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.
Chapter 173-187 WAC
This is the rulemaking page for 173-187 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-187
Chapter 173-201A WAC (Chelan UAA)
This is the rulemaking page for Chapter 173-201A WAC (Chelan UAA)
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac173-201a-chelan-uaa
Chapter 173-201A WAC (Outstanding Resource Waters)
This is the rulemaking page for Chapter 173-201A WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-201a-outstanding-resource-waters
Chapter 173-201A WAC (Salmon Spawning Habitat)
This is the rulemaking page for Chapter 173-201A WAC for salmon spawning habitat.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac173-201a-salmon-spawning-habitat
Chapter 173-224 WAC-Water Quality Permit Fees
This is the rulemaking page for chapter 173-224 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-224
Chapter 173-337 WAC – Safer Products Restrictions and Reporting
This is the rulemaking page for Chapter 173-337 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-337-may2023
Chapter 173-340 WAC
This is the rulemaking page for Chapter 173-340 WAC, Model Toxics Control Act Cleanup Regulations.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-340
Chapter 173-408 WAC – Landfill Methane Emissions
This is the rulemaking page for Chapter 173-408 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-408
Chapter 173-423 WAC<br>and WAC 173-400-025 – Low Emission Vehicles
This is the rulemaking page for Chapter 173-423 WAC and Chapter 173-400 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-423-400
Chapters 173-423 and 173-400 WAC – Clean Vehicles Program
This is the rulemaking page for Chapter 173-423 WAC and Chapter 173-400 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac173-423-400jan18
Chapters 173-424 and 173-455 WAC – Clean Fuels Program
This is the rulemaking page for Chapters 173-424 and 173-455 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-424-455
Chapter 173-441 WAC – Reporting of Emissions of Greenhouse Gases
This is the rulemaking page for Chapter 173-441 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-441
Chapters 173-422 and 173-422A WAC – Motor Vehicle Emission Inspection
This is the rulemaking page to repeal Chapters 173-422 and 173-422A WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-422-422a
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 173-446 WAC – Climate Commitment Act Program Rule
This is the rulemaking page for Chapter 173-446 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-446
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 173-446A WAC
This is the rulemaking page for Chapter 173-446A WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-446a
Chapters 173-491, 173-400, 173-455 WAC – Emission Standards and Controls for Sources Emitting Gasoline Vapors
This rulemaking was withdrawn August 19, 2021 regarding WAC 173-491, WAC 173-400 and WAC 173-455.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-491-jul13
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