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SOUTH NORWALK ELECTRIC & WATER

Connecticut — Community Water System — PWSID: CT1030021

System Information

PWSIDCT1030021
System NameSOUTH NORWALK ELECTRIC & WATER
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypeLocal
EPA Region01
Serves SchoolNo
WholesalerNo
First ReportedMar 8, 1979
Last ReportedDec 15, 2025

Location & Contact

StateConnecticut
CityWILTON
ZIP Code06897
Address164 Old Boston Road
OrganizationBURNS, ELISABETH O.
Phone203-866-3366

Population & Service

Population Served42,000
Service Connections9,682

Drinking Water Violations (215)

This water system has 215 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, 2024 — Consumer Confidence Rule Other No No — — — Resolved Aug 13, 2024 Consumer Confidence Rule
Aug 10, 2024 — Consumer Confidence Rule Other No No — — — Resolved Aug 13, 2024 Consumer Confidence Rule
Jul 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Aug 12, 2024 Consumer Confidence Rule
Jul 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Aug 12, 2024 Consumer Confidence Rule
Jan 1, 2019 Mar 31, 2019 CARBON, TOTAL TT Yes No — TT — Archived Mar 31, 2019 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 CARBON, TOTAL TT Yes No — TT — Archived Mar 31, 2019 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 CARBON, TOTAL TT Yes No — TT — Archived Mar 31, 2019 Stage 1 Disinfectants and Disinfection Byproducts Rule
Aug 10, 2009 — Consumer Confidence Rule Other No No — — — Resolved Oct 28, 2009 Consumer Confidence Rule
Aug 10, 2009 — Consumer Confidence Rule Other No No — — — Resolved Oct 28, 2009 Consumer Confidence Rule
Jul 1, 2009 — Consumer Confidence Rule Other No No — — — Resolved Oct 28, 2009 Consumer Confidence Rule
Jul 1, 2009 — Consumer Confidence Rule Other No No — — — Resolved Oct 28, 2009 Consumer Confidence Rule
Aug 10, 2008 — Consumer Confidence Rule Other No No — — — Resolved Oct 28, 2009 Consumer Confidence Rule
Aug 10, 2008 — Consumer Confidence Rule Other No No — — — Resolved Oct 28, 2009 Consumer Confidence Rule
Jul 1, 2008 — Consumer Confidence Rule Other No No — — — Resolved Jul 9, 2008 Consumer Confidence Rule
Jul 1, 2008 — Consumer Confidence Rule Other No No — — — Resolved Jul 9, 2008 Consumer Confidence Rule
Nov 1, 2006 Nov 30, 2006 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Nov 30, 2006 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Nov 1, 2006 Nov 30, 2006 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Nov 30, 2006 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Nov 1, 2006 Nov 30, 2006 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Nov 30, 2006 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Nov 1, 2006 Nov 30, 2006 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Nov 30, 2006 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2006 — Consumer Confidence Rule Other No No — — — Resolved Aug 1, 2006 Consumer Confidence Rule
Jul 1, 2006 — Consumer Confidence Rule Other No No — — — Resolved Aug 1, 2006 Consumer Confidence Rule
Apr 1, 2006 Jun 30, 2006 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2006 Jun 30, 2006 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2006 Jun 30, 2006 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2006 Jun 30, 2006 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2006 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2001 Dec 31, 2001 Toxaphene MR No Yes — 0.003 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Glyphosate MR No Yes — 0.7 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Diquat MR No Yes — 0.02 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Aldicarb sulfoxide MR No Yes — — — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Aldicarb sulfoxide MR No Yes — — — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Aldicarb sulfoxide MR No Yes — — — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Aldicarb MR No Yes — — — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Aldicarb MR No Yes — — — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals
Oct 1, 2001 Dec 31, 2001 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Dec 31, 2001 Synthetic Organic Chemicals

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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