What is stormwater runoff?

Stormwater runoff is the water that flows off roofs, driveways, parking lots, streets, and other hard surfaces during rain storms. Rather than being absorbed into the ground, it pours into ditches, culverts, catch basins, and storm sewers. It does not receive any treatment before eventually entering the community’s streams and lakes.

Show All Answers

1. What is stormwater runoff?
2. What problems does it cause?
3. Why are the storm water and sewer systems separate?
4. What is nonpoint source pollution?
5. What is impervious surface area?
6. How did the city determine impervious surface area?
7. What can I do to reduce pollution in stormwater runoff?