Gibson Generating Station

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Gibson Generating Station has 114 groundwater monitoring wells, 108 of which have been polluted above federal advisory levels based on samples collected between May 06, 2010 and May 17, 2019. Groundwater at this site contains unsafe levels of boron, arsenic, molybdenum, manganese, sulfate, lithium, cobalt, selenium, lead, nitrate, barium, beryllium, nickel, chromium, mercury and thallium.

Site description

Gibson Generating Station, which began operating in 1976, is located along the Wabash River, southeast of Mount Carmel, Illinois. It is a 5 unit, 3,145-MW coal fired power plant and Duke Energy’s largest plant. Unit 5 is co-owned by Wabash Valley Power Association and Indiana Municipal Power Agency. The station is comprised of four CCR units: East Ash Pond Settling Basin, North Ash Basin System, South Settling Basin, and South Landfill.

The lake is part of a designated wildlife area and was formerly used by the public for fishing until it was closed due to high levels of selenium by the Indiana Department of Environmental Management. Drinking water contamination from boron and manganese were documented in private residential wells in 2007 and 2008 and led Duke Energy to supply bottled water to residents of Mt. Carmel, whose water had been polluted above drinking water standards and health advisories. On-site wells have shown contamination with high levels of arsenic, selenium, boron, manganese, and iron. The Gibson Generating Station 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 about the Gibson Generating Station, see EIP's 2019 National Coal Ash Report.

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
108 / 114
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 chromium cobalt lead lithium manganese mercury molybdenum nickel nitrate selenium sulfate thallium
Pollutants monitored and below guidelines
ammonia antimony cadmium copper cyanide fluoride radium silver
Pollutants not monitored
gross alpha particle, gross beta particle, hexavalent chromium, nitrite, strontium, tritium, uranium

Facility last updated on Friday, October 14, 2022 05:34:44 PM EDT