NPDES & Stormwater Permit Overview:
https://azdeq.gov/permits
Construction General Permit (CGP):
https://azdeq.gov/AZPDES/CGP
Industrial General Permit (IGP):
https://www.azdeq.gov/MSGP_Industrial/Non-Mining
Municipal Separate Storm Sewer System (MS4) General Permit:
http://www.azdeq.gov/MS4_GP