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Comment Period

Hydrofluorocarbons Rulemaking

Informal public comment period

Jan. 23, 2020 - March 17, 2020, 11:59 p.m.

Ecology is starting rulemaking for Chapter 173-443 WAC, Hydrofluorocarbons.

The purpose of this rulemaking is to establish requirements to move away from hydrofluorocarbons (HFCs). HFCs are powerful greenhouse gases that are made up of hydrogen, fluorine, and carbon.

Help us develop this new rule. Comment on draft rule language.


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

Linda Kildahl
Washington Department of Ecology
Air Quality Program
P.O. Box 47600
Olympia, WA 98504-7600
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Linda Kildahl
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.