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1200 Series Construction Stormwater Permits - General Use

Stormwater runoff from land and impervious areas such as paved streets, parking lots, and building rooftops during rainfall and snow events often contain pollutants that could adversely affect water quality. National Pollutant Discharge Elimination System permits are required for stormwater discharges to surface waters from construction and industrial activities and municipalities if stormwater from rain or snow melt leaves your site through a "point source" and reaches surface waters either directly or through storm drainage.  A point source is a natural or human-made conveyance of water through such things as pipes, culverts, ditches, catch basins, or any other type of channel.

1200-C renewal 2025

DEQ proposes to renew the draft 1200-C permit which regulates discharges from construction activities to surfaces waters of the state. The current 1200-C construction general permit expires Dec. 14, 2025. This permit renewal is a replacement of the previous 1200-C construction stormwater general permit issued on Dec. 15, 2020.

Comment period closed on Oct. 27, 2025 at 5 PM.

Supporting Documents:



Your DEQ Online for stormwater permits

​DEQ Stormwater Permitting is now operating in DEQ's newest online platform, called Your DEQ Online. Please refer to the fact sheets, instructional guides, video tutorials and webinars below for more information on how to create a new account. The DEQ Stormwater permitting program is no longer accepting paper applications or reports, all stormwater permitting transactions must be conducted through a Your DEQ Online account.

Access Your DEQ Online  
Submit a Help Request to Your DEQ Online Help Desk​

Your DEQ Online – Stormwater Instructional Guides

​Webinars: Submit DMRs and other Industrial and Construction Stormwater Reports in YDO.

These live instruction webinars were recorded, and include instructions for how to submit revised ESCPs, revised SWPCPs, DMRs and other reports.

Contact

For more information,visit our contacts page for the local DEQ office or agent.

For information on 1200-CN and CA permits, visit 1200-C Series Construction Stormwater Permits for Government Agencies.

Technical assistance