Regulations & Permits

Use this portal to filter and search for all of our regulatory information.

We oversee many state and federal laws designed to protect Washington's land, air, and water. See our laws, rules, & rulemaking page for more information about our current rules and rulemaking.

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Rulemaking withdrawal Notice (WAC 173-491) 8/19/2021

This is a rulemaking withdrawal notice for WAC 173-491 WAC Emissions standards and controls for sources emitting gasoline vapors

https://ecology.wa.gov/rulemaking-withdrawal-wac-173-491-08-19-2021

Greenhouse Gas Assessment for Projects (GAP) Rulemaking October 2020 Meeting Summary

Meeting summary for 10-29-20 public rulemaking webinar

https://ecology.wa.gov/10-29-20-meeting-summary

Rulemaking proposed language (WAC 173-446A) 12/22/21

This is the proposed rule language for Chapter 173-446A WAC, Criteria for Emissions-Intensive, Trade-Exposed Industries.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-446a-12-22-21

Secondary economic impacts analysis (REMI) (WAC 173-442; WAC 173-441) 09/15/16

This is the secondary economic impacts analysis (REMI) for WAC 173-442 and WAC 173-441.

https://ecology.wa.gov/secondary-economic-impacts-analysis-remi-wac-17

SEPA checklist, including a staff report - non-project review form (WAC 173-442; WAC 173-441) 01/05/

This is the SEPA checklist for WAC 173-442 Clean Air Rule and WAC 173-441Reporting of Emissions of Greenhouse Gases rulemaking.

https://ecology.wa.gov/sepa-checklist-including-a-staff-report-non-p-1

SEPA checklist, including a staff report - non-project review form

This is the SEPA checklist for WAC 173-442 Clean Air Rule and WAC 173-441Reporting of Emissions of Greenhouse Gases rulemaking.

https://ecology.wa.gov/sepa-checklist-including-a-staff-report-non-pro

SEPA determination of non-significance (WAC 173-442; WAC 173-441) 01/05/16

This is the SEPA determination of non-significance for WAC 173-442 and WAC 173-441

https://ecology.wa.gov/sepa-determination-of-non-significance-wac-173-44

SEPA determination of non-significance 05/31/16

This is the SEPA determination of non-significance for WAC 173-442 Clean Air Rule and WAC 173-441. Reporting of Emissions of Greenhouse Gases rulemaking.

https://ecology.wa.gov/sepa-determination-of-non-significance-05-31-16

SEPA determination of non-significance and addendum (WAC 173-442; WAC 173-441) 09/15/16

This is the SEPA determination of non-significance and addendum for WAC 173-442 and WAC 173-441

https://ecology.wa.gov/sepa-determination-of-non-significance-and-addendu

Unofficial rule language - readable format (WAC 173-442) 05/31/16

This is Unofficial rule language - readable format for WAC 173-442.

https://ecology.wa.gov/unofficial-rule-language-readable-format-wac-17

Table of Contents (WAC 173-446) 5-16-22

This is the table of contents for proposed rule language for Chapter 173-446 WAC, Climate Commitment Act Program.

https://ecology.wa.gov/table-of-contents-wac-173-446-5-16-22

Comments from the July 12, 2016, public hearing (written) (WAC 173-442; WAC 173-441) 7/12/16

Written comments from the July 12, 2016, public hearing.

https://ecology.wa.gov/written-comments-from-the-july-12-2016-public-hea

Written comments from the July 14, 2016, public hearing in Olympia (WAC 173-442; WAC 173-441)

Written comments from the July 14, 2016, public hearing.

https://ecology.wa.gov/written-comments-from-the-july-14-2016-public-hea

Rulemaking proposed language (WAC 173-443) 7-13-23

This is proposed rule language for Chapter 173-443 WAC, Hydrofluorocarbons (HFCs).

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-443-7-13-23

Rulemaking proposed language (WAC 173-455) 7-13-23

This is proposed rule language for Chapter 173-455 WAC, Air Quality Fee Rule.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-455-7-13-23

Chapter 173-442 WAC – Clean Air Rule

This is the rulemaking page to repeal Chapter 173-442 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-442

Chapters 173-443 and 173-455 WAC – Hydrofluorocarbons (HFCs)

This is the rulemaking page for Chapters 173-443 and 173-455 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-443-455

Chapter 173-443 WAC – Hydrofluorocarbons (HFCs)

On Dec. 10, 2020, Ecology adopted a new rule, Chapter 173-443 WAC, Hydrofluorocarbons.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac173-443

Chapter 173-444 WAC – Clean Energy Transformation Rule

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

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-444

Chapter 173-446B WAC – Climate Commitment Act Funds Reporting

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

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-446b