Columbia Energy Center

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Columbia Energy Center has 27 groundwater monitoring wells, 6 of which have been polluted above federal advisory levels based on samples collected between April 13, 2010 and April 14, 2015. Groundwater at this site contains unsafe levels of molybdenum, selenium, arsenic, sulfate, manganese and boron.

Site description

Columbia Energy Center is a 1023-MW coal-fired power station owned by Alliant Energy. The station began operating in 1975 and is located along the Wisconsin River in Pardeeville, Wisconsin. The station has four units regulated under the CCR rule. There are two surface impoundments, Primary Ash Pond and the inactive Secondary Pond. There are also two landfills: COL Dry Ash Disposal Facility Module 1, 2 and 3, all of which are regulated as a single unit, and COL Dry Ash Disposal Facility Module 4. The Columbia Energy Center is listed among the U.S. EPA's proven damage cases, indicating that it has polluted groundwater or surface water at levels which threaten human health and the environment. Columbia Energy Center is due to be retired in 2024.

You can find the industry-reported data here. For more information on the Columbia Energy Center, see EIP’s 2019 National Coal Ash Report.

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
6 / 27
Wells not shown Locations for the following wells are unavailable:

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No exceedances
One or more exeedances
No data available
Other designation
Well "halo" size corresponds to mean concentration. Please note that some wells may not be visible on the map due to overlapping locations.
Pollutants monitored and above guidelines
Tip: Click on a contaminant to view wells that have recorded exceedances. Click again to remove the filter. arsenic boron manganese molybdenum selenium sulfate
Pollutants monitored and below guidelines
barium cadmium chromium mercury nitrate
Pollutants not monitored
ammonia, antimony, beryllium, cobalt, copper, cyanide, fluoride, gross alpha particle, gross beta particle, hexavalent chromium, lead, lithium, nickel, nitrite, radium, silver, strontium, thallium, tritium, uranium

Facility last updated on Wednesday, October 26, 2022 10:06:15 AM EDT