Runoff Is Major Cause Of Water Pollution

"Urban and rural runoff, also called non-point pollution because it doesn't originate at a specific point, is the leading cause of dirty water in Wisconsin, according to the state Department of Natural Resources. Runoff degrades or threatens about 40% of the state's 44,000 miles of streams and rivers, 90% of its 15,037 inland lakes, many Great Lakes harbors, wetland areas and substantial groundwater resources."