Caledonia Ash Landfill

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Caledonia Ash Landfill has 18 groundwater monitoring wells, 9 of which have been polluted above federal advisory levels based on samples collected between January 25, 2010 and November 05, 2019. Groundwater at this site contains unsafe levels of molybdenum.

Site description

Caledonia Ash Landfill, regulated under the CCR rule, receives CCR from Oak Creek Power Station located in Oak Creek, Wisconsin. Built in the 1950s, the station is owned by Wisconsin Energy and has the capacity of 1400 MW. The Oak Creek Power Station has been identified as a damage case by EPA because 12 offsite private wells found exceedances of molybdenum and boron. As reported in August, 2009, Wisconsin Energy had been supplying bottled water to the residents in the area without assuming responsibility for the contamination. The Oak Creek Power Station is due to be shut down by 2025. You can find the industry-reported data here. For more information on the Oak Creek Power Station, see EIP’s 2019 National Coal Ash Report.

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
9 / 18
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. molybdenum
Pollutants monitored and below guidelines
antimony arsenic barium beryllium boron cadmium chromium cobalt fluoride lead lithium mercury radium selenium sulfate 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 Friday, October 14, 2022 04:40:10 PM EDT