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Connecticut

  • 506 Utilities

  • Serving: 2,709,000

  • Data available: 2010-2015

  • Contaminants Found: 80

 

EWG's drinking water quality report for Connecticut shows results of tests conducted by the water utilities in Connecticut and provided to EWG by the Connecticut Department of Public Health.

LARGE UTILITIES
ALL UTILITIES WITH VIOLATIONS
LARGE UTILITIES WITH VIOLATIONS

Below are utilities in Connecticut serving over 10,000 people, listed alphabetically. Click the "more" button below to get the full list of utilities serving over 10,000 people.

Large utilities in Connecticut

UtilityLocationPeople
Served
Aquarion Water Company of Connecticut - Canaan SysNew Canaan, CT10,097
Aquarion Water Company of Connecticut - Greenwich SystemGreenwich, CT52,959
Aquarion Water Company of Connecticut - Main SystemBridgeport, CT351,731
Aquarion Water Company of Connecticut - MysticStonington, CT10,692
Aquarion Water Company of Connecticut - Noroton SystemDarien, CT17,675
Aquarion Water Company of Connecticut - Simsbury SystemSimsbury, CT12,566
Aquarion Water Company of Connecticut - StamfordStamford, CT99,415
Aquarion Water Company of Connecticut - Valley SystemSeymour, CT13,080
Avon Water CompanyAvon, CT11,590
Bristol Water DepartmentBristol, CT52,079
Connecticut Water Company - Northern Region-Western SystemEast Windsor, CT97,690
Cromwell Fire District Water DepartmentCromwell, CT14,316
CTWC - Naugatuck Region-Central SystemNaugatuck, CT22,108
CTWC - Shoreline Region-Guilford SystemGuilford, CT33,197
CTWC - Unionville SystemFarmington, CT14,693
Danbury Water DepartmentDanbury, CT62,055
East Lyme Water & Sewer CommissionEast Lyme, CT15,245
Groton UtilitiesGroton, CT30,200
Hazardville Water CompanyEnfield, CT18,544
Manchester Water DepartmentManchester, CT51,066
Meriden Water DivisionMeriden, CT58,441
Metropolitan District CommissionHartford, CT390,887
Middletown Water DepartmentMiddletown, CT41,019
New Britain Water DepartmentNew Britain, CT73,164
New London Department of Public UtilitiesNew London, CT26,273
Norwalk First Taxing DistrictNorwalk, CT40,256
Norwich Public UtilitiesNorwich, CT36,067
Regional Water AuthorityNew Haven, CT418,900
South Norwalk Electric and WaterNorwalk, CT42,000
Southington Water DepartmentSouthington, CT43,069
More

Utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 in Connecticut

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople
Served
Violation
Points
Nod Hill ApartmentsClinton, CT4842
Northstone GardensNorth Stonington, CT7921
East Windsor Housing AuthorityEast Windsor, CT9414
Ashford Hills ApartmentsAshford, CT13613
Norwich Public UtilitiesNorwich, CT36,06712
Southeastern Connecticut Water Authority, North Stonington Division (nst)North Stonington, CT1,86011
Oakridge Gardens LLCMontville, CT7010
Countryside ApartmentsWolcott, CT2189
Hemlock ApartmentsEssex, CT729
890 Boston TurnpikeBolton, CT608
Fawn Ridge Association Inc.Woodstock, CT367
Meadowbrook Terrace Mobile Home ParkNewtown, CT1587
Mountview ApartmentsMontville, CT1057
Pickett Road ApartmentsPlainfield, CT257
Aquarion Water Company of Ct-judea MainWashington, CT3256
Evangelical Christian Center - MainAshford, CT846
Mile Creek ApartmentsOld Lyme, CT606
Brookview Water CompanyRidgefield, CT556
Lakeview Mobile Home ParkGriswold, CT996
Woodstock Housing AuthorityWoodstock, CT266
Dodge FarmWashington, CT426
Canaan Water DepartmentCanaan, CT4885
166 & 180 Boston TurnpikeBolton, CT315
Miami Beach Water CompanyOld Lyme, CT4405
Cedar Terrace Prop Owners AssociationDanbury, CT665
Holly House ApartmentsWoodbury, CT755
Cornwall Water CompanyCornwall, CT485
Woodcrest Association Inc.Burlington, CT605
Marlborough Health Care Center Inc.Marlborough, CT1655
Moosup Pond Terrace LLCPlainfield, CT465

Large utilities that accumulated/accrued the most violation points as of October 2014 to September 2017 in Connecticut

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople
Served
Violation
Points
Norwich Public UtilitiesNorwich, CT36,06712
Waterford WPCAWaterford, CT16,5784
Meriden Water DivisionMeriden, CT58,4413
Avon Water CompanyAvon, CT11,5902
New London Department of Public UtilitiesNew London, CT26,2732
University of Connecticut - Main CampusMansfield, CT28,4802
Valley Water Systems, Inc.Plainville, CT18,2312
East Lyme Water & Sewer CommissionEast Lyme, CT15,2452
Metropolitan District CommissionHartford, CT390,8871
CTWC - Unionville SystemFarmington, CT14,6931
Southington Water DepartmentSouthington, CT43,0691
Aquarion Water Company of Connecticut - Valley SystemSeymour, CT13,0801
Regional Water AuthorityNew Haven, CT418,9001
Danbury Water DepartmentDanbury, CT62,0551
Manchester Water DepartmentManchester, CT51,0661
Cromwell Fire District Water DepartmentCromwell, CT14,3161

Contaminants found in Connecticut above health guidelines

Found above health guidelinesFound
Contaminant# of UtilitiesPeople Served# of UtilitiesPeople Served

Total trihalomethanes (TTHMs)
2052,654,0772112,656,273

Bromodichloromethane
1872,619,1211982,640,752

Chloroform
1432,541,8191932,639,840

Chromium (hexavalent)
732,490,904742,526,971

Dibromochloromethane
1571,502,8741912,443,789

Radium-228
1331,004,0621331,004,062

Tetrachloroethylene (perchloroethylene)
7144,1647144,164

Radium-226
40138,37050247,664

Arsenic
36138,14136138,141

Chlorate
14122,148712,478,634

Chlorite
487,851487,851

Uranium
21283,620239247,127

Strontium-90
460,087560,588

1,4-Dioxane
356,71111648,502

1,2,3-Trichloropropane
251,128363,694

Tritium
133,197438,828

Trichloroethylene
315,55610185,116

Chlordane
111,590111,590

Bromoform
43,214102884,734

Nitrate
112,6104062,672,917

Antimony
22773425

Chloromethane
126538259,394

Ethylene dibromide
177177

Cadmium
152152

Di(2-ethylhexyl) phthalate
12669,093

Contaminants found in Connecticut above legal limits

Contaminant# of UtilitiesPeople Served

Arsenic
166

Uranium
148