The Power of Information

National Drinking Water Database

Combined Radium (-226 & -228) in Illinois

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

The Most Polluted Communities in Illinois

918 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
Gurnee, IL
31,0001 of 114.7 pCi/L
(14.7 pCi/L)
2Villa Park
Villa Park, IL
22,5171 of 113.1 pCi/L
(13.1 pCi/L)
3Arlington Heights
Arlington Heights, IL
76,9431 of 112.6 pCi/L
(12.6 pCi/L)
Grayslake, IL
20,3302 of 212.31 pCi/L
(10.8 to 13.82 pCi/L)
5Mount Prospect
Mt Prospect, IL
40,9041 of 112.1 pCi/L
(12.1 pCi/L)
6Stateville Correctional Center
Joliet, IL
3,5001 of 111.9 pCi/L
(11.9 pCi/L)
7IL American-Waycinden
Creve Coeur, IL
1,8691 of 111.8 pCi/L
(11.8 pCi/L)
8Wildlife Mhp
Dwight, IL
7321 of 2111.69 pCi/L
(9.3 to 13.7 pCi/L)
9Elm Oak Mutual Water System
Lake Forest, IL
8020 of 2010.97 pCi/L
(2.89 to 15 pCi/L)
10Edelstein Water Coop
Edelstein, IL
12515 of 1610.89 pCi/L
(0 to 15 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 Illinois

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

Violation TypeNumber of Violations
Over maximum contaminant level, Average1,055
Failure to monitor regularly113