An impervious surface is a hard surface that does not allow rain to absorb into the ground. Impervious surfaces increase stormwater runoff. Some examples are roofs, parking lots, driveways, and sidewalks.

An impervious surface is a hard surface that does not allow rain to absorb into the ground. Impervious surfaces increase stormwater runoff. Some examples are roofs, parking lots, driveways, and sidewalks.
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