Big Sioux Aquifer

The Big Sioux River under Watertown's stone bridge on Kemp Avenue in winter (J.T. Fey/For South Dakota Searchlight)

Ongoing study shows Big Sioux River mixing with aquifer that Watertown uses for water

BY: - February 20, 2023

The waters of the Big Sioux River are infiltrating the drinking water pulled from wells near Watertown, causing potentially harmful effects that aren’t fully understood yet. Those early conclusions come from a joint state and U.S. Geological Survey study on interactions between the river and the Big Sioux Aquifer. The study does not offer conclusions […]