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 5/8/2020)

******  WYPDES permit fees will rise on July 1, 2020.  Fees for storm water permits will change from $100 per each 12-months to $200 per each 12-months.  After the fee change, the maximum fee will be $1000 for a five year term.  All WYPDES permits are affected whether storm water or discharge permits. (May 8, 2020)

******  The maximum permit fee for the Mineral Mining General Permit (MMGP) is $300 until July 1, 2020.  On July 1st the maximum fee will rise to $600 until March 31, 2021.  (May 8, 2020)

******  The Large Construction General Permit (LCGP) and the Small Construction General Permit (SCGP) have been administratively continued.  Those projects with active coverage on 1/31/2020 continue to be covered until the new permits are issued.  At that time there will be a renewal mailing to all LCGP permittees of record.  This "mailing" will likely be by email, though details are still being worked out.  There will not be a renewal mailing for the SCGP.  Updating the project SWPPP and relevant permittee will be the reponsibility of the SCGP permittee.  The Storm Water Program will also be sending updates periodically by email. 
******  NOIs for new construction projects should be submitted as usual.  The permit fee currently stands at $100 for the remainder of the current permit (early summer 2020).  (May 8, 2020)

******  Draft permits will be in the May 15 WYPDES public notice.  The renewal process may begin as early as early July.  Contact program staff with any questions or concerns.  To be added to an email notification list specific to this renewal, please email your contact information to Barb Sahl ( or Anita Rehner (  (May 8, 2020)

******   In response to the COVID-19 pandemic and with some staff teleworking, the Water Quality Division is requesting that the public submit documents (applications and other forms) via an upload link whenever possible.  Please see more information about what can be uploaded here:  (April 2, 2020)

******   PLEASE NOTE.  In view of the current Coronavirus outbreak, the WDEQ Storm Water Program (and staff for most WDEQ programs) is currently working remotely.  Please plan to work with staff via telephone or email or video call (such as Google Hangouts).  Emails and telephone numbers remain the same.  Thank you for your understanding.  We are working at full capacity and are happy to help in any way we can.  (March 25, 2020)

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)

Under the Large Construction General Permit (5 or more acres) – updated bimonthly (last updated 5/14/20)

Under the Industrial General Permit – updated quarterly (last updated 5/14/20)

Under the Mineral Mining General Permit – updated quarterly (last updated 5/14/20)

Under the Municipal Separate Storm Sewer System (MS4) General Permit – updated as needed (last updated 12/30/2019)

Program Resources

File Date