Joliet Generating Station No. 29

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Joliet Generating Station No. 29 has 11 groundwater monitoring wells, 7 of which have been polluted above federal advisory levels based on samples collected between December 06, 2010 and November 07, 2019. Groundwater at this site contains unsafe levels of cobalt, manganese, sulfate, antimony, nickel, cadmium and lead.

Site description

Midwest Generation's Joliet 29 is a 1,320-MW capacity power facility in Joliet, Illinois in Will County, first built in 1965 along the Des Plaines River with two coal-fired units. Both units were converted to run on natural gas in 2016. The land surrounding the plant is primarily industrial or undeveloped, and according to Midwest Generation's Hydrogologic Assessment Repirt, industrial sites are located upgradient from some of the monitoring wells. Three active ash ponds are operated on the site and occupy 10 acres, regulated under the CCR rule. Two ponds have synthetic liners and the third is lined with a geo-composite material on the bottom. Seventeen potable and industrial use wells are located within 2,500 feet of the ash ponds (as of 2009), two of which are designated downgradient of the ash ponds. Both wells are owned by Midwest Generation and extend below a layer of soil that prevents water from entering the lower aquifer.

You can find the industry-reported data here. For more information about Joilet 29, see EIP's 2019 National Coal Ash Report.

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
7 / 11
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. antimony cadmium cobalt lead manganese nickel sulfate
Pollutants monitored and below guidelines
arsenic barium beryllium boron chromium copper fluoride lithium mercury molybdenum radium selenium silver thallium
Pollutants not monitored
ammonia, cyanide, gross alpha particle, gross beta particle, hexavalent chromium, nitrate, nitrite, strontium, tritium, uranium

Facility last updated on Friday, October 14, 2022 01:56:14 PM EDT