Regulations & Permits

Use this portal to filter and search for all of our regulatory information.

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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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Regulations & Permits

Use this portal to filter and search for all of our regulatory information.

Regulations & Permits icon

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.

See more about this collection...
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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