Stormwater runoff occurs when precipitation from rain flows over the ground. Impervious surfaces like driveways, sidewalks, and streets prevent stormwater from naturally soaking into the ground.
Why is Runoff a Problem?
Stormwater can pick up debris, chemicals, dirt and pollutants that likely will flow into a storm sewer system or directly to the body of water. Anything that enters a storm sewer system is discharged, untreated, into the water bodies we use for swimming, fishing, and drinking water.