STATE REPORT CT 3 ALERTS 64 HEALTH VIOLATIONS

Connecticut Water Quality & Safety Report

34 ZIP codes · 83 water systems · IPC plumbing code · Updated 2026-03-16

Data: EPA SDWIS, NWS, State plumbing boards, Rewiring America Last verified: 2026-03-16

ZIP Codes

Water Systems

ZIPs with Violations

Active Alerts

IPC

Plumbing Code

Overview

We track water quality, weather alerts, plumbing regulations, and energy rebates for 34 ZIP codes across Connecticut, covering 83 community water systems that serve approximately 1,405,628 people.

30 of 34 ZIP codes (88%) have recorded EPA violations. 64 health-based violations have been documented.

Active Weather Alerts

3 active alerts in Connecticut. Severe weather can directly affect tap water quality — flooding, power outages, and infrastructure damage may lead to boil-water advisories.

Alert	Severity	Areas
Flood Watch	Severe	Northern Fairfield; Northern New Haven; Northern Middlese…
Flood Watch	Severe	Hartford; Tolland; Windham; Western Franklin; Eastern Fra…
Flood Watch	Severe	Northern Litchfield; Southern Litchfield; Northern Berksh…

View all Connecticut alerts →

Plumbing Regulations

Connecticut follows the International Plumbing Code (2018 edition).

Plumbing code: IPC (2018)
Homeowner DIY: Licensed plumber required
Water heater permit: Required
Annual backflow test: Required

Full Connecticut regulations →

Areas with Most Violations

ZIP Code	City	Safety Score	Violations	Health-Based	System
06810	Danbury	—	467	2	DANBURY WATER DEPARTMENT
06492	Wallingford	—	252	3	WALLINGFORD WATER DEPARTMENT
06801	Bethel	—	197	2	BETHEL WATER DEPT
06901	Stamford	—	131	3	CANDLE HILL MOBILE HOME PARK
06790	Torrington	—	111	3	BARKHAMSTED HILLS LLC
06278	Ashford	—	65	4	CTWC - ASHFORD PARK DIVISION
06082	Enfield	—	54	1	HAZARDVILLE WATER COMPANY
06701	Waterbury	—	47	4	WATERBURY WATER DEPARTMENT
06002	Bloomfield	—	45	14	JUNIPER CLUB INC.
06040	Manchester	—	41	0	MANCHESTER WATER DEPARTMENT

Areas with No Violations

ZIP Code	City	Safety Score	System	Population
06078	Suffield	—	AQUARION-SUFFIELD	595
06501	New Haven	—	REGIONAL WATER AUTHORITY	418,900
06751	Bethlehem	—	NORTH PURCHASE ELDERLY HOUSING	72
06830	Greenwich	—	BRUNSWICK SCHOOL (LOWER & LOWER MIDDLE)	567

Lead & Copper

0 ZIP codes exceed the EPA lead action level

Radon Risk

High risk (Zone 1): 0 ZIP codes (0%)
Moderate risk (Zone 2): 0 ZIP codes
Low risk (Zone 3): 0 ZIP codes

All 34 ZIP Codes in Connecticut

06232 (Andover) — 40 violations ⚠
06278 (Ashford) — 65 violations ⚠
06001 (Avon) — 6 violations ⚠
06330 (Baltic) — 7 violations
06750 (Bantam) — 40 violations
06801 (Bethel) — 197 violations ⚠
06751 (Bethlehem)
06002 (Bloomfield) — 45 violations ⚠
06405 (Branford) — 2 violations
06010 (Bristol) — 10 violations
06408 (Cheshire) — 27 violations ⚠
06810 (Danbury) — 467 violations ⚠
06108 (East Hartford) — 32 violations ⚠
06082 (Enfield) — 54 violations ⚠
06824 (Fairfield) — 11 violations ⚠
06030 (Farmington) — 3 violations ⚠
06830 (Greenwich)
06340 (Groton) — 30 violations
06101 (Hartford) — 2 violations
06040 (Manchester) — 41 violations
06450 (Meriden) — 8 violations ⚠
06457 (Middletown) — 20 violations ⚠
06050 (New Britain) — 2 violations
06501 (New Haven)
06111 (Newington) — 27 violations
06850 (Norwalk) — 2 violations ⚠
06877 (Ridgefield) — 6 violations
06901 (Stamford) — 131 violations ⚠
06078 (Suffield)
06790 (Torrington) — 111 violations ⚠
06611 (Trumbull) — 8 violations
06492 (Wallingford) — 252 violations ⚠
06701 (Waterbury) — 47 violations ⚠
06109 (Wethersfield) — 3 violations

Data Sources

Water quality: EPA Safe Drinking Water Information System (SDWIS)
Weather alerts: National Weather Service (NWS)
Regulations: State plumbing boards, ICC, IAPMO
Rebates: Rewiring America

Updated daily.

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