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National Drinking Water Database

Lead (total) in Connecticut

Lead is a metal that enters water by corrosion of household plumbing systems, discharge of industrial pollution and erosion of natural deposits. [read more]

The Most Polluted Communities in Connecticut

462 water utilities reported detecting Lead (total) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Lead (total) level

RankSystem Population Served Positive test results of total reported tests Average Level
1Middlebury Commons
Middlebury, CT
763 of 418.43 ppb
(0 to 37.5 ppb)
2Walden Iii Condominiums
Hamden, CT
1432 of 217.65 ppb
(1.8 to 33.5 ppb)
3Freedom Village Elderly Housing
Uncasville, CT
433 of 517.4 ppb
(0 to 57 ppb)
4Woodstock Meadows Condominium Assn.
Woodstock, CT
1809 of 1017.4 ppb
(0 to 65 ppb)
5Jewett City Water Company
Enfield, CT
6,6203 of 616.24 ppb
(0 to 95 ppb)
6Residences AT Crow Hill, System #1
Uncasville, CT
14421 of 2213.17 ppb
(0 to 69 ppb)
7Hebron Arms Apartments
Wethersfield, CT
391 of 213 ppb
(0 to 26 ppb)
8Plainfield Housing Authority
Moosup, CT
445 of 712.15 ppb
(0 to 64 ppb)
9Pond View Apartments
Bridgeport, CT
1502 of 29.4 ppb
(1.8 to 17 ppb)
10Killingly Industrial Park
Danielson, CT
5003 of 39.38 ppb
(0.4 to 19.23 ppb)

Health Based Limits for Lead (total)

Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.0 ppb
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.0.2 ppb

Violation Summary for Lead (total) in Connecticut

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Connecticut since 2004

Violation TypeNumber of Violations
Failure to monitor regularly3