Stormwater runoff is generated when rain, sleet and snowmelt flows over impervious surfaces such as paved streets, parking lots and driveways and then enters the storm sewers which discharge to local water bodies.

The runoff picks up and carries pollutants- such as trash, chemicals, pet waste, oil and grease, lawn fertilizer and pesticides, as it flows across pavement and down drains. These pollutants enter waterways where they harm fish and animals.

The United States Environmental Protection Agency (EPA) created the National Pollutant Discharge Elimination System (NPDES) Stormwater Program that is designed to reduce and stop pollutant discharge. The EPA is in charge of regulating policy on stormwater runoff and operates under the Clean Water Act. They have provided guidance and stormwat

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