Sherburne County (Sherco) Generating Station

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Sherburne County (Sherco) Generating Station has 57 groundwater monitoring wells, 21 of which have been polluted above federal advisory levels based on samples collected between May 03, 2010 and October 30, 2019. Groundwater at this site contains unsafe levels of nitrate, sulfate, arsenic, cobalt, selenium, lead, molybdenum, antimony and cadmium.

Site description

Sherco Generating Station Xcel Energy Company’s Sherburne County (Sherco) Generating Station is a 2,469-MW coal-fired power plant located along the Mississippi River, about 45 miles northwest of the Twin Cities in Becker, Minnesota. The facility began operations in 1976 and consists of three units. Units I and II are scheduled to be retired in 2026 and 2023 respectively, building a natural gas power plant on the site, while Unit III is scheduled for retirement in 2030. Sherco disposes of coal in its Bottom Ash Pond, Sherco Scrubber Solids Pond 3 and Sherco 3 Landfill. All three disposal units are regulated under the CCR rule.

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.

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

Monitoring Wells Wells reporting one or more exceedances for at least one pollutant.
21 / 57
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. antimony arsenic cadmium cobalt lead molybdenum nitrate selenium sulfate
Pollutants monitored and below guidelines
ammonia barium beryllium boron chromium copper fluoride lithium manganese mercury radium thallium
Pollutants not monitored
cyanide, gross alpha particle, gross beta particle, hexavalent chromium, nickel, nitrite, silver, strontium, tritium, uranium

Facility last updated on Wednesday, October 19, 2022 02:43:58 PM EDT