Proposed Rules and Regulations

The Wyoming Department of Environmental Quality – Air Quality Division will hold a public hearing on April 25, 2017 at 9:00 a.m., in the Tech Room Basement, of the Department of Environmental Quality – Sheridan Office, 2100 West 5th Street, Sheridan, WY 82801.  The Air Quality Division (Division) is soliciting public comment on the State of Wyoming’s Request for Redesignation and Limited Maintenance Plan for the Attainment in the Particulate Matter (PM10) Moderate Nonattainment Area in the City of Sheridan, in Sheridan County, Wyoming.  A previous public hearing regarding the Request for Redesignation was held at the December 8, 2016 Air Quality Advisory Board meeting; revisions based on public comment received at that hearing were incorporated into the document.  Upon review and completion of a finalized draft, the Request for Redesignation will be submitted to the Environmental Protection Agency (EPA).  Once approved, the Request for Redesignation will involve a revision to the State of Wyoming’s State Implementation Plan.

The updated Request for Redesignation document can be accessed from the file downloader below under the filename "Sheridan Redesignation: Public Comment Draft (3.23.2017) (PDF)."

The Wyoming Air Quality Advisory Board (Board) will meet on March 28th, 2017 at 9:00 a.m., at the University of Wyoming BP Collaboration Center, 1020 East Lewis Street, Laramie, Wyoming, 82071.  The Air Quality Division (Division) is requesting the Board’s presence so that the Division may provide the Board with updates on current AQD activities and topics pertaining to air regulation that may affect Wyoming.  There are no rulemaking activities on the agenda for this meeting. Members of the public interested in attending the meeting are welcome and may participate in any discussions that take place.  Copies of the agenda, public notice are available for public inspection at the Department of Environmental Quality, Air Quality Division, 200 West 17th Street, Cheyenne, Wyoming, 82002.  Electronic copies will be available after March 1st, 2017, at  

If you have questions regarding the meeting, or to request a hard copy of any of the materials, please contact Amber Potts at 307-777-2489.

In accordance with the Americans with Disabilities Act, special assistance or alternative formats will be made available upon request for individuals with disabilities.


Wyoming Department of Environmental Quality has updated sections of the Wyoming Air Quality Standards and Regulations (WAQSR):  Chapters 2, 3, 4, 5, 6, 7, 8, and 11 have been revised through the statutory rulemaking process, and changes became state-effective on December 20, 2016.  Please discard existing contents of Chapter 2, Chapter 3, Chapter 4, Chapter 5, Chapter 6, Chapter 7, Chapter 8, and Chapter 11 and then insert the new editions of the chapters, which can be accessed electronically at

A more detailed explanation of the revisions can be accessed by clicking the files below.


File Date