Page last updated December 3, 2013.
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Revised Standards and Regulations
Chapters 3, 4, 5, 6, 8 and 11 of the Wyoming Air Quality Standards and Regulations (WAQSR) have been revised. These chapters became effective State rules on November 22, 2013. To view these revised chapters, click on "Standards and Regulations" under Air Quality Program Links. A memorandum describing the major changes to each chapter may be viewed here.