What is impervious surface area?

Any surface that does not readily absorb water and impedes the natural infiltration of water into the soil. Common examples include:

  • Concrete or Asphalt Streets
  • Crushed Stone
  • Decks
  • Driveways
  • Gravel Surfaces
  • Parking Areas
  • Patios
  • Roofs
  • Sidewalks
  • Tennis Courts

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?