National Polution Discharge Elimination System

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Stormwater RunoffStormwater pollution occurs when rainwater runoff flows across the surface of the land, picking up pollutants such as pesticides, metals and oil. The runoff then deposits these pollutants into streams, lakes and rivers. In an effort to prevent this, the Illinois Environmental Protection Agency (IEPA) has instituted the requirements of the National Pollution Discharge Elimination System (NPDES) Stormwater Management Program.

Any project that disturbs land over one acre in area is subject to the regulations of the NPDES program. A disturbance includes any grading, clearing, excavating, and other earth-moving activities associated with development. Prior to the beginning of these activities, the developer is required to get a permit from the IEPA.

In order to obtain an NPDES permit, the developer must provide a stormwater pollution prevention plan (SWPPP) and submit a Notice of Intent (NOI) to the IEPA. This plan must identify potential sources of pollution, and describe what measures will be taken to make sure that those pollutants are not transferred to water sources by stormwater. According to the regulations of the NPDES program, the City of Crystal Lake cannot issue any construction or grading permits until at least thirty days have elapsed since IEPA receipt of the NOI or upon issuance of an NPDES permit.

For more information, please visit the IEPA website on the NPDES Stormwater Management Program, or call the IEPA Office of Small Business at 1-888-EPA-1996.