Collection of a discrete water-quality sample at the Grand Calumet Lagoon

On July 13, 2022, USGS scientists collected water quality samples at 3 sites in support of a study on eutrophication in the Grand Calumet River Area of Concern. The site pictured here is 413704087153501 Grand Calumet Lagoon at Marquette Park at Gary, IN, which was the background site for the study. Samples were collected for nutrients and isotopes.