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National Drinking Water Database

Selenium (total) in Illinois

Selenium is a naturally occurring element that contaminates water due to mining or petrolum refining, fly-ash from coal-burning power plants, and irrigation of arid farmland soils high in selenium. [read more]

The Most Polluted Communities in Illinois

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

Ranked by highest average Selenium (total) level

RankSystem Population Served Positive test results of total reported tests Average Level
1Fox Creek Farms Water Company
Brimfield, IL
2131 of 125 ppb
(25 ppb)
2Santa FE Estates Water Association
Chillicothe, IL
841 of 123 ppb
(23 ppb)
3Ridgewood Subdivision
Joliet, IL
2502 of 222.9 ppb
(1.3 to 44.5 ppb)
4Esquire Estates Mhp
Peoria, IL
507 of 719.6 ppb
(6 to 69 ppb)
5IL American-Terra Cotta
Creve Coeur, IL
6841 of 412.5 ppb
(0 to 50 ppb)
6Morton Mobile Home Park
Glen Ellyn, IL
2501 of 212 ppb
(0 to 24 ppb)
7Kankakee Correctional Center
Manteno, IL
2102 of 210 ppb
(7 to 13 ppb)
Winchester, IL
1,6503 of 39.42 ppb
(5.2 to 13.9 ppb)
Toluca, IL
1,4383 of 38.77 ppb
(1.8 to 22 ppb)
Emington, IL
1202 of 37.67 ppb
(0 to 16 ppb)

Health Based Limits for Selenium (total)

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.50 ppb
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.50 ppb
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.50 ppb
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.170 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.200 ppb

Violation Summary for Selenium (total) 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
Failure to monitor regularly7