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National Drinking Water Database

Copper in Wisconsin

Copper is a naturally occuring metal and drinking water contaminant that enters tap water by corrosion of household plumbing systems and erosion of natural deposits. [read more]

The Most Polluted Communities in Wisconsin

1,720 water utilities reported detecting Copper in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Copper level

RankSystem Population Served Positive test results of total reported tests Average Level
1Western Technical College-Sparta
Sparta, WI
1091 of 14645 ppb
(4645 ppb)
2Three Angels Christian Schl & Madison Seventh Day
Madison, WI
1755 of 51758.02 ppb
(138.67 to 5085 ppb)
3Curt Manufacturing
Eau Claire, WI
556 of 61722.47 ppb
(65.8 to 4594 ppb)
4Ocean Spray Cranberry, Inc.
Tomah, WI
505 of 51531.12 ppb
(42.22 to 7055 ppb)
5WI Dnr Rocky Arbor A Bldg
Wisconsin Dells, WI
1253 of 31517.94 ppb
(74 to 3212.33 ppb)
6J & D Manufacturing
Eau Claire, WI
556 of 61354.75 ppb
(317 to 2420 ppb)
7Ntc Christian Academy
Merrill, WI
1509 of 91286.49 ppb
(908 to 2186.67 ppb)
8Lebanon Lutheran School - ST Peters Bldg
Lebanon, WI
2423 of 31274.63 ppb
(46.4 to 3700 ppb)
9WI Air National Guard Volk Field
Camp Douglas, WI
4005 of 51268.52 ppb
(26.13 to 6010 ppb)
10Reedsville Waterworks
Reedsville, WI
1,2008 of 81242.56 ppb
(957.5 to 1641.07 ppb)

Health Based Limits for Copper

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.300 ppb
National Secondary Drinking Water RegulationsA National Secondary Drinking Water Regulation is a non-enforceable guideline regarding contaminants that may cause cosmetic effects (such as taste, odor, or color). Some states choose to adopt them as enforceable standards. Source: U.S. Environmental Protection Agency. 1000 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.1300 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.1300 ppb

Violation Summary for Copper in Wisconsin

There are no violations reported for this contaminant in Wisconsin