Grainger Generating Station

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Grainger Generating Station has 14 groundwater monitoring wells, 9 of which have been polluted above federal advisory levels based on samples collected between April 12, 2010 and April 10, 2014. Groundwater at this site contains unsafe levels of arsenic, manganese and sulfate.

Site description

Grainger Generating Station is a two unit, 164 MW coal-fired plant located near Conway, South Carolina, along the Waccamaw River. The facility began operating in the 1960s and stored coal combustion waste in two unlined ash ponds, one of which was converted into a dry ash storage area in 1977. Grainger was retired in 2012 and demolition of the plant is expected to be completed by the summer of 2016.

Grainger Generating Station is among the U.S. Environmental Protection Agency's list of potential damage cases, indicating that it has potentially polluted groundwater or surface water at levels which threaten human health and the environment. For more information regarding the Grainger Station, see EIP's 2010 report, Out of Control and visit

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
9 / 14
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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 manganese sulfate
Pollutants monitored and below guidelines
barium cadmium chromium copper fluoride lead nitrate selenium thallium uranium
Pollutants not monitored
ammonia, antimony, beryllium, boron, cobalt, cyanide, gross alpha particle, gross beta particle, hexavalent chromium, lithium, mercury, molybdenum, nickel, nitrite, radium, silver, strontium, tritium

Facility last updated on Thursday, March 23, 2017 03:30:54 PM EDT