Chapter 173-442 WAC – Clean Air Rule

We repealed Chapter 173-442 WAC, Clean Air Rule. The rule is no longer necessary because the functions have been preempted and replaced by the 2021 Climate Commitment Act. In Spring 2021, the Legislature passed the Climate Commitment Act, which explicitly provides authority to regulate transportation fuel providers. In addition, the Climate Commitment Act preempts the provisions of Chapter 173-442 WAC and directs Ecology to repeal the Clean Air Rule. Ecology is using the expedited rulemaking process to repeal the Clean Air Rule.

Rulemaking timeline


Rule adoption phase (CR-103)

Adoption date:
July 18, 2023

Rule effective date:
Aug. 18, 2023

Rule adoption documents:

Expedited phase (CR-105)

Filing date:
March 22, 2023

Rule proposal documents:

Deadline to submit an objection: May 22, 2023

Ecology’s expedited rulemaking process does not include:
  • a public hearing
  • small business economic impact statement
  • a regulatory analysis
  • responses to the criteria for a significant legislative rule

Send an objection to using the expedited rulemaking process for these rules to:
Katie Wolt, Agency Rules Coordinator
Washington Department of Ecology
Governmental Relations
P.O. Box 47600
Olympia, WA 98504-7600

Additional languages

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To request ADA accommodation for disabilities, or printed materials in a format for the visually impaired, contact Ecology's ADA Coordinator by email at, or call 360-407-6831. People with impaired hearing may call Washington Relay Service at 711. People with speech disability may call TTY at 877-833-6341.