Storm Water Permitting

This program contains documents, forms, and other information pertaining to the WYPDES Storm Water Permitting. 

Please visit these links below relating to stormwater permitting:

For additional guidance, interactive maps, and other storm water related information, please go to the resources section located on the left of this page.

Storm Water Program News (Last updated 3/13/18)

*****  The new Industrial General Permit has been issued effective 3/1/18.  All existing authorizations are temporarily covered under the new permit.   Please watch for a renewal mailing within the next couple of weeks.  (3/13/18)

*****  The comment period for the draft Mineral Mining General Permit  has closed.  Staff are reviewing comments.  The new permit will be issued in the near future. In the meantime, the general permit has been administratively continued and will remain so until the new permit is issued.   Once the new permit is issued, a mailing with complete information on renewing coverage will be sent to all active permittees.  If there have been recent storm water personnel or mailing address changes, please contact the storm water staff with updated information.  To view the draft permit, the online public notice may be found here.  Please contact the storm water staff with any questions.  (7/19/17)

*****  New Notices of Intent (NOIs) for construction, mineral mining, and industrial storm water dischargers have been posted online today.  The new NOIs have newly required language regarding agency access to permitted facilities.  Please review the new language carefully before submitting NOIs to this office.  Older versions of NOIs will no longer be accepted and NOIs that do not meet the newest access requirements will be returned to the applicant.  Please contact storm water staff with any questions.  (3/30/17)

******  Please note that the Cheyenne Office of the DEQ Water Quality Division has moved to a new building.  The new address is below.  All NOIs, NOTAs, NOTs, and other reports should be sent to the address below.  Forms will be updated to reflect the new mailing address as soon as possible.  The WYPDES and storm water permitting staff are located on the 4th floor of the new building (the old 'JC Penney's Building' at 17th and Capitol).  The WYPDES compliance staff are located on the 3rd floor.  Other Water Quality programs will be located on other floors. Please call the program you're interested in to find out where they are (5/17/16):  

Wyoming Department of Environmental Quality/Water Quality Division
Storm Water Program

200 West 17th Street - 4th Floor
Cheyenne, WY  82002

Active Storm Water Authorizations (Excel files)

Authorizations Under the Large Construction General Permit (5 or more acres) – updated bimonthly (last updated 10/31/17)

Authorizations Under the Industrial General Permit – updated quarterly (last updated 9/30/17)

Authorizations Under the Mineral Mining General Permit – updated quarterly (last updated 9/30/17)

Authorizations Under the Municipal Separate Storm Sewer System (MS4) General Permit – updated as needed (last updated 12/30/09)