The U.S. Census Bureau offers SIC/NAICS correspondence tables
EPA website page for overview of the Stormwater Program
EPA website page discussing stormwater discharges from industrial facilities
Washington State Department of Ecology SWPPP Guidance Manual
Know Your Watershed by the Watershed Information Network
Clean Water Education Partnership – What Can I Do: On the Job?
Water Resources Clip Art Collection from the University of Wisconsin-Extension
A Guide To Watersheds
