Why is impervious area used to determine a property's stormwater utility fee?

The amount of impervious surface on a property is the single most important factor affecting the amount of water flowing off a property, how quickly that water flows off a property, and the amount of pollution picked up by the water from that property. Because of this, basing stormwater utility fees on the impervious area on a property is one of the most common methods used to determine stormwater utility fees.

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1. What is stormwater?
2. What services do I get from paying stormwater utility fees?
3. Do you prefer monthly billing over annual?
4. I disagree with my billing tier or ERU calculation...
5. How can I find out if there is a limit on the amount of impervious surface on my lot?
6. Isn't this essentially a tax on rain water?
7. How long is my billing cycle?
8. Who is responsible for paying the stormwater utility fee?
9. Are churches and other tax-exempt properties exempt from stormwater utility fees?
10. My property is in the County, do I have to pay?
11. Why is impervious area used to determine a property's stormwater utility fee?
12. What is considered an impervious surface?
13. How is the amount of impervious area on my property calculated?
14. If stormwater causes so many problems, why don’t we treat it along with our sanitary sewage?