Thomas Hill Energy Center

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Thomas Hill Energy Center has 6 groundwater monitoring wells, 4 of which have been polluted above federal advisory levels based on samples collected between August 21, 2016 and August 26, 2019. Groundwater at this site contains unsafe levels of sulfate, lithium, cobalt and arsenic.

Site description

Associated Energy Cooperative’s Thomas Hill Energy Center is in Clifton Hill, Missouri adjacent to the 1.5-billion-gallon Thomas Hill Reservoir in Randolph County. Thomas Hill has been in operation since 1966 and currently operates three coal-fired units that generate a combined capacity of 1,153-MW. Thomas Hill Energy Center is one of the few plants in the country that burns “clean coal,” a refined form of coal known for releasing more NOx emissions than coal’s unrefined form. Thomas Hill operates an onsite Ash Pond System that is regulated under the CCR rule.

You can find the industry-reported data here. For more information about the Thomas Hill Energy Center, see EIP's 2019 National Coal Ash Report.

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
4 / 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 cobalt lithium sulfate
Pollutants monitored and below guidelines
antimony barium beryllium boron cadmium chromium fluoride lead mercury molybdenum 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 Monday, October 24, 2022 05:51:28 PM EDT