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 Announcement (WAC 173-445) 04/30/20

This is a rulemaking announcement (CR-101) for WAC 173-445, Greenhouse Gas Assessment for Projects.

https://ecology.wa.gov/rulemaking-announcement-wac-173-445-04-30-20

Rulemaking Announcement (WAC 173-446B) 5-25-23

This is a rulemaking announcement (CR-101) for WAC 173-446B, Climate Commitment Act Funds Reporting.

https://ecology.wa.gov/rulemaking-announcement-wac-173-446b-5-11-23

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

Rulemaking Announcement (WAC 173-446A) 08/04/21

This is a rulemaking announcement (CR-101) for Chapter 173-446A WAC, Criteria for Emissions-Intensive, Trade-Exposed Industries.

https://ecology.wa.gov/rulemaking-announcement-wac-173-446a-08-04-21

Rulemaking Announcement (WAC 173-442; WAC 173-441) 09/21/15

This is a rulemaking announcement for WAC 173-442 Clean Air Rule; WAC 173-441 Reporting of Emissions of Greenhouse Gases.

https://ecology.wa.gov/rulemaking-announcement-wac-173-442;-wac-173-441

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

This is a rulemaking proposal (CR-102) for Chapter 173-446A WAC, Criteria for Emissions-Intensive, Trade-Exposed Industries.

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

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

Rulemaking proposal (WAC 173-442; WAC 173-441) 05/31/16

This is a rulemaking proposal (CR-102) for WAC 173-442 Clean Air Rule; WAC 173-441 Reporting of Emissions of Greenhouse Gases

https://ecology.wa.gov/rulemaking-announcement-wac-173-442;-wac-173-1

Rulemaking Proposal (WAC 173-422 and WAC 173-441) 01/05/16

This is a rulemaking proposal (CR-102) for WAC 173-422 and WAC 173-441.

https://ecology.wa.gov/rulemaking-proposal-wac-173-422-and-wac-173-441

Rulemaking proposal language for (WAC 173-441) 05/18/16

This is proposed rule language for WAC 173-441, Reporting of Emissions of Greenhouse Gases

https://ecology.wa.gov/rulemaking-proposal-language-for-wac-173-442;-wac

Rulemaking proposal language for (WAC 173-442) 05/18/16

This is proposed rule language for WAC 173-442 Clean Air Rule.

https://ecology.wa.gov/rulemaking-proposal-language-for-wac-173-442;-1

Rulemaking proposal language for (WAC 173-442)

This is proposed rule language for WAC 173-442.

https://ecology.wa.gov/rulemaking-proposal-language-for-wac-173-442-05

Rulemaking proposed language (WAC 173-441) 05/31/16

This is proposed rule language for WAC 173-441.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-441-05-31-1

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

Rulemaking Announcement (WAC 173-446) 08/04/21

This is a rulemaking announcement (CR-101) for Chapter 173-446 WAC, Climate Commitment Act Program.

https://ecology.wa.gov/rulemaking-announcement-wac-173-446-08-04-21

Rulemaking Announcement (WAC 173-443; WAC 173-455) 08/16/21

This is a rulemaking announcement (CR-101) for WAC 173-443, Hydrofluorocarbons (HFCs); WAC 173-455, Air Quality Fee Rule.

https://ecology.wa.gov/rulemaking-announcement-wac-173-443-wac-173-455

Rulemaking Proposal (WAC 173-443; WAC 173-455) 7-13-23

This is a rulemaking proposal (CR-102) for Chapter 173-443 WAC, Hydrofluorocarbons (HFCs) and Chapter 173-455 WAC, Air Quality Fee Rule.

https://ecology.wa.gov/rulemaking-proposal-wac-173-443;-wac-173-455-7-13-23

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

Rulemaking Proposal (WAC 173-443; WAC 173-455) 8-31-23

This is a rulemaking continuance (CR-102) for Chapter 173-443 WAC, Hydrofluorocarbons (HFCs) and Chapter 173-455 WAC, Air Quality Fee Rule.

https://ecology.wa.gov/rulemaking-proposal-wac-173-443;-wac-173-455-8-31-23