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 proposed language (WAC 173-423) 11/07/18

This is the proposed rule language for WAC 173-423, Low Emission Vehicles.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-423-11-07-1

Rulemaking proposed language (WAC 173-430) 12/04/18

This is the proposed rule language for WAC 173-430, Agricultural Burning.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-423-12-04-1

Rulemaking proposed language (WAC 173-423) 06/22/21

This is the proposed rule language for Chapter 173-423 WAC, Low Emission Vehicles.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-423-06-22-2

Rulemaking proposed language (WAC 173-441) 10/06/21

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

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-441-10-06-21

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 proposed language (WAC 173-423) 09-07-22

This is proposed rule language for Chapter 173-423 WAC, Clean Vehicles Program.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-423-09-07-22

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

Rulemaking proposed language (WAC 173-410) 11/07/18

This is the proposed rule language for WAC 173-410, Sulfite Pulping Mills.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-410-11-07-1

Rulemaking proposed language (WAC 173-444) 09/02/20

This is the proposed rule language for Chapter 173-444 WAC, Clean Energy Transformation Rule.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-444-09-02-2

Rulemaking proposed language (WAC 173-415) 11/07/18

This is the proposed rule language for WAC 173-415, Primary Aluminum Plants.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-415-11-07-1

Rulemaking proposed language (WAC 173-446) 5-16-22

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

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-446-5-16-22

Rulemaking proposed language (WAC 173-443) 06/16/20

This is the proposed rule language for Chapter 173-443 WAC, Hydrofluorocarbons.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-443-06-16-2

Rulemaking proposed language (WAC 173-424) 07-18-22

This is proposed rule language for Chapter 173-424 WAC, Clean Fuels Program Rule.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-424-07-18-22

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 173-446) 9-7-23

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

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-446-9-7-23

Rulemaking proposed language (WAC 173-408) 10-30-23

This is proposed rule language for Chapter 173-408 WAC, Landfill Methane Emissions.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-408-10-30-23

Rulemaking proposed language (WAC 173-446B) 4-23-24

This is the proposed rule language for Chapter 173-446B WAC, Climate Commitment Act Funds Reporting.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-446b-4-23-24

Proposed rule language

Proposed rule language for WAC 173-441, 446

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-441;-wac-173-446-6-27-24

Proposed rule language

Proposed rule language for WAC 173-441, 446

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-441;-wac-173-446-6-27-24-65f70fc3954d2f9fd8d9cf3e4a73c727

Rulemaking Proposed language (WAC 173-446) 2-12-25

Proposed rule language for WAC 173-446

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-446-2-12-25