water Treatment Rule
Jan 1, 1992	—	Surface Water Treatment Rule	TT	Yes	No	—	—	—	Resolved	May 23, 2001	Surface Water Treatment Rule
Jan 1, 1992	—	Surface Water Treatment Rule	TT	Yes	No	—	—	—	Resolved	May 23, 2001	Surface Water Treatment Rule
Jan 1, 1992	—	Surface Water Treatment Rule	TT	Yes	No	—	—	—	Resolved	May 23, 2001	Surface Water Treatment Rule
Jan 1, 1992	Dec 31, 1994	Chromium	MR	No	Yes	—	0.1 mg/L	—	Resolved	Dec 31, 1994	Inorganic Chemicals
Jan 1, 1992	Dec 31, 1994	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 1994	Inorganic Chemicals
Jan 1, 1992	Dec 31, 1994	Barium	MR	No	Yes	—	2 mg/L	—	Resolved	Dec 31, 1994	Inorganic Chemicals
Jan 1, 1992	Dec 31, 1994	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Dec 31, 1994	Arsenic Rule
Jan 1, 1992	Dec 31, 1994	CYANIDE	MR	No	Yes	—	0.2 mg/L	—	Resolved	Dec 31, 1994	Inorganic Chemicals
Jan 1, 1992	Dec 31, 1994	Thallium, Total	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 1994	Inorganic Chemicals
Jan 1, 1992	Dec 31, 1994	Mercury	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 1994	Inorganic Chemicals
Jan 1, 1992	Dec 31, 1994	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Resolved	Dec 31, 1994	Inorganic Chemicals
Jan 1, 1992	Dec 31, 1994	Beryllium, Total	MR	No	Yes	—	0.004 mg/L	—	Resolved	Dec 31, 1994	Inorganic Chemicals
Jan 1, 1992	Dec 31, 1994	Antimony, Total	MR	No	Yes	—	0.006 mg/L	—	Resolved	Dec 31, 1994	Inorganic Chemicals
Jan 1, 1992	Dec 31, 1994	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 1994	Inorganic Chemicals
Jan 1, 1992	May 23, 2001	Surface Water Treatment Rule	TT	Yes	No	—	—	—	Archived	May 23, 2001	Surface Water Treatment Rule
Jan 1, 1992	Dec 31, 1994	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 1994	Inorganic Chemicals
Jan 1, 1992	Dec 31, 1994	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 1994	Inorganic Chemicals
Jan 1, 1991	Dec 31, 1994	Gross Alpha, Excl. Radon and U	MR	No	Yes	—	15 pCi/L	—	Resolved	Dec 31, 1994	Radionuclides and Revised Rad Rule
Jan 1, 1991	Dec 31, 1994	Gross Alpha, Excl. Radon and U	MR	No	Yes	—	15 pCi/L	—	Resolved	Dec 31, 1994	Radionuclides and Revised Rad Rule
—	—		—	No	No	—	—	—	—	—	—
—	—		—	No	No	—	—	—	—	—	—
—	—		—	No	No	—	—	—	—	—	—
—	—		—	No	No	—	—	—	—	—	—
—	—		—	No	No	—	—	—	—	—	—
—	—		—	No	No	—	—	—	—	—	—
—	—		—	No	No	—	—	—	—	—	—
—	—		—	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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