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Comment Period

Landfill Methane Emissions Rule

Proposed rulemaking

March 30, 2023 - June 30, 2023, 11:59 p.m.

Ecology proposes to update Chapter 173-408 WAC, Landfill Methane Emissions.

Comment on draft rule language to help us write the proposed rules. An informal public comment period occurs during rulemaking before we propose a rule (file the CR-102 form). During an informal public comment period, we use comments to help us write the proposed rules. We will hold a formal public comment period in Fall 2023 when we propose the rule.

This rulemaking may consider requirements about:

  • Reporting
  • Monitoring
  • Technology installation and performance
  • Penalties


We write rules to implement and enforce state and federal environmental laws and rules. Ecology follows a three-phase process for rulemaking:

  1. Announcement and development
  2. Proposal
  3. Adoption

For each phase of the process, we update the rulemaking web page and notify interested parties. We also file notice in the Washington State Register. To learn more about Ecology’s rulemaking process, read the Frequently Asked Questions.

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Comment online

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Comment by mail

Bill Flagg
Washington Department of Ecology
Air Quality Program
P.O. Box 47600
Olympia, WA 98504-7600
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Bill Flagg
Rulemaking Lead

To request ADA accommodation, contact Ecology's ADA Coordinator by email at ecyadacoordinator@ecy.wa.gov, or call 360-407-6831, 711 (relay service), or 877-833-6341 (TTY). More about our accessibility services.