Chapter 173-445 WAC

Ecology is starting rulemaking as directed by the governor. The purpose of this rulemaking is to create a new rule, Chapter 173-445 WAC, Greenhouse Gas Assessment for Projects. This rulemaking will: 

  • Address analysis and mitigation of greenhouse gas emissions for environmental assessments of industrial and fossil fuel projects.
  • Provide consistent and comprehensive assessment methods for industrial and fossil fuel projects.
  • Provide clarity and transparency to industry, the public, and agencies.

Rulemaking timeline


Announcement phase (CR-101)

Filing date:
April 30, 2020

Announcement documents

Rule development phase

April 30, 2020 – Spring 2021

Additional languages

Español (Spanish) 中文 (Chinese) Tiếng Việt (Vietnamese) 한국어 (Korean)


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.