What is an impervious surface area?

An impervious surface area is any surface that does not readily absorb water and blocks the natural infiltration of water into the soil.  Common examples of this include roofs, driveways, parking areas, sidewalks, patios, decks, tennis courts, concrete or asphalt streets, crushed stone, and gravel surfaces.

Show All Answers

1. What is stormwater runoff?
2. What is polluted stormwater runoff?
3. Can leaves and grass go into the storm drain?
4. What causes stormwater pollution?
5. Why do we need to manage stormwater runoff?
6. How can I help prevent stormwater pollution?
7. What is an illicit discharge?
8. Doesn’t stormwater runoff go into the sanitary sewer?
9. What is an impervious surface area?
10. Are there any ways I can make a difference?
11. What should I do if I see or suspect an illicit discharge?
12. Whom do I contact if I have further questions?