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 Proposal (WAC 173-423) 11/07/18

This is a rulemaking proposal (CR-102 form) for WAC 173-423, Low Emission Vehicles.

https://ecology.wa.gov/rulemaking-proposal-wac-173-423-11-07-18

Rulemaking Proposal (WAC 173-423; WAC 173-400) 06/22/21

This is a rulemaking proposal (CR-102) for Chapter 173-423 WAC, Low Emission Vehicles; Chapter 173-400 WAC, General Regulations for Air Pollution Sources.

https://ecology.wa.gov/rulemaking-proposal-wac-173-423;-wac-173-400-06

Rulemaking Proposal (WAC 173-430) 12/04/18

This is a rulemaking proposal (CR-102 form) for WAC 173-430, Agricultural Burning.

https://ecology.wa.gov/rulemaking-proposal-wac-173-430-12-04-18

Rulemaking Proposal (WAC 173-441) 10/06/21

This is a rulemaking proposal (CR-102) for Chapter 173-441 WAC, Reporting of Emissions of Greenhouse Gases.

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

Rulemaking Proposal (WAC 173-407) 10/04/17

This is a rulemaking proposal (CR-102) for WAC 173-407 Carbon Dioxide Mitigation Program, Greenhouse Gases Emissions Performance Standard and Sequestration Plans and Programs for Thermal Electric Generating Facilities

https://ecology.wa.gov/rulemaking-proposal-wac-173-407-20171004

Rulemaking Proposal (WAC 173-455) 09-07-22

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

https://ecology.wa.gov/rulemaking-proposal-wac-173-455-09-07-22

Rulemaking Proposal (WAC 173-423; WAC 173-400) 9-7-22

This is a rulemaking proposal (CR-102) for Chapter 173-423 WAC, Clean Vehicles Program; Chapter 173-400 WAC, General Regulations for Air Pollution Sources.

https://ecology.wa.gov/rulemaking-proposal-wac-173-423;-wac-173-400-9-7-2

Rulemaking Proposal (WAC 173-405; WAC 173-410; WAC 173-415) 11/07/18

This is a rulemaking proposal (CR-102 form) for WAC 173-405, Kraft Pulping Mills; WAC 173-410, Sulfite Pulping Mills; WAC 173-415, Primary Aluminum Plants.

https://ecology.wa.gov/rulemaking-proposal-wac-173-405;-wac-173-410;-wac

Rulemaking Emergency Adoption Notice (WAC 173-443) 10/20/20

This is the fifth emergency rulemaking adoption notice (CR-103E) for WAC 173-443, Hydrofluorocarbons (HFCs).

https://ecology.wa.gov/rulemaking-emergency-adoption-notice-wac-173-4

Rulemaking Proposal (WAC 173-444) 09/02/20

This is a rulemaking proposal (CR-102) for Chapter 173-444 WAC, Chapter 173-444 WAC, Clean Energy Transformation Rule.

https://ecology.wa.gov/rulemaking-proposal-wac-173-444-09-02-20

Rulemaking Emergency Adoption Notice (WAC 173-443) 11/21/19

This is the second emergency rulemaking adoption (CR-103E) for WAC 173-443, Hydrofluorocarbons (HFCs).

https://ecology.wa.gov/rulemaking-emergency-adoption-notice-wac-173-1

Rulemaking Emergency Adoption Notice (WAC 173-443) 07/30/19

This is the first emergency rulemaking adoption (CR-103E) for WAC 173-443, Hydrofluorocarbons (HFCs).

https://ecology.wa.gov/rulemaking-emergency-adoption-notice-wac-173-443

Rulemaking Proposal (WAC 173-443) 06/16/20

This is a rulemaking proposal (CR-102) for Chapter 173-443 WAC, Hydrofluorocarbons.

https://ecology.wa.gov/rulemaking-proposal-wac-173-443-06-16-20

Rulemaking Proposal (WAC 173-400;401)02/05/18

This is the proposed rulemaking form (CR 102 form)

https://ecology.wa.gov/rulemaking-proposal-wac-173-400;-wac-173-401-02

Rulemaking Proposal (WAC 173-455; WAC 173-400) 06/20/18

This is a rulemaking proposal (CR-102 form) for WAC 173-455, Air Quality Fee Rule; WAC 173-400, General Regulations for Air Pollution Sources.

https://ecology.wa.gov/rulemaking-proposal-wac-173-455;-wac-173-400-06

Rulemaking proposed language (WAC 173-400) 06/20/18

This is the proposed rule language for WAC 173-400, General Regulations for Air Pollution Sources.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-400-06-20-1

Rulemaking Proposal (WAC 173-460) 06/04/19

This is a rulemaking proposal (CR-102) for Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/rulemaking-proposal-wac-173-460-06-04-19

Rulemaking Proposal (WAC 173-424; WAC 173-455) 07-18-22

This is a rulemaking proposal (CR-102) for Chapter 173-424 WAC, Clean Fuels Program Rule; Chapter 173-455 WAC, Air Quality Fee Rule.

https://ecology.wa.gov/rulemaking-proposal-wac-173-424;-wac-173-455-07-18

Rulemaking Proposal (WAC 173-408) 10-30-23

This is a rulemaking proposal (CR-102) for Chapter 173-408 WAC, Landfill Methane Emissions.

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

Rulemaking Proposal (WAC 173-400; WAC 173-401) 9-18-24

This is a rulemaking proposal (CR-102) for Chapter 173-400 WAC, General Regulations for Air Pollution Sources and Chapter 173-401 WAC, Operating Permit Regulation.

https://ecology.wa.gov/rulemaking-proposal-wac-173-400;-wac-173-401-9-18-24