Public Event: May 5, 2025, 2:30 p.m., in Online webinar
Ecology is hosting a community forum for the Cap-and-Invest Program Updates and Linkage rulemaking.

Public Event: May 28, 2025, 5:30 p.m., in Online webinar
An online public hearing to accept oral comments will be held on May 28, 2025 at 5:30 p.m.

Public Event: May 15, 2025, 10 a.m., in Online webinar

This is the rulemaking page for Chapter 173-201A WAC.

This is a rulemaking page for Chapter 173-201A WAC for variances in Spokane River.

This is the rulemaking page for Chapter 173-158 WAC.

This is the rulemaking page for Chapters 173-425, 173-430, and 173-400 WAC.

This is the rulemaking page for Chapter 173-224 WAC

This is the rulemaking page for Chapter 173-339 WAC – Cosmetic Products Restrictions

Chapter 173-350 WAC - Organics Management

This is the rulemaking page for Chapter 173-337 WAC

This is the rulemaking page for Chapters 173-424 and 173-455 WAC.

This is the rulemaking page for Chapter 173-444 WAC, Clean Energy Transformation Rule.

This is the rulemaking page for Chapter 173-443 WAC, Greenhouse Gas Assessment for Projects.

Public Event: June 11, 2025, 9 a.m., in Lacey, WA and Online webinar
The Washington Natural Resource Damage Assessment (RDA) Committee meets monthly to determine the most appropriate method for assessing environmental injury from oil spills into state waters.

Public Event: July 9, 2025, 9 a.m., in Lacey, WA and Online webinar
The Washington Natural Resource Damage Assessment (RDA) Committee meets monthly to determine the most appropriate method for assessing environmental injury from oil spills into state waters.

Public Event: Aug. 13, 2025, 9 a.m., in Lacey, WA and Online webinar
The Washington Natural Resource Damage Assessment (RDA) Committee meets monthly to determine the most appropriate method for assessing environmental injury from oil spills into state waters.

Public Event: Sept. 10, 2025, 9 a.m., in Lacey, WA and Online webinar
The Washington Natural Resource Damage Assessment (RDA) Committee meets monthly to determine the most appropriate method for assessing environmental injury from oil spills into state waters.

Public Event: Oct. 8, 2025, 9 a.m., in Lacey, WA and Online webinar
The Washington Natural Resource Damage Assessment (RDA) Committee meets monthly to determine the most appropriate method for assessing environmental injury from oil spills into state waters.

Public Event: Nov. 12, 2025, 9 a.m., in Lacey, WA and Online webinar
The Washington Natural Resource Damage Assessment (RDA) Committee meets monthly to determine the most appropriate method for assessing environmental injury from oil spills into state waters.

Public Event: Dec. 10, 2025, 9 a.m., in Lacey, WA and Online webinar
The Washington Natural Resource Damage Assessment (RDA) Committee meets monthly to determine the most appropriate method for assessing environmental injury from oil spills into state waters.

This is the rulemaking page for Chapter 173-446 WAC.

Comment Period: May 1, 2025, 8 a.m. - June 2, 2025, 11:59 p.m.
This site was previously cleaned up from 2007–2012. The site is re-entering the cleanup process after West Bay Development Group (West Bay) found more contamination in 2021.

Public Event: May 20, 2025, 11:30 a.m., in Yakima, WA
Join community leaders and brownfield professionals at this two-day conference. Get strategies for redeveloping vacant or underutilized properties that may be contaminated, and learn how to turn them into gems like affordable housing, retail, and parks.

Public Event: May 21, 2025, 7:30 a.m., in Yakima, WA
Join community leaders and brownfield professionals at this two-day conference. Get strategies for redeveloping vacant or underutilized properties that may be contaminated, and learn how to turn them into gems like affordable housing, retail, and parks.