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National Drinking Water Database


Mercury (total inorganic) in Wisconsin


Mercury is a metal from refinery and factory pollution, coal burning, landfill and agricultural runoff and erosion of natural deposits. [read more]

The Most Polluted Communities in Wisconsin

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

Ranked by highest average Mercury (total inorganic) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Generac Power Systems Inc
Waukesha, WI
5001 of 21.93 ppb
(0 to 3.86 ppb)
2Oshkosh Waterworks
Oshkosh, WI
63,0001 of 10.7 ppb
(0.7 ppb)
3Brandybrook Subdivision
Wales, WI
2381 of 10.69 ppb
(0.69 ppb)
4Plum City High School
Plum City, WI
2352 of 20.39 ppb
(0.3 to 0.48 ppb)
5Cochrane Waterworks
Cochrane, WI
4351 of 10.33 ppb
(0.33 ppb)
6Dover Elementary School
Gilmanton, WI
502 of 20.3 ppb
(0.3 to 0.31 ppb)
7Eastman Waterworks
Eastman, WI
4461 of 10.28 ppb
(0.28 ppb)
8Cataract Elementary School
Sparta, WI
1362 of 20.26 ppb
(0.1 to 0.41 ppb)
9Platteville Waterworks
Platteville, WI
9,9891 of 10.25 ppb
(0.25 ppb)
10Genoa Waterworks
Genoa, WI
2641 of 10.25 ppb
(0.25 ppb)

Health Based Limits for Mercury (total inorganic)

StandardDescriptionLevel
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.1.2 ppb
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.2 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.2 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.2 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.2 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.2 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.10 ppb

Violation Summary for Mercury (total inorganic) in Wisconsin

There are no violations reported for this contaminant in Wisconsin