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WATERTOWN WATER & SEWER AUTHORITY

Connecticut — Community Water System — PWSID: CT1530021

System Information

PWSIDCT1530021
System NameWATERTOWN WATER & SEWER AUTHORITY
System TypeCommunity Water System
Water SourceSurface Water Purchased
Activity StatusActive
Owner TypeLocal
EPA Region01
Serves SchoolNo
WholesalerNo
First ReportedMar 8, 1979
Last ReportedDec 15, 2025

Location & Contact

StateConnecticut
CityOAKVILLE
ZIP Code06779
Address747 French Street
OrganizationMCMAHON, DAVID
Phone860-945-5299

Population & Service

Population Served9,972
Service Connections3,735

Drinking Water Violations (139)

This water system has 139 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, 2025 — Consumer Confidence Rule Other No No — — — Resolved Aug 27, 2025 Consumer Confidence Rule
Dec 30, 2024 — Lead and Copper Rule MR No No — TT — Resolved Jan 29, 2025 Lead and Copper Rule
Dec 30, 2024 — Lead and Copper Rule MR No No — TT — Resolved Jan 29, 2025 Lead and Copper Rule
Jul 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Jul 10, 2024 Consumer Confidence Rule
Jul 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Jul 10, 2024 Consumer Confidence Rule
Aug 10, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jul 13, 2023 Consumer Confidence Rule
Aug 10, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jul 13, 2023 Consumer Confidence Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jun 30, 2023 Consumer Confidence Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jun 30, 2023 Consumer Confidence Rule
Dec 30, 2018 — Lead and Copper Rule MR No No — TT — Resolved Jan 18, 2019 Lead and Copper Rule
Mar 1, 2016 Mar 31, 2016 Coliform (TCR) MR No No — 5% of samples — Resolved Mar 31, 2016 Total Coliform Rule
Mar 1, 2016 Mar 31, 2016 Coliform (TCR) MR No No — 5% of samples — Resolved Mar 31, 2016 Total Coliform Rule
Mar 1, 2016 Mar 31, 2016 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2016 Surface Water Treatment Rule
Mar 1, 2016 Mar 31, 2016 Surface Water Treatment Rule MR No Yes — — — Resolved Mar 31, 2016 Surface Water Treatment Rule
Jan 1, 2016 Mar 31, 2016 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2016 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2016 Mar 31, 2016 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2016 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2014 — Lead and Copper Rule MR No No — TT — Resolved Sep 30, 2015 Lead and Copper Rule
Oct 1, 2014 — Lead and Copper Rule MR No No — TT — Resolved Sep 30, 2015 Lead and Copper Rule
Oct 1, 2014 — Lead and Copper Rule MR No No — TT — Resolved Sep 30, 2015 Lead and Copper Rule
Oct 1, 2014 — Lead and Copper Rule MR No No — TT — Resolved Sep 30, 2015 Lead and Copper Rule
Jul 1, 2013 — Consumer Confidence Rule Other No No — — — Resolved Aug 2, 2013 Consumer Confidence Rule
Jul 1, 2013 — Consumer Confidence Rule Other No No — — — Resolved Aug 2, 2013 Consumer Confidence Rule
Jun 1, 2013 Jun 30, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Jun 30, 2013 Total Coliform Rule
Jun 1, 2013 Jun 30, 2013 Coliform (TCR) MR No No — 5% of samples — Resolved Jun 30, 2013 Total Coliform Rule
Jul 1, 2009 — Consumer Confidence Rule Other No No — — — Resolved Jul 10, 2009 Consumer Confidence Rule
Jul 1, 2009 — Consumer Confidence Rule Other No No — — — Resolved Jul 10, 2009 Consumer Confidence Rule
Apr 1, 2009 Jun 30, 2009 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2009 Jun 30, 2009 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2009 Jun 30, 2009 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2009 Jun 30, 2009 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Dec 1, 2008 Dec 31, 2008 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2008 Total Coliform Rule
Dec 1, 2008 Dec 31, 2008 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2008 Total Coliform Rule
Oct 1, 2008 Dec 31, 2008 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2008 Dec 31, 2008 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2008 Dec 31, 2008 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2008 Dec 31, 2008 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2008 Dec 31, 2008 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2008 Dec 31, 2008 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2008 Stage 1 Disinfectants and Disinfection Byproducts Rule
Aug 10, 2008 — Consumer Confidence Rule Other No No — — — Resolved Dec 4, 2008 Consumer Confidence Rule
Aug 10, 2008 — Consumer Confidence Rule Other No No — — — Resolved Dec 4, 2008 Consumer Confidence Rule
Jul 1, 2008 — Consumer Confidence Rule Other No No — — — Resolved Dec 4, 2008 Consumer Confidence Rule
Jul 1, 2008 — Consumer Confidence Rule Other No No — — — Resolved Dec 4, 2008 Consumer Confidence Rule
Nov 1, 2007 Nov 30, 2007 Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2007 Surface Water Treatment Rule
Nov 1, 2007 Nov 30, 2007 Surface Water Treatment Rule MR No Yes — — — Resolved Nov 30, 2007 Surface Water Treatment Rule
Nov 1, 2007 Nov 30, 2007 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 2007 Total Coliform Rule
Nov 1, 2007 Nov 30, 2007 Coliform (TCR) MR No No — 5% of samples — Resolved Nov 30, 2007 Total Coliform Rule
Oct 1, 2007 Dec 31, 2007 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2007 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2007 Dec 31, 2007 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2007 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2006 Dec 31, 2006 TTHM MCL Yes No .082 MG/L 0.080 mg/L .08 Resolved Dec 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2006 Dec 31, 2006 TTHM MCL Yes No .082 MG/L 0.080 mg/L .08 Resolved Dec 31, 2006 Stage 1 Disinfectants and Disinfection Byproducts 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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