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 173-360A WAC
This is the rulemaking page for Chapter 173-360A WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-360a
WAC 173-50: Accreditation of Environmental Laboratories
This is the rulemaking page for Chapter 173-50 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-50
Chapter 173-167 WAC Emergency Drought Funding (2021)
This is the emergency rulemaking page for Chapter 173-167 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-167-2021
Chapter 173-185 WAC
This is the rulemaking page for chapter 173-185 WAC, Oil Movement by Rail and Pipeline Notification.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-185
Chapter 173-180 WAC and Chapter 173-184 WAC
This is the rulemaking page for Chapter 173-180 WAC and Chapter 173-184 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-180-173-184
Chapter 173-201A WAC (revisions)
On Dec. 30, 2019, Ecology adopted amendments to Chapter 173-201A WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac173-201a-revisions
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 173-219 WAC
On January 23, 2018 the Department of Ecology adopted new rule, Chapter 173-219 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-219-jun14
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 173-228 WAC
On April 9, 2018, Ecology adopted a new rule, Chapter 173-228 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-228-jul17
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 173-350 WAC
On August 01, 2018 the Department of
Ecology adopted amendments to Chapter 173-350 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-350-nov13
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
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