Connecticut Water Quality
Health violation data for 503 community water systems in Connecticut. Based on EPA Safe Drinking Water Information System (SDWIS) data.
Water Systems
503
Total Violations
749
Systems with Violations
50
Cities with Issues
109
Water Systems with Most Violations
| # | Water System | Violations | Health |
|---|---|---|---|
| 1 | MEADOWS AT CROSS RIVER Bethel | 90 | Yes |
| 2 | 31 GRIST MILL RD Old Lyme | 18 | Yes |
| 3 | NORWICH PUBLIC UTILITIES Norwich | 18 | Yes |
| 4 | PINECREST CONDOMINIUMS East Hartford | 16 | Yes |
| 5 | ROCK TERRACE TRAILER PARK Stamford | 15 | Yes |
| 6 | JUNIPER CLUB INC. Bloomfield | 13 | Yes |
| 7 | HUBBARD HILL APARTMENTS Canterbury | 11 | Yes |
| 8 | ORCHARD ACRES ASSOCIATION East Hartford | 10 | Yes |
| 9 | MARIANAPOLIS PREP SCHOOL - ST ALBERTS Thompson | 10 | Yes |
| 10 | TOLLAND WATER DEPT - TORRY ROAD Tolland | 10 | Yes |
| 11 | ABENAKI WATER/WHITE ROCK WATER Monroe | 10 | Yes |
| 12 | ELMWOOD COURT, LLC Danbury | 9 | Yes |
| 13 | Mashantucket Pequot Water System Mashantucket | 8 | Yes |
| 14 | LAKE LILLINONAH SHORES CONDOS Brookfield | 8 | Yes |
| 15 | TWIN HILLS WATER DISTRICT Bolton | 8 | Yes |
| 16 | KNOLLCREST TAX DISTRICT New Fairfield | 8 | Yes |
| 17 | WOODLAND SUMMIT COMMUNITY WATER ASSN Tolland | 8 | Yes |
| 18 | 39 HOP BROOK RD - APT COMPLEX Danbury | 7 | Yes |
| 19 | CONRADS PARK Brooklyn | 7 | Yes |
| 20 | SUNNY VALLEY TAX DISTRICT New Milford | 7 | Yes |
| 21 | CHELSEA FAMILY HOUSING West Hartford | 7 | Yes |
| 22 | BROOKFIELD HILLS CONDOMINIUM UNIT OWNERS Danbury | 6 | Yes |
| 23 | AQUARION-FALLS VILLAGE Shelton | 6 | Yes |
| 24 | CAMPBELL HEIGHTS APARTMENTS Norwich | 6 | Yes |
| 25 | YESHIVA OF WATERBURY-DURHAM CAMPUS Waterbury | 6 | Yes |
| 26 | MOOSUP MANOR Dayville | 6 | Yes |
| 27 | QUINEBAUG MOBILE HOME PARK Quinebaug | 6 | Yes |
| 28 | ARROWHEAD BY THE LAKE ASSOCIATION, INC. Seymour | 6 | Yes |
| 29 | LINDHBROOK WATER COMPANY Harwinton | 6 | Yes |
| 30 | WOODLAWN APARTMENTS East Hartford | 5 | Yes |
| 31 | ORCHARD HILL ASSOCIATION Bloomfield | 5 | Yes |
| 32 | 298-302 ALBANY TURNPIKE Canton | 5 | Yes |
| 33 | CTWC - WESTCHESTER EAST Clinton | 5 | Yes |
| 34 | HEBRON ARMS APARTMENTS Andover | 5 | Yes |
| 35 | LEDYARD WPCA - LEDYARD CENTER Ledyard | 5 | Yes |
| 36 | LAKESIDE MANOR APARTMENTS Stamford | 5 | Yes |
| 37 | BOXWOOD CONDOMINIUM ASSOCIATION Jewett City | 5 | Yes |
| 38 | THOMPSON HILL WATER CO - PAULA LANE DIV Thompson | 5 | Yes |
| 39 | VOLUNTOWN HOUSING AUTHORITY Voluntown | 5 | Yes |
| 40 | RIDGEVIEW HEIGHTS East Hartford | 5 | Yes |
| 41 | WACCABUC FARMS INC. Westport | 5 | Yes |
| 42 | CHELSEA ELDERLY HOUSING West Hartford | 5 | Yes |
| 43 | BIRCH LANDING CONDOMINIUM Manchester | 5 | Yes |
| 44 | MAR-LEA PARK APARTMENTS East Hartford | 4 | Yes |
| 45 | CEDAR TERRACE PROP OWNERS ASSN Danbury | 4 | Yes |
| 46 | CHESTELM HEALTH & REHABILITATION CENTER Moodus | 4 | Yes |
| 47 | EAST WINDSOR HOUSING AUTHORITY Broad Brook | 4 | Yes |
| 48 | MAPLEWOOD-MILLBROOK APARTMENTS Storrs | 4 | Yes |
| 49 | MERIDEN WATER DIVISION Meriden | 4 | Yes |
| 50 | FOX LAUREL MOBILE HOME PARK, LLC Oakdale | 4 | Yes |
Most Common Contaminants in Connecticut
| Contaminant | Violations | Systems Affected |
|---|---|---|
| E. coli | 194 | 64 |
| Gross Alpha | 121 | 121 |
| Combined Radium 226/228 | 120 | 76 |
| Di(2-ethylhexyl) phthalate | 50 | 2 |
| Total Coliform (RTCR) | 44 | 15 |
| Selenium | 42 | 1 |
| Total Trihalomethanes (TTHM) | 36 | 6 |
| Fluoride | 34 | 21 |
| Barium | 31 | 4 |
| Arsenic | 20 | 11 |
| Dibutyl phthalate | 13 | 2 |
| Lead & Copper Rule | 12 | 4 |
| Haloacetic Acids (HAA5) | 5 | 3 |
| Benzene | 4 | 2 |
| Contaminant 1074 | 4 | 1 |
Cities with Water Quality Issues
Avon Bloomfield East Granby Farmington Glastonbury Berlin Manchester Bolton New Hartford Simsbury South Windsor Stafford Springs Winsted East Hartford West Hartford Willimantic Dayville Woodstock Pomfret Putnam Gales Ferry Norwich Uncasville Chester Durham Meriden Middletown Monroe Newtown Orange Portland Seymour Shelton Southbury Wallingford West Haven Waterbury Prospect Torrington Harwinton +69 more
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About This Data
Water quality data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. Only community water systems (CWS) in Connecticut are included.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.