Coronado Generating Station

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Coronado Generating Station has 13 groundwater monitoring wells, 13 of which have been polluted above federal advisory levels based on samples collected between January 04, 2016 and March 04, 2020. Groundwater at this site contains unsafe levels of lithium, sulfate, radium, arsenic, fluoride, cobalt and boron.

Site description

Salt River Project’s (SRP) Coronado Generating Station opened in 1979 and is located near Saint Johns, Arizona in Apache County. It has two coal-fired generating units with a combined capacity of 773-MW. The plant operates one CCR unit, regulated under the CCR rule, called the Ash Disposal Landfill.

You can find the industry-reported data here. For more information on the Coronado Generating Station, see EIP’s 2019 National Coal Ash Report.

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
13 / 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. arsenic boron cobalt fluoride lithium radium sulfate
Pollutants monitored and below guidelines
antimony barium beryllium cadmium chromium lead mercury molybdenum selenium 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 Thursday, October 13, 2022 10:51:56 AM EDT