What is an impervious surface?
An impervious surface does not allow water or other liquids to pass through it. Buildings, parking lots, sidewalks, etc. are examples of impervious surfaces because rainwater cannot be absorbed into them. In contrast, grassy or wooded areas are pervious. Impervious surfaces cause more runoff, which is why urban areas often have localized flooding issues during storms.

One acre that is fully wooded creates no runoff during a 1" rain event. However, one acre that is paved creates over 27,000 gallons of runoff during a 1" rain event.

Show All Answers

1. What is stormwater runoff?
2. How do I report an illicit discharge/stormwater issue?
3. What is an impervious surface?
4. Why is it important to manage stormwater runoff?
5. What is the Town's storm drainage policy?
6. What is the Town's Stormwater Utility?
7. How is this fee charged?
8. Why not pay for these activities through taxes?
9. What will I get in return for paying this fee?
10. Are there volunteer opportunities with the stormwater program?