Four Corners Power Plant

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Four Corners Power Plant has 42 groundwater monitoring wells, 42 of which have been polluted above federal advisory levels based on samples collected between November 04, 2015 and December 03, 2019. Groundwater at this site contains unsafe levels of sulfate, lithium, boron, cobalt, selenium, fluoride, molybdenum, radium, arsenic, lead, thallium, beryllium, cadmium and chromium.

Site description

Arizona Public Service Company’s Four Corners Generating Station is in San Juan County, NM, on the banks of the man-made Morgan Lake. Plant Four Corners began operations in 1963 and now operates two of five coal-fired units that combine to produce 1636-MW. After several years of lawsuits concerning both air and groundwater pollution, Plant Four Corners retired the oldest three of the coal-fired units in 2013. The Four Corners Generating Station is planning to fully retire all coal-fired units by 2031. Four Corners Generating Station operates their Multiunit 1 landfill, URS pond and CWT Pond, which are all regulated under the CCR-rule. Four Corners Generating Station is among the U.S. Environmental Protection Agency's list of potential damage cases, indicating that coal ash disposal at the site has potentially polluted groundwater or surface water at levels which threaten human health and the environment.

You can find the industry-reported data here. For more information about the Four Corners Power Plant, see EIP's 2019 National Coal Ash Report.

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
42 / 42
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 beryllium boron cadmium chromium cobalt fluoride lead lithium molybdenum radium selenium sulfate thallium
Pollutants monitored and below guidelines
antimony barium mercury
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, October 24, 2022 05:54:25 PM EDT