Proposed Rules and Regulations

This is a notice of final adoption of revised Wyoming Department of Environmental Quality Rules of Practice and Procedure Chapters 1, 2, 3, 4, 5, 6, 7, and 9. Chapter was 4 repealed in its entirety and 6 was repealed and replaced with new Chapter 9. Chapters 1, 2, 3, 5, 7, and 9 were modified in order to adopt as much of the uniform contested case rules developed by Wyoming Office of Administrative Hearings as is consistent with the specific and distinct requirements of WDEQ and EQC and state or federal law governing or applicable to WDEQ and EQC, in accordance with W.S. 16-3-103(j). The rules were also modified in order to update and clarify requirements applicable to rulemaking, petitions for award of costs and expenses under W.S. 35-11-437(f), director review involving surface coal mining operations, hearings before the department, and very rare or uncommon areas.

The Environmental Quality Council adopted the modified rules at a public hearing at the Herschler Building, Room 1699, 122 W 25th St, Cheyenne, Wyoming on March 22, 2017. The final rule was filed with the Wyoming Secretary of State on April 24, 2017.

Copies of the Wyoming Department of Environmental Quality Rules of Practice and Procedure are available electronically on the Wyoming Secretary of State website at

If you have any questions concerning this rule adoption, please contact Gina Thompson at 307-777-7343 or at


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)."


File Date