The Power of Information

National Drinking Water Database

Combined Uranium (mg/L) in Wisconsin

Uranium is a radioactive element commonly found in most rocks; processed uranium ore is used for power generation and weapons manufacture. [read more]

The Most Polluted Communities in Wisconsin

127 water utilities reported detecting Combined Uranium (mg/L) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Combined Uranium (mg/L) level

RankSystem Population Served Positive test results of total reported tests Average Level
1Viroqua Waterworks
Viroqua, WI
4,3356 of 611.58 ppb
(7 to 21.8 ppb)
2Mattoon Waterworks
Mattoon, WI
4501 of 19.1 ppb
(9.1 ppb)
3Riehls Country Estates
Marshfield, WI
961 of 19 ppb
(9 ppb)
4Nashotah Seminary Apts
Delafield, WI
1501 of 15.2 ppb
(5.2 ppb)
5Winneconne Waterworks
Winneconne, WI
2,3516 of 63.9 ppb
(3 to 4.4 ppb)
6Westshire Farms AT The Lake
Delavan, WI
3001 of 13.7 ppb
(3.7 ppb)
7Deforest Waterworks
De Forest, WI
8,4142 of 23.3 ppb
(3.2 to 3.4 ppb)
8Rock River Leisure Estates Coop
Edgerton, WI
6451 of 13.1 ppb
(3.1 ppb)
9Algoma TN Sanitary Dist #1
Oshkosh, WI
4673 of 32.7 ppb
(1.7 to 4.3 ppb)
10Southern Wisconsin Center
Union Grove, WI
9504 of 42.53 ppb
(2 to 3.2 ppb)

Health Based Limits for Combined Uranium (mg/L)

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 ppb
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.0.5 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.20 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.30 ppb

Violation Summary for Combined Uranium (mg/L) in Wisconsin

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

Violation TypeNumber of Violations
Failure to monitor regularly2