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.
Publication: Hydrofluorocarbons Adopted Rule Language – Informational Guidebook
This guidebook is supplemental and is intended to provide general information to stakeholders about the Chapter 173-443 WAC Hydrofluorocarbons (HFCs) and Other Fluorinated Greenhouse Gases rule language and how it may affect them.
https://ecology.wa.gov/publication-hydrofluorocarbons-adopted-rule-language-informational-guidebook
Online tool: Air quality monitoring network
Map-based tool providing near real-time air quality information to protect health. It's used to determine if air quality meets health-based federal standards.
https://ecology.wa.gov/air-quality-monitoring-network
Chapter 173-446B WAC – Climate Commitment Act Funds Reporting
This is the rulemaking page for Chapter 173-446B WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-446b
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 173-444 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 173-445 WAC – Greenhouse Gas Assessment for Projects
This is the rulemaking page for Chapter 173-443 WAC, Greenhouse Gas Assessment for Projects.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-445
Chapter 173-446 WAC – Cap-and-Invest Offsets
This is the rulemaking page for Chapter 173-446 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-446-offsets
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 173-446A 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
Chapter 173-446 WAC – Allowance Price Containment Reserve
This is the rulemaking page for Chapter 173-446 WAC, Allowance Price Containment Reserve.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-446-apcr
Chapter 173-441 and 173-446 WAC, Cap-and-Invest Linkage
This is the rulemaking page for Chapters 173-441 and 173-446.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-441-446-linkage
WAC 173-166 Emergency drought relief
This is the rulemaking page for Chapter 173-166 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-166
Clean energy coordination
We provide information on how clean energy projects are sited, reviewed, and permitted.
https://ecology.wa.gov/regulations-permits/sepa/clean-energy
Millennium Bulk Terminals Longview
Millennium proposed a coal export terminal at the former Reynolds smelter in Cowlitz County.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-at-ecology/millennium
Contanda expansion proposal
Contanda, formerly Westway Terminal, proposed an expansion of the Grays Harbor methanol terminal.
https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-at-ecology/grays-harbor-terminal-expansion/contanda
Chapters 173-441 and 173-446 WAC – Electricity Markets
This is the rulemaking page for Chapter 173-441 WAC and Chapter 173-446 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-441-446
Chapters 173-400 and 173-401 WAC, General Regulations for Air Pollution Sources
This is the rulemaking page for Chapters 173-400 and 173-401 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-400-401-air-pollution-sources
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
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