Sherburne County (Sherco) Generating Station

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Snapshot

Sherburne County (Sherco) Generating Station has 31 groundwater monitoring wells, 17 of which have been polluted above federal advisory levels based on samples collected between May 03, 2010 and October 29, 2014. Groundwater at this site contains unsafe levels of nitrate, sulfate, molybdenum, antimony, arsenic, cadmium and lead.

Site description

Sherburne County (Sherco) Generating Station is a 2,222 MW coal-fired power plant located along the Mississippi River, about 45 miles northwest of the Twin Cities. The facility began operation in 1976 and is now made of 3 units. Sherco disposes of coal ash waste in 4 primary ash ponds and a landfill.

Sherco 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.

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
17 / 31
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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. antimony arsenic cadmium lead molybdenum nitrate sulfate
Pollutants monitored and below guidelines
ammonia barium boron chromium copper manganese mercury selenium
Pollutants not monitored
beryllium, cobalt, cyanide, fluoride, gross alpha particle, gross beta particle, hexavalent chromium, lithium, nickel, nitrite, radium, silver, strontium, thallium, tritium, uranium

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