Hennepin Power Station has 39 groundwater monitoring wells, 26 of which have been polluted above federal advisory levels based on samples collected between March 16, 2010 and November 16, 2017. Groundwater at this site contains unsafe levels of molybdenum, boron, lithium, cobalt, nitrate, arsenic, cadmium, selenium, manganese and sulfate.Site description
Hennepin Power Station is a 306 MW facility owned and operated by Dynegy near Hennepin, Illinois. Hennepin reported the on-site release of 274,615 pounds of waste to the EPA's Toxic Release Inventory. Dynegy settled with the Department of Justice, Environmental Protection Agency, and the State of Illinois in 2005 after violating Clean Air Act permitting provisions. The settlement most notably included the installation of $500 million worth of pollution control equipment. Havana Power Station, Baldwin Power Station, Vermilion Power Station, and Wood River Station were also involved in this settlement.
For more information about plant coal ash impoundments, visit the Prairie Rivers Network's Coal Ash Map.