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EWG's Tap Water Database — 2019 UPDATE

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Connecticut

  • 502 Utilities

  • Serving: 2,713,000

  • Data available: 2012-2017

  • Contaminants Found: 105

 

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 SysBridgeport, CT10,097
Aquarion Water Company of Connecticut - Greenwich SystemBridgeport, CT53,041
Aquarion Water Company of Connecticut - Main SystemBridgeport, CT351,756
Aquarion Water Company of Connecticut - MysticBridgeport, CT10,784
Aquarion Water Company of Connecticut - Noroton SystemBridgeport, CT18,737
Aquarion Water Company of Connecticut - Simsbury SystemBridgeport, CT14,679
Aquarion Water Company of Connecticut - StamfordBridgeport, CT99,415
Aquarion Water Company of Connecticut - Valley SystemBridgeport, CT13,080
Avon Water CompanyClinton, CT11,590
Bristol Water DepartmentBristol, CT52,079
Connecticut Water Company - Northern Region-Western SystemClinton, CT98,390
Cromwell Fire District Water DepartmentCromwell, CT14,316
CTWC - Naugatuck Region-Central SystemClinton, CT22,108
CTWC - Shoreline Region-Guilford SystemClinton, CT33,197
CTWC - Unionville SystemClinton, CT14,693
Danbury Water DepartmentDanbury, CT62,055
East Lyme Water & Sewer CommissionNiantic, 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, CT73,534
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 WaterWilton, CT42,000
Southington Water DepartmentSouthington, CT43,069
More

Utilities that accumulated/accrued the most violation points as of April 2016 to March 2019 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
Mountview ApartmentsMonsey, CT10553
Country ManorNorton, CT6653
Northstone GardensStamford, CT7948
Arrowhead By The Lake Association Inc.Wolcott, CT28844
Candlewood Trails Association Inc.New Milford, CT31241
890 Boston TurnpikeTolland, CT6040
Fawn Ridge Association Inc.Woodstock, CT3639
Bethel Water DepartmentBethel, CT9,50734
Oakridge Gardens LLCGroton, CT7033
Elmwood Court LLCDanbury, CT5430
East Windsor Housing AuthorityBroad Brook, CT9428
South Kent SchoolSouth Kent, CT22827
Weston Water SupplyWeston, CT10027
Miami Beach Water CompanyOld Lyme, CT44026
Cornwall Water CompanyCornwall Bridge, CT4825
Voluntown Housing AuthorityVoluntown, CT4224
Hawthorne Terrace AssociationDanbury, CT15624
Canaan Water DepartmentFalls Village, CT48822
Southbury Training SchoolSouthbury, CT1,60621
Connecticut Water Company - General Water DivisionClinton, CT30620
Brookwood ApartmentsMarblehead, CT4420
Lyme Academy Apartments LLCTrumbull, CT4820
Wolcott Water DepartmentWolcott, CT2,55019
Ashford Hills ApartmentsStorrs, CT13618
Campbell Heights Apartments - System #2Norwich, CT15218
Jumbo ApartmentsPomfret Center, CT3517
Gibson Hill ParkSterling, CT14017
Montville Water SupplyUncasville, CT1,30017
Woodhaven ApartmentsEast Hartford, CT48917
Moosup ManorDayville, CT2716

Large utilities that accumulated/accrued the most violation points as of April 2016 to March 2019 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
New Britain Water DepartmentNew Britain, CT73,53410
Aquarion Water Company of Connecticut - MysticBridgeport, CT10,78410
Danbury Water DepartmentDanbury, CT62,0557
New London Department of Public UtilitiesNew London, CT26,2736
Avon Water CompanyClinton, CT11,5905
Aquarion Water Company of Connecticut - Greenwich SystemBridgeport, CT53,0414
Aquarion Water Company of Connecticut - StamfordBridgeport, CT99,4152
Manchester Water DepartmentManchester, CT51,0662
CTWC - Unionville SystemClinton, CT14,6931
Bristol Water DepartmentBristol, CT52,0791
Aquarion Water Company of Connecticut - Valley SystemBridgeport, CT13,0801
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)
2272,666,9632272,666,963

Bromodichloromethane
2292,660,0572302,660,185

Haloacetic acids (HAA5)
2042,659,4732042,659,473

Dibromochloromethane
2232,610,7832272,657,372

Chloroform
2072,604,8772362,659,292

Chromium (hexavalent)
702,471,360712,507,427

Dichloroacetic acid
1622,286,5111632,300,827

Trichloroacetic acid
1222,214,2421232,225,832

Nitrate
3621,938,8664692,697,787

Nitrate and nitrite
3621,877,5034672,704,942

Dibromoacetic acid
1211,543,7521241,687,596

Radium, combined (-226 & -228)
144557,725145560,822

Bromoform
78231,6301471,517,202

Arsenic
78226,56278226,562

Tetrachloroethylene (perchloroethylene)
7132,64511228,340

Chlorite
9123,0658121,765

Chlorate
11111,900682,459,090

Uranium
20077,790229327,511

1,4-Dioxane
356,71111648,502

Bromate
251,128251,128

1,2,3-Trichloropropane
137,2674103,074

Thallium
12,56712,567

Bromochloroacetic acid
12,55012,550

Antimony
32,32073,014

Glyphosate
11,47711,477

Cadmium
39203920

Manganese
371117141,935

Strontium-90
3442410,170

Chloromethane
126543318,033

Di(2-ethylhexyl) phthalate
21981411,488

Styrene
148437,785

Contaminants found in Connecticut above legal limits

Contaminant# of UtilitiesPeople Served