Apache Station

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Apache Station has 8 groundwater monitoring wells, 1 of which have been polluted above federal advisory levels based on samples collected between April 13, 2016 and October 12, 2017. Groundwater at this site contains unsafe levels of lithium.

Site description

Apache Station is a 408 MW facility located in Sulphur Springs Valley in Arizona. The station is owned and operated by the Arizona Electric Power Cooperative. Its two coal units became operational in 1979. One of the coal units will be switched to gas in 2018 to comply with EPA's regional haze regulations. Apache Station handles coal ash in four different ash ponds, a coal pile retention basin, a cooling tower blowdown pond, an evaporation pond, a low volume wastewater pond, and two scrubber ponds. Seven of its coal ash surface impoundments are on the EPA's 2009 list of high hazard potential sites. Nine of the ponds are lined.

For more information on Coal Ash in Arizona, visit Earthjustice's Fact sheet, Coal Ash in Arizona.

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
1 / 8
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One or more exeedances
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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. lithium
Pollutants monitored and below guidelines
antimony arsenic barium beryllium boron cadmium chromium cobalt fluoride lead mercury molybdenum radium selenium sulfate 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 Monday, September 17, 2018 10:08:37 AM EDT