State by State Resource Center
http://cfpub.epa.gov/npdes/linkresult.cfm?program_id=6&link_category=2&view=link
U.S. Environmental Protection Agency
National Pollutant Discharge Elimination System (NPDES)
http://cfpub.epa.gov/npdes/stormwater/swppp.cfm
National Latitude and Longitude Locator:
http://www.topozone.com/viewmaps.asp
Authorization Status for EPA's Stormwater
Industrial and Construction Programs
http://cfpub.epa.gov/npdes/stormwater/authorizationstatus.cfm
National Pollutant Discharge Elimination System
Compliance Inspection Manual from the EPA
http://www.epa.gov/compliance/resources/publications/monitoring/cwa/inspections/npdesinspect/npdesmanual.html