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Industrial Sites and Stormwater

General Permits No. 1 & 3

General Permit No. 1 is for stormwater discharge associated with industrial activity from businesses primarily engaged in manufacturing, trucking and transportation, construction and mining. General Permit No. 3 is for stormwater discharge associated with industrial activity from asphalt plants, concrete batch plants, rock crushing plants, and construction sand and gravel facilities. Industrial activity is regulated as part of the National Pollutant Discharge Elimination System (NPDES) administered by the EPA.

Summary guidance and the permit language for both General Permit No. 1 and No. 3 can be found here.

Industrial Stormwater Guidance

The National Academies of Science, Engineering, and Medicine has produced a handy guide for industrial stormwater permitting and builds upon a 2009 National Research Council publication by adding information regarding monitoring and management. The PDF can be downloaded here.