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AQUARION-PLAINVILLE REGIONAL

Connecticut — Community Water System — PWSID: CT1100011

System Information

PWSIDCT1100011
System NameAQUARION-PLAINVILLE REGIONAL
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region01
Serves SchoolNo
WholesalerNo
First ReportedMar 8, 1979
Last ReportedDec 15, 2025

Location & Contact

StateConnecticut
CitySHELTON
ZIP Code06484
Address505 Huntington St.
OrganizationULRICH, ROBERT J.
Phone203-926-4320

Population & Service

Population Served18,231
Service Connections6,622

Drinking Water Violations (58)

This water system has 58 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 — Consumer Confidence Rule Other No No — — — Resolved Jul 6, 2021 Consumer Confidence Rule
Jul 1, 2021 — Consumer Confidence Rule Other No No — — — Resolved Jul 6, 2021 Consumer Confidence Rule
Jul 1, 2020 — Consumer Confidence Rule Other No No — — — Resolved Jul 6, 2021 Consumer Confidence Rule
Jan 1, 2019 Dec 31, 2021 Arsenic MR No Yes — 0.010 mg/L — Archived Dec 31, 2021 Arsenic Rule
Jan 1, 2019 Dec 31, 2021 Beryllium, Total MR No Yes — 0.004 mg/L — Archived Dec 31, 2021 Inorganic Chemicals
Jan 1, 2019 Dec 31, 2021 Cadmium MR No Yes — 0.005 mg/L — Archived Dec 31, 2021 Inorganic Chemicals
Jan 1, 2019 Dec 31, 2021 Antimony, Total MR No Yes — 0.006 mg/L — Archived Dec 31, 2021 Inorganic Chemicals
Jul 1, 2016 — Consumer Confidence Rule Other No No — — — Resolved Jul 6, 2016 Consumer Confidence Rule
Jul 1, 2016 — Consumer Confidence Rule Other No No — — — Resolved Jul 6, 2016 Consumer Confidence Rule
Jan 1, 2016 Mar 31, 2016 TTHM MR No Yes — 0.080 mg/L — Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 TTHM MR No Yes — 0.080 mg/L — Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 TTHM MR No Yes — 0.080 mg/L — Resolved Mar 31, 2016 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2014 — Consumer Confidence Rule Other No No — — — Resolved Jul 3, 2014 Consumer Confidence Rule
Jul 1, 2014 — Consumer Confidence Rule Other No No — — — Resolved Jul 3, 2014 Consumer Confidence Rule
Apr 1, 2014 Jun 30, 2014 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2014 Jun 30, 2014 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2014 Jun 30, 2014 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2014 Jun 30, 2014 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Feb 1, 2013 Feb 28, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 2013 Total Coliform Rule
Feb 1, 2013 Feb 28, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 2013 Total Coliform Rule
Feb 1, 2013 Feb 28, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 2013 Total Coliform Rule
Jan 1, 2011 Dec 31, 2013 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Jan 1, 2011 Dec 31, 2013 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Jan 1, 2011 Dec 31, 2013 Combined Uranium MR No Yes — 30 ug/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Jan 1, 2011 Dec 31, 2013 Combined Uranium MR No Yes — 30 ug/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Jan 1, 2011 Dec 31, 2013 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Jan 1, 2011 Dec 31, 2013 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Jan 1, 2011 Dec 31, 2013 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Jan 1, 2011 Dec 31, 2013 Combined Uranium MR No Yes — 30 ug/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Jan 1, 2011 Dec 31, 2013 Combined Uranium MR No Yes — 30 ug/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Jan 1, 2011 Dec 31, 2013 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Jan 1, 2011 Dec 31, 2013 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Jan 1, 2011 Dec 31, 2013 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 2013 Radionuclides and Revised Rad Rule
Jul 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Aug 2, 2010 Consumer Confidence Rule
Jul 1, 2010 — Consumer Confidence Rule Other No No — — — Resolved Aug 2, 2010 Consumer Confidence Rule
Jul 1, 2006 — Consumer Confidence Rule Other No No — — — Resolved Aug 8, 2006 Consumer Confidence Rule
Jul 1, 2006 — Consumer Confidence Rule Other No No — — — Resolved Aug 8, 2006 Consumer Confidence Rule
Jan 1, 2006 Mar 31, 2006 Gross Beta Particle Activity MR No Yes — 4 mrem/yr — Resolved Mar 31, 2006 Radionuclides and Revised Rad Rule
Jan 1, 2006 Mar 31, 2006 ManMade Beta Particle and Photon Emitter MR No Yes — — — Resolved Mar 31, 2006 Radionuclides and Revised Rad Rule
Jan 1, 2006 Mar 31, 2006 ManMade Beta Particle and Photon Emitter MR No Yes — — — Resolved Mar 31, 2006 Radionuclides and Revised Rad Rule
Jan 1, 2006 Mar 31, 2006 Gross Beta Particle Activity MR No Yes — 4 mrem/yr — Resolved Mar 31, 2006 Radionuclides and Revised Rad Rule
Jan 1, 2006 Mar 31, 2006 Gross Beta Particle Activity MR No Yes — 4 mrem/yr — Resolved Mar 31, 2006 Radionuclides and Revised Rad Rule
Jan 1, 2006 Mar 31, 2006 ManMade Beta Particle and Photon Emitter MR No Yes — — — Resolved Mar 31, 2006 Radionuclides and Revised Rad Rule
Jan 1, 2006 Mar 31, 2006 ManMade Beta Particle and Photon Emitter MR No Yes — — — Resolved Mar 31, 2006 Radionuclides and Revised Rad Rule
Jan 1, 2006 Mar 31, 2006 Gross Beta Particle Activity MR No Yes — 4 mrem/yr — Resolved Mar 31, 2006 Radionuclides and Revised Rad Rule
Feb 1, 2005 Feb 28, 2005 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 2005 Total Coliform Rule
Feb 1, 2005 Feb 28, 2005 Coliform (TCR) MR No No — 5% of samples — Resolved Feb 28, 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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