Marathon St. Paul Park Refinery - Oil Refinery in St. Paul Park, Minnesota

Marathon St. Paul Park Refinery is an operational oil refinery situated in St. Paul Park, Washington County, Minnesota. The facility is part of Marathon Petroleum Corporation's refining network and serves the Midwestern United States with refined petroleum products. The refinery operates under the regulatory framework of the U.S. Environmental Protection Agency (EPA), including the Clean Air Act Refinery MACT standards and other federal and state environmental regulations. As a refinery in the inland region, it is not subject to offshore drilling regulations but must comply with spill prevention and control measures under the Clean Water Act. The St. Paul Park Refinery plays a significant role in the regional fuel supply, producing gasoline, diesel, and other refined products. Its location along the Mississippi River provides access to crude oil deliveries via pipeline and barge, supporting its operational capacity and downstream market reach.

The refinery is situated near the Mississippi River, which poses potential risks for water contamination in the event of spills. The facility's refining complexity, measured by the Nelson complexity index, influences its environmental footprint. As an inland refinery, it is subject to EPA regulations on air emissions and wastewater discharge, with a focus on reducing volatile organic compounds and sulfur dioxide.