Independence Steam Station

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Independence Steam Station has 10 groundwater monitoring wells, 3 of which have been polluted above federal advisory levels based on samples collected between May 26, 2010 and October 28, 2015. Groundwater at this site contains unsafe levels of manganese, boron, selenium and sulfate.

Site description

Entergy's Independence Steam Station is located in Newark, Arkansas, about four miles from the confluence of the Black and White Rivers. Coal ash waste from the plant is disposed of in a landfill. According to Entergy's Revised 2012 Sampling and Analysis Plan, groundwater beneath the landfill generally flows east-southeast toward the Black River, but the flow direction beneath the landfill shifts from northeasterly to southeasterly due to local influences on groundwater levels. The plant also operates two wastewater recycle ponds and one surge pond.

Independence Steam Station is listed among the U.S. Environmental Protection Agency's potential damage cases, indicating that activities at the site have potentially contributed to groundwater contamination. For more information about Independence Steam Station, see EIP's 2010 report, In Harm's Way.

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
3 / 10
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 manganese selenium sulfate
Pollutants monitored and below guidelines
antimony arsenic barium cadmium chromium mercury molybdenum strontium thallium
Pollutants not monitored
ammonia, beryllium, cobalt, copper, cyanide, fluoride, gross alpha particle, gross beta particle, hexavalent chromium, lead, lithium, nickel, nitrate, nitrite, radium, silver, tritium, uranium

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