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
Public comments: Public Notice of Draft Permit for Tacoma Central Wastewater Treatment Plant
We invite your comments on the draft NPDES permit for the Tacoma Central Wastewater Treatment Plant- WA0037087.
https://ecology.wa.gov/public-comments-public-notice-of-draft-permit-for-tacoma-central-wastewater-treatment-plant
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
Online tool: Cleanup and Tank Search
Find information on contamination cleanup sites and underground storage tanks.
https://ecology.wa.gov/online-tool-cleanup-and-tank-search
Chapter 173-135 WAC: Pasco Basin Groundwater Subarea
This is the rulemaking page for Chapter 173-135 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-135
Chapter 173-201A WAC (Aquatic Life Toxics Criteria)
This is the rulemaking page for Chapter 173-201A WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-201a-aquatic-life-toxics-criteria
Chapter 173-201A WAC (Variances)
This is a rulemaking page for Chapter 173-201A WAC for variances in Spokane River.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac173-201a-variances
Chapter 173-305 WAC
This is the rulemaking page for Chapter 173-305 WAC
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-305
Chapter 173-331 WAC
This is the rulemaking page for Chapter 173-331 WAC, Vehicle Battery Recycling.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-331-dec15
Chapter 173-333 WAC
This is the rulemaking page for Chapter 173-333 WAC, Chemical Action Plans.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-333-oct15
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
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 173-446B 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 173-503A WAC
This is the rulemaking page for Chapter 173-503A WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-503a-feb15
Chapter 173-525 WAC
This is the rulemaking page for Chapter 173-525 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-525-mar05
Chapter 173-526 WAC
This is the rulemaking page for Chapter 173-526 WAC.
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-526-mar05
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
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
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
WAC 173-337 – Safer Products Restrictions and Reporting
This is the rulemaking page for Chapter 173-337 WAC
https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-337-nov2023
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