What are impervious surfaces?

Impervious surfaces are mainly constructed areas (rooftops, sidewalks, roads, and parking lots) covered by impenetrable materials such as asphalt, concrete, brick, and stone. These materials seal surfaces, repel water, and prevent precipitation from infiltrating soils. Soils compacted by urban development are also highly impervious. Everyone contributes to impervious coverage. As communities develop, the amount of impervious coverage increases. These surfaces concentrate and increase the flow of storm water within a community or region. This increases the potential for flooding and is a major factor in the degradation of water quality.

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1. Will revenue from the drainage fee be used to stop flooding?
2. Should I verify my drainage fee rate block?
3. Can I request a review of my drainage fee rate block?
4. Is this a tax?
5. How was the amount of the fee decided?
6. Will paying this charge lower my water/wastewater bill?
7. Is Denton's runoff really a pollution concern?
8. What are impervious surfaces?
9. What is storm water pollution?