Under the Federal Clean Water Act, the Town of Mooresville is required to have a National Pollutant Discharge Elimination System (NPDES) Permit. The Town has had this permit allowing the discharge of stormwater from the Town's MS4 within its corporate limits to the Town's receiving waters since December 1, 2011. In order to stay in compliance with this permit, the Town has a stormwater management plan which details a couple minimum measures used to reduce the discharge of pollutants and protect water quality.