Yes. Many of the more than 1,300 sites that have been listed on the National Priorities List include a groundwater contamination plume. Two examples in Minnesota are the New Brighton/Arden Hills Superfund Site (also known as the Twin Cities Army Ammunition Plant or TCAAP Site) and the Baytown Groundwater Contamination site.
The TCAAP Site plume extends under several cities, including New Brighton, Arden Hills, Columbia Heights, St. Anthony and Minneapolis.
The Baytown Groundwater Contamination plume is approximately five miles long, covers about seven square miles, and extends from the eastern portion of the City of Lake Elmo through Baytown Township, West Lakeland Township and the City of Bayport to the St. Croix River.