That area seems closest to the Northern Great Plains aquifer system, but not actually in it: https://pubs.usgs.gov/ha/ha730/ch_i/gif/I049.GIF https://pubs.usgs.

That area seems closest to the Northern Great Plains aquifer system, but not actually in it: https://pubs.usgs.gov/ha/ha730/ch_i/gif/I049.GIF https://pubs.usgs.gov/ha/ha730/ch_i/gif/I049.GIF And the area seems to be part of the Hudson Bay watershed: https://www.environment.fhwa.dot.gov/Pubs_resources_tools/resources/eei_awards/2011nd.aspx https://www.environment.fhwa.dot.gov/Pubs_resources_tools/re... So it doesn't seem that even the runoff would threaten any American aquifers.