What is considered an impervious surface?
An impervious surface is one that, because of the surface’s composition or compacted nature, impedes or prevents natural infiltration of water into the soil. This includes roofs, solid decks, driveways, patios, sidewalks (other than public walks located in the City’s right-of-way), parking areas, tennis courts, concrete, asphalt, or crusher/run streets or paths, and compacted gravel or dirt surfaces, as determined by the Department of Public Works.

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1. Why is impervious surface area used to determine a property's stormwater user fee?
2. What is considered an impervious surface?
3. What is not considered an impervious surface?
4. How is the amount of impervious surface area on my property calculated?
5. What if I disagree with the amount of impervious area listed on my bill?