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National Drinking Water Database


Selenium (total) in Wisconsin


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 Wisconsin

238 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
(Range)
1Mequon City Hall
Mequon, WI
6171 of 212.61 ppb
(0 to 25.23 ppb)
2Bellevue Waterworks
Green Bay, WI
14,5001 of 18 ppb
(8 ppb)
3Itw Filtration
Lake Geneva, WI
801 of 15.7 ppb
(5.7 ppb)
4Mount Calvary Waterworks
Mount Calvary, WI
5581 of 14.75 ppb
(4.75 ppb)
5Northwestern High School
Maple, WI
4481 of 24.55 ppb
(0 to 9.1 ppb)
6Grassland Dairy Prod Inc
Greenwood, WI
2002 of 24.44 ppb
(4.38 to 4.5 ppb)
7Learning Depot
Whitewater, WI
801 of 14.3 ppb
(4.3 ppb)
8Sbc Service
Racine, WI
501 of 23.1 ppb
(0 to 6.2 ppb)
9Prairie Farm High School
Prairie Farm, WI
3502 of 23.05 ppb
(3 to 3.1 ppb)
10Maine Elementary School
Wausau, WI
2551 of 23 ppb
(0 to 6 ppb)

Health Based Limits for Selenium (total)

StandardDescriptionLevel
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 Wisconsin

There are no violations reported for this contaminant in Wisconsin