Most of the pollution that enters Grand Traverse Bay comes from countless small sources throughout the watershed. When it rains, stormwater picks up a variety of pollutants along the way and transports them to the nearest stream, river or lake. According to the USEPA, this non-point pollution accounts for 70-80% of water pollution problems in the United States.

Find out more from our Fact Sheet about Non-point Source Pollution and Stormwater.