Search Results - Washington State Department of Ecology

This is the rulemaking page for Chapter 173-166 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-166

Chapter 173-167 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 173-167 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 173-424 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 173-423 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 173-217 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 173-925 WAC

This is the rulemaking page for Chapter 173-925 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-925

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 173-187 WAC

This is the rulemaking page for 173-187 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-187

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

Public listening session

Public Event: June 25, 2025, 1:30 p.m., in online webinar
This is an opportunity for you to hear about the preliminary draft for the rulemaking and provide informal feedback to us.

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

Public listening session July 22, 2025

Public Event: July 22, 2025, 6 p.m., in online webinar
This is an opportunity for you to hear about the preliminary draft for the rulemaking and provide informal feedback to us.

https://ecology.wa.gov/events/rulemaking/173-26-and-173-27-wac-shoreline-management-act/public-listening-session-3118b00b3380ae85531227c7f3f0005b

Sabey Data Center, Quincy

Comment Period: Nov. 3, 2025, 12 a.m. - Dec. 14, 2025, 11:59 p.m.
We propose to approve Sabey Data Center’s Building E air quality notice of construction (NOC) application.

https://ecology.wa.gov/events/aq/notice-of-construction-applications/sabey-comment-ends-12-14-25

CyrusOne Data Center, Quincy

Comment Period: Oct. 21, 2025, 12 a.m. - Dec. 1, 2025, 11:59 p.m.
We propose to approve CyrusOne Data Center’s air quality notice of construction (NOC) application.

https://ecology.wa.gov/events/aq/notice-of-construction-applications/cyrusone-comment-ends-12-1-25

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 173-423 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 173-443 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 173-455 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

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

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

Cowlitz Indian Tribal Housing Wastewater Treatment Plant

Comment Period: Oct. 30, 2025, 12 a.m. - Dec. 1, 2025, 11:59 p.m.
We invite you to comment on the draft permit No. WA0040258

https://ecology.wa.gov/events/wq/npdes-discharge-permit/cowlitz-indian-tribal-housing

Washington State Fire Training Academy

Comment Period: Nov. 7, 2025, 12 a.m. - Dec. 8, 2025, 11:59 p.m.
We invite your comments on the reissuance of NPDES permit no. WA0031836.

https://ecology.wa.gov/events/wq/npdes-discharge-permit/wa-state-fire-training-academy

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 173-445 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 - Ozone Depleting Substance Protocol

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 173-491, 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 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

Chapter 173-201A WAC (Human Health 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-hhc

Chapter 173-350 WAC - Organics Management

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-350

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

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 173-337 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

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

Clean Vehicles Program Rulemaking Public Hearing #1

Public Event: June 24, 2025, 9 a.m., in Online webinar

https://ecology.wa.gov/events/cpr/ao24-07-chapter-173-423-wac/clean-vehicles-program-rulemaking-public-hearing-6-25-2025

Clean Vehicles Program Rulemaking Public Hearing #2

Public Event: June 25, 2025, 5 p.m., in Online webinar

https://ecology.wa.gov/events/cpr/ao24-07-chapter-173-423-wac/clean-vehicles-program-rulemaking-public-hearing-6-25-2025-a55dafa1811c3c91179a198be286ae5e

Chapter 173-910 WAC - Mercury Lights Stewardship

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-910

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

WinCo Foods, Walla Walla

Comment Period: Nov. 6, 2025, 12 a.m. - Nov. 21, 2025, 11:59 p.m.
We propose to approve WinCo Foods' air quality notice of construction (NOC) application. We will hold a public comment period if one is requested.

https://ecology.wa.gov/events/aq/notice-of-construction-applications/winco-foods-ww-comment-ends-11-21-25

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

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

Draft NPDES water quality permit

Public Event: March 4, 2025, 5:30 p.m., in Online webinar
We invite you to review and comment on the draft National Pollutant Discharge Elimination System Waste Discharge (NPDES) permit for Georgia-Pacific Camas Mill in Camas (Clark County).

https://ecology.wa.gov/events/swm/georgia-pacific-camas/npdes-water-quality-permit-mar4-webinar

WestRock Mill in Tacoma

Public Event: May 28, 2025, 5:30 p.m., in Online webinar
An online public hearing to accept oral comments will be held on May 28, 2025 at 5:30 p.m.

https://ecology.wa.gov/events/swm/westrock-mill-in-tacoma/westrock-tacoma-water-quality-permit

Shoreline Management Act Environmental Justice listening session

Public Event: July 24, 2025, 12 p.m., in online webinar
This is an opportunity for you to hear about the preliminary draft for the rulemaking and provide informal feedback to us.

https://ecology.wa.gov/events/rulemaking/173-26-and-173-27-wac-shoreline-management-act/shoreline-management-act-environmental-justice-listening-session

Bellingham Mitigation Bank NWS-2019-998 — Public comment period

Comment Period: Oct. 16, 2025, 12 a.m. - Nov. 15, 2025, 11:59 p.m.
The City of Bellingham proposes to establish and operate a wetland bank in Whatcom County.

https://ecology.wa.gov/events/sea/wetland-banks/bellingham-mbi-pn

Wapato Valley Mitigation and Conservation Bank NWS-2015-413 — Public comment period

Comment Period: Oct. 16, 2025, 12 a.m. - Nov. 15, 2025, 11:59 p.m.
Plas Newydd LLC proposes to establish and operate a wetland bank in Clark County.

https://ecology.wa.gov/events/sea/wetland-banks/wapato-mbi-pn

Block 38 West cleanup site, Seattle

Comment Period: Nov. 17, 2025, 12 a.m. - Dec. 16, 2025, 11:59 p.m.
We propose moving the Block 38 West site from the Contaminated Sites List to the No Further Action Sites List because the site has been cleaned up. We invite your comment on the proposal.

https://ecology.wa.gov/events/tcp/delisting-hsl/block-38-west

Chapter 173-201A WAC (Outstanding Resource Waters)

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

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-201a-outstanding-resource-waters

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

Draft NPDES water quality permit

Comment Period: Jan. 30, 2025, 12 a.m. - March 13, 2025, 11:59 p.m.
We invite you to review and comment on the draft National Pollutant Discharge Elimination System Waste Discharge (NPDES) permit for Georgia-Pacific Camas Mill in Camas (Clark County).

https://ecology.wa.gov/events/swm/georgia-pacific-camas/npdes-water-quality-permit