What is not considered an impervious surface?
Those areas that allow water to infiltrate naturally into the ground, such as forests, gardens, and areas covered with grass, are not counted as impervious surface areas.

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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?