Sioux Energy Center

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Sioux Energy Center has 29 groundwater monitoring wells, 15 of which have been polluted above federal advisory levels based on samples collected between March 16, 2016 and November 15, 2017. Groundwater at this site contains unsafe levels of molybdenum, boron, sulfate, lithium and cobalt.

Site description

Ameren Energy Company’s Sioux Energy Center is located in St. Charles County, MO along the banks of the Mississippi River. Sioux began operations in 1967 and has a generating capacity of 1,099 MW. Sioux has been scheduled to be converted to natural gas by 2033. Plant Sioux’s surface impoundments, SCPB, SCPC, SCPA and SCL4A, are all regulated under the CCR rule. You can find the industry-reported data here. For more information on Sioux Energy Center, see EIP’s 2019 National Coal Ash Report.

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
15 / 29
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. boron cobalt lithium molybdenum sulfate
Pollutants monitored and below guidelines
antimony arsenic barium beryllium cadmium chromium fluoride lead mercury 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 Wednesday, July 24, 2019 12:26:32 PM EDT