Merom Generating Station

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Merom Generating Station has 37 groundwater monitoring wells, 24 of which have been polluted above federal advisory levels based on samples collected between May 26, 2010 and November 20, 2019. Groundwater at this site contains unsafe levels of lithium, cadmium, sulfate, boron, manganese, chromium, fluoride, cobalt, arsenic, lead, beryllium and barium.

Site description

Merom Generating Station is a coal-fired plant located near Sullivan, Indiana and the Wabash River, previously owned by Hoosier Energy. Open since 1982, the station operates two generating units with a total capacity of about 1,000-MW. The facility had been slated for retirement in 2023 until it was sold to Hallador Energy Company in 2022. Hallador Energy still intends to retire the facility eventually but has yet to declare a date. The plant sits on the banks of an unnamed lake. There are three coal ash landfills at the station: Inactive Area 1, Active Area 2, and Area 3. The landfills were designed with either natural cohesive soil barriers or a compacted clay liner. Area 1 and Area 2 landfills were not equipped with a leachate collection system. Area 3 was planned for closure in October, 2016. The Merom Generating Station CCR Landfill is among EPA’s list of potential damage cases – indicating it has polluted groundwater or surface water at levels which threaten human health and the environment.

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

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
24 / 37
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 barium beryllium boron cadmium chromium cobalt fluoride lead lithium manganese sulfate
Pollutants monitored and below guidelines
antimony mercury molybdenum selenium silver thallium
Pollutants not monitored
ammonia, copper, cyanide, gross alpha particle, gross beta particle, hexavalent chromium, nickel, nitrate, nitrite, radium, strontium, tritium, uranium

Facility last updated on Monday, October 17, 2022 10:15:19 AM EDT