Why is stormwater runoff polluted?
When rain hits the ground it does so with enough energy to dislodge tiny particles from barren soil and impervious surfaces. The stormwater runoff then carries pollutants found on the ground, such as sediments, nutrients, pathogens, pesticides, hydrocarbons, and metals into our catch basins, streams, and ultimately the Chesapeake Bay. Polluted stormwater runoff is widely recognized by scientists as the greatest threat to water quality.

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1. What is impervious cover?
2. How does impervious cover impact volume of stormwater runoff?
3. Why is stormwater runoff polluted?
4. What can I do to reduce my impact on stormwater runoff?
5. Where can I find more information about stormwater?