Milton L. Kapp Generating Station

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Milton L. Kapp Generating Station has 6 groundwater monitoring wells, 6 of which have been polluted above federal advisory levels based on samples collected between March 28, 2018 and December 10, 2019. Groundwater at this site contains unsafe levels of boron, molybdenum, lithium, sulfate and arsenic.

Site description

Interstate Power and Light’s (a subsidiary of Alliant Energy) Milton L. Kapp Generating Station is in Clinton, Iowa River in Clinton County. The facility was originally constructed in 1947, with two coal-fired units and a net capacity of 237-MW at its peak. Both units were retired in 2010 and 2018, respectively. The plant has two unlined ash ponds and an unlined ash landfill. The ash ponds were constructed in the 1970's, and the landfill was constructed in the mid-1980's. Groundwater beneath the site generally flows toward the west-northwest. Lansing’s Upper Ash Pond is scheduled to be closed by October 17, 2023 by a combination of CCR removal, consolidation, and in-place closure with a cap. You can find the industry-reported data here.

For more information about the Milton L. Kapp Generating Station, see EIP's 2019 National Coal Ash Report.

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
6 / 6
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 lithium molybdenum sulfate
Pollutants monitored and below guidelines
antimony barium beryllium cadmium chromium cobalt fluoride lead mercury radium selenium thallium
Pollutants not monitored
ammonia, copper, cyanide, gross alpha particle, gross beta particle, hexavalent chromium, manganese, nickel, nitrate, nitrite, silver, strontium, tritium, uranium

Facility last updated on Wednesday, November 02, 2022 10:18:01 AM EDT