Allen Steam Station

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Allen Steam Station has 13 groundwater monitoring wells, 4 of which have been polluted above federal advisory levels based on samples collected between March 01, 2011 and March 02, 2015. Groundwater at this site contains unsafe levels of nickel and manganese.

Site description

Duke Energy's Allen Steam Plant opened in 1957 and is located on the banks of the Catawba River in Gaston County, North Carolina. It has five coal-fired generating units that are capable of producing 1,140 megawatts (MW) of electricity. The Environmental Protection Agency (EPA) classified the active ash pond onsite as having a significant-hazard dam.

In its 2007 Damage Case Assessment, the EPA found that there were documented exceedances of non-health based standards for manganese and iron in wells downstream from the facility based on historic data. In August 2013, the State of North Carolina entered into a consent decree regarding seeps and other un-permitted discharges to groundwater. Concerned that the State would not require Duke Energy to implement any meaningful remedies, the Catawba Riverkeeper sought (and was granted) the opportunity to intervene in the ongoing case.

For more information regarding Allen Steam Plant, visit

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
4 / 13
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. manganese nickel
Pollutants monitored and below guidelines
antimony arsenic barium boron cadmium chromium copper lead mercury nitrate selenium sulfate thallium
Pollutants not monitored
ammonia, beryllium, cobalt, cyanide, fluoride, gross alpha particle, gross beta particle, hexavalent chromium, lithium, molybdenum, nitrite, radium, silver, strontium, tritium, uranium

Facility last updated on Tuesday, February 26, 2019 04:13:48 PM EST