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The Department of Environmental Quality has revised Water Quality Rules, Chapter 4, Regulations for Releases of Oil and Hazardous Substances into Waters of the State of Wyoming.
The revisions to Chapter 4 (1) clarify existing requirements; (2) update references; (3) remove passages that are restatements of the Wyoming Statutes; and (4) correct grammar and punctuation errors throughout the Chapter.
The Environmental Quality Council adopted the revised rules at a public hearing held on November 18, 2025, via Zoom. The final rule was filed with the Wyoming Secretary of State on January 12, 2026.
Electronic copies of the rule are available from the Secretary of State at rules.wyo.gov, under “Current,” “Rules,” “Environmental Quality, Dept of (020),” “Water Quality,” and “Chapter 4.”
If you have any questions concerning this rule adoption, please contact Gina Thompson at 307-777-7343 or gina.thompson@wyo.gov.
Para español, visite deq.wyoming.gov. Americans with Disabilities Act: special assistance or alternative formats will be made available upon request for individuals with disabilities. Please provide at least fourteen (14) days before the close of the public comment period for such requests.
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