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.

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Greenhouse Gas Assessment for Projects (GAP) Rulemaking November 2020 Presentation

Public webinar presentation given 11-17-20

https://ecology.wa.gov/11-17-20-presentation

Greenhouse Gas Assessment for Projects (GAP) Rulemaking November 2020 Meeting Summary

Meeting summary for 11-17-20 public rulemaking webinar

https://ecology.wa.gov/11-17-20-meeting-summary

2012 Instream Flow Recommendations for the Spokane River (WAC 173-557; 173-555) 01/27/15

2012 Instream Flow Recommendations for the Spokane River - Hal Beecher, WDFW Instream Flow Biologist May 31, 2012 WAC 173-557; 173-555 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer and amendment to WAC 173-555-010.

https://ecology.wa.gov/2012-instream-flow-recommendations-for-the-spokane

2021 Brownfield Redevelopment Trust Fund Account report

A legislative report in response to requirements of Washington's environmental cleanup law, the Model Toxics Control Act.

https://ecology.wa.gov/2021-brownfield-redevelopment-trust-fund-account-legislative-report

Noise pollution

Learn more about how to manage noise pollution.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/noise-pollution

Chapter 173-339 WAC – Cosmetic Products Restrictions (Lead in Cosmetics)

This is the rulemaking page for Chapter 137-339 WAC (Lead in Cosmetics).

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-339-lead-in-cosmetics

Chapter 173-339 WAC – Cosmetic Products Restrictions (Formaldehyde in Cosmetics)

This is the rulemaking page for Chapter 173-339 WAC – Cosmetic Products Restrictions

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-339

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/rulemaking/wac-173-224

Chapter 173-448 WAC – Air Quality in Overburdened Communities

This is the rulemaking page for Chapter 173-448 WAC, Air Quality in Overburdened Communities.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-448

Chapter 173-423 WAC – Clean Vehicles Program

This is the rulemaking page for Chapter 173-423 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-423

Chapter 173-443 WAC Hydrofluorocarbons

This is the rulemaking page for Chapter 173-443 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-443-hydrofluorocarbons

Chapters 173-425, 173-430, and 173-400 WAC, Flame Cap Kilns and Air Curtain Incinerators

This is the rulemaking page for Chapters 173-425, 173-430, and 173-400 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-425-430-400

Chapter 173-337 WAC: Safer Products Restrictions and Reporting (Cycle 1.5: PFAS)

This is the rulemaking page for Chapter 173-337 WAC

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-337-nov2023

Chapter 173-167 WAC, Emergency Drought Funding (2025)

On June 5, 2025, Ecology adopted amendments to Chapter 173-167 WAC, Emergency Drought Funding (2025)

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-167-2025

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 173-507, 173-508, 173-513,173-514 and 173-515 WAC – Watershed Restoration Plan Rulemaking

This is the rulemaking page for Chapters 173-507, 173-508, 173-513, 173-514 and 173-515 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-507-508-513-514-515-watershed-restoration

Chapter 173-217 WAC – State Waters Alteration Permit

This is the rulemaking page for Chapter 173-217 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-217

Chapter 173-424 WAC – Clean Fuels Program

This is the rulemaking page for Chapter 173-424 WAC – Clean Fuels Program

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-424

Chapter 173-26 and 173-27 WAC, Shoreline Management Act

This is the rulemaking page for Chapter 173-26 WAC, Chapter 173-27 WAC

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-26-27-shoreline-management-act

Chapter 173-441 & 173-446 WAC, Cap-and-Invest Program Updates and 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-cap-and-invest-program-updates-and-linkage