What is considered impervious surface area (ISA)?
Any area composed of any material that impedes or prevents natural infiltration of water into the soil. Impervious surface area shall include but is not limited to:
-Concrete or asphalt streets
-Crushed stone and gravel surfaces
-Parking areas
-Tennis courts

Please call 336-883-3111 for more information.

Show All Answers

1. What is stormwater runoff?
2. What is the City’s policy on stormwater runoff?
3. How do I determine if I'm eligible for City assistance with drainage problems on private property?
4. What is an NPDES Permit?
5. What is an ERU and how is my stormwater fee calculated?
6. What is considered impervious surface area (ISA)?
7. Is the stormwater fee a tax?
8. Is the City charging residents for rain?
9. How can I reduce my stormwater fee?
10. What if a customer disagrees with the amount of ISA that was measured on their property?