Search Results - Washington State Department of Ecology

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 173-442 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

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 173-167 WAC, Emergency Drought Funding (2025)

Ecology adopted another Emergency Drought Funding Rule Aug. 7, 2025, under chapter 173-167 WAC.

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

Chapter 173-201A WAC (Natural Conditions)

This is the rulemaking page for Chapter 173-201A WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-201a-natural-conditions

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/closed-rulemaking/wac-173-446b

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 173-503A WAC

This is the rulemaking page for Chapter 173-503A WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-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/closed-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/closed-rulemaking/wac-173-526-mar05

Chapter 173-167 WAC Emergency Drought Funding (2023)

This is the rulemaking page for Chapter 173-167 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-167-2023

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/closed-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 173-350 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

WAC 173-55: Accreditation of Cannabis Laboratories

This is the rulemaking page for Chapter 173-55 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-55

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

Chapters 173-491, 173-400, 173-455 WAC – Emission Standards and Controls for Sources Emitting Gasoline Vapors

This rulemaking was withdrawn August 19, 2021 regarding WAC 173-491, WAC 173-400 and WAC 173-455.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-491-jul13

Chapter 197-11 WAC (SEPA rules – expedited rulemaking)

This is the Rulemaking page for Chapter 197-11 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-197-11-sepa-rules

Chapter 173-167 WAC Emergency Drought Funding (2024)

This is the rulemaking page for Chapter 173-167 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-167-2024-28119efcad412da8f533ebdc1470dba2

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

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

Chapter 173-158 WAC, Flood Plain Management

This is the rulemaking page for Chapter 173-158 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-158

Chapters 173-507, 173-508, 173-513, 173-514, and 173-515 WAC – Instream Resources Protection Program

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

Reserve Silica Reclamation

Public Event: May 7, 2025, 6 p.m., in Online webinar

https://ecology.wa.gov/events/swm/reserve-silica-reclamation-remedial-investigation/reserve-silica-reclamation-remedial-investigation-e7dbeb8ddeac653aa26cded6e007f707

Reserve Silica Reclamation

Comment Period: May 1, 2025, 12 a.m. - May 30, 2025, 11:59 p.m.
Reserve Silica Reclamation Remedial Investigation

https://ecology.wa.gov/events/swm/reserve-silica-reclamation-remedial-investigation/reserve-silica-reclamation-remedial-investigation

Public notice of construction permit

Comment Period: July 30, 2025, 12 a.m. - Sept. 10, 2025, 11:59 p.m.
Public notice of construction permit

https://ecology.wa.gov/events/swm/rockwool/public-notice-of-construction-permit

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 173-443 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

Monthly committee meeting

Public Event: Nov. 12, 2025, 9 a.m., in Lacey, WA and Online webinar
The Washington Natural Resource Damage Assessment (RDA) Committee meets monthly to determine the most appropriate method for assessing environmental injury from oil spills into state waters.

https://ecology.wa.gov/events/spills/natural-resource-damage-assessment-committee/november-2025

Monthly committee meeting

Public Event: Dec. 10, 2025, 9 a.m., in Lacey, WA and Online webinar
The Washington Natural Resource Damage Assessment (RDA) Committee meets monthly to determine the most appropriate method for assessing environmental injury from oil spills into state waters.

https://ecology.wa.gov/events/spills/natural-resource-damage-assessment-committee/december-2025

Cap-and-Invest: Comment on EITE allowance allocation

Comment Period: May 5, 2025, 1:31 p.m. - Sept. 3, 2025, 12:01 a.m.
Provide comment on Ecology’s report to the Legislature on how no-cost allowances are allocated to Emission-Intensive Trade-Exposed Industries (EITEs) from 2035-2050.

https://ecology.wa.gov/events/cpr/eite-report-to-leg/eite-leg-report

Specialty Minerals Longview

Comment Period: May 27, 2025, 12 a.m. - July 1, 2025, 11:59 p.m.
Specialty Minerals Longview

https://ecology.wa.gov/events/swm/specialty-minerals-longview/specialty-minerals-longview

Modernizing Washington's litter tax

Comment Period: July 8, 2025, 12 a.m. - Aug. 8, 2025, 11:59 p.m.
Litter tax agency request legislation

https://ecology.wa.gov/events/swm/litter-tax/litter-tax-agency-request-legislation

September Virtual Open House

Public Event: Sept. 16, 2025, 6 p.m., in online webinar
Join our Virtual Open House on September 16 from 6 p.m. - 7 p.m.

https://ecology.wa.gov/events/rulemaking/173-26-and-173-27-wac-shoreline-management-act/septembervirtualopenhouse

MTCA Cleanup Orders and Public Participation Plan

Comment Period: Aug. 5, 2025, 12:01 a.m. - Sept. 16, 2025, 11:59 p.m.
MTCA Cleanup Orders and Public Participation Plan

https://ecology.wa.gov/events/swm/cosmo-specialty-fibers/mtca-cleanup-orders-and-public-participation-plan

Grant Applicant Workshop

Public Event: Jan. 22, 2026, 10 a.m., in Online webinar
If your organization is working to improve streamflow and aquatic resources in your watershed, you may qualify for our competitive grants.

https://ecology.wa.gov/events/wr/sfr-grants-25-26/january-2026-virtual

Scoping comment period for sustainable aviation fuel

Comment Period: Oct. 6, 2025, 12 p.m. - Nov. 5, 2025, 11:59 p.m.
We are seeking public input to help us determine what to study in the sustainable aviation fuel programmatic environmental impact statement.

https://ecology.wa.gov/events/sea/clean-energy-coordination/sustainable-aviation-fuel-scoping-comment-period

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 173-201A 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 173-337 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

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

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 173-443 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 173-455 WAC – Air Quality Fee Rule

This is the rulemaking page for Chapter 173-455 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-455

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/closed-rulemaking/wac-173-441-446

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 173-423 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 173-339 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