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Environmental Protection Agency - Stormwater
Stormwater runoff is generated from rain and snowmelt events that flow over land or impervious surfaces, such as paved streets, parking lots, and building rooftops, and does not soak into the ground. The runoff picks up pollutants like trash, chemicals, oils, and dirt/sediment that can harm our rivers, streams, lakes, and coastal waters.

North Carolina Department of Environmental Quality
Learn how to implement stormwater control measures to treat or limit pollutants and other damaging effects of stormwater runoff.

Iredell County - Erosion Control Section
All grading work performed in Iredell County including the City of Statesville, Town of Mooresville, and the Town of Troutman requires a permit.  Please refer to the chart below to help determine which permit is necessary. 

UNC-Charlotte Stormwater 101
When precipitation accumulates more quickly than it can be soaked up by the ground, some of the excess water flows over the ground surface. This is stormwater runoff. In urban areas, people have built many impervious surfaces like roads, parking lots, and buildings which prevent stormwater from soaking into the ground. This increases the amount of stormwater runoff during rainfall events in populated areas.