Rainwater can carry extra sand and salt into Duluth’s sewers, which filters, untreated into Lake Superior. Photo credit: Becky Mortensen
streams1-300×199
Great Lakes Echo - Environmental news of the Great Lakes region
Great Lakes Echo (https://greatlakesecho.org/2012/10/05/runoff-water-harmful-to-duluths-trout-streams/streams1-300x199/)