The Power of Information

National Drinking Water Database

Combined Radium (-226 & -228) in Connecticut

Radium is a radioactive element usually found around uranium deposits. [read more]

The Most Polluted Communities in Connecticut

330 water utilities reported detecting Combined Radium (-226 & -228) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Combined Radium (-226 & -228) level

RankSystem Population Served Positive test results of total reported tests Average Level
1Wildwood Water Company
Old Lyme, CT
1321 of 114.3 pCi/L
(14.3 pCi/L)
2Newbury Crossing Condominium Assn, Inc
Southbury, CT
1323 of 312.32 pCi/L
(10.08 to 14.76 pCi/L)
3Woodhall School, Inc
Bethlehem, CT
682 of 38.64 pCi/L
(0 to 13.63 pCi/L)
4Ledgewood Condominium Assn - Boxwood Dr
Southbury, CT
3615 of 158.28 pCi/L
(5.71 to 11.3 pCi/L)
5The Marvelwood School-Faculty Houses
253 of 57.35 pCi/L
(0 to 14.63 pCi/L)
6Meadowbrook Terrace Mobile Home Park
New Haven, CT
1587 of 77.02 pCi/L
(2.7 to 8.28 pCi/L)
7Ledgewood Condominium Assn-Douglas Drive
Southbury, CT
5016 of 165.46 pCi/L
(1.41 to 8.54 pCi/L)
820 Station Road - Apt Building
Brookfield, CT
271 of 14.85 pCi/L
(4.85 pCi/L)
9Candlewood Lake Condominium Assn., Inc.
Danbury, CT
1968 of 84.2 pCi/L
(2.87 to 7 pCi/L)
10Canaan Water Dept
Falls Village, CT
4849 of 93.44 pCi/L
(0.83 to 8.25 pCi/L)

Health Based Limits for Combined Radium (-226 & -228)

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 pCi/L
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.5 pCi/L

Violation Summary for Combined Radium (-226 & -228) 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 regularly236
Over maximum contaminant level, Average87
Over maximum contaminant level, Single Sample1