Stormwater runoff is rainwater or snowmelt that flows over surfaces like streets, parking lots, lawns, and roofs instead of soaking into the ground. This runoff picks up pollutants like oil, chemicals, dirt, and debris, which can then enter local water bodies. Communities use stormwater controls — known as best management practices (BMPs) — to reduce and prevent this pollution at its source.
Stormwater runoff matters because it can carry pollutants into local water bodies, affecting both our environment and our health.