Public input &amp; events &mdash; Listing

We propose to approve Teck Washington's air quality notice of construction (NOC) application for their Pend Oreille Mine. We will hold a public comment period if one is requested.

City of Asotin Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

Announcement of Availability of Draft Permit

SEH America, Inc. Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on draft Water Quality Permit No. WA0039616.

Public Notice of Water Quality Permit Renewal Application — Northwest Alloys Inc., Addy

We invite you to review and comment on the application for the State Waste Discharge permit renewal for Northwest Alloys, Inc. in Addy (Stevens County).

Lamb Weston, Pasco — Air quality notice of construction application

We propose to approve Lamb Weston's Pasco air quality notice of construction (NOC) application.

Mica Landfill, south of Spokane — Comment on periodic review of this cleanup site

You are invited to review and comment on the draft periodic review report.

Tieton Publicly Owned Treatment Works Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0052396.

Public comment period — Battery Energy Storage Systems Scoping Document available for review

We are seeking public input to help us determine what to study in the Battery Energy Storage System Facilities Programmatic Environmental Impact Statement.

Periodo de comentarios públicos — Disponible para revisión: Documento de alcance para sistemas de almacenamiento de energía en baterías

Estamos solicitando la opinión del público para ayudarnos a determinar qué estudiar en la Declaración Programática de Impacto Ambiental para Instalaciones de Almacenamiento de Energía en Baterías.

Draft Release and Public Review — Major Modification of the Industrial Stormwater General Permit

We invite you to review the draft modification of the Industrial Stormwater General Permit and share your comments with us.

City of Chelan Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0020605.

BNSF Railway, Pasco — Air quality notice of construction application – Opportunity to request a public comment period

We propose to approve BNSF Railway's air quality notice of construction (NOC) application. We will hold a public comment period if one is requested.

Clallam Bay Publicly Owned Treatment Works — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0024431.

Clallam Bay Corrections Center Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0039845.

Sekiu Publicly Owned Treatment Works — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0024449.

San Juan County SMP Amendment — Shoreline Master Programs (SMP)

We are seeking comment on the San Juan County shoreline master program (SMP) locally initiated amendment.

Wenatchee Quality Welding, Wenatchee — Environmental review for an air quality notice of construction permit

Comment on the environmental review documents and draft air permit (notice of construction (NOC) permit) for Wenatchee Quality Welding.

Marine Spill Response Corporation — Primary Response Contractor Application

We invite the public and local governments, tribes, and any others, to review and comment on updated Primary Response Contractor (PRC) applications.

City of Shelton Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0023345.

Kinder Morgan – Harbor Island Terminal — Safe and Effective Threshold Determination Report

Class 1 Facilities are required to submit a Safe & Effective Threshold Determination Report that explains when it is safe and/or effective to deploy boom prior to oil transfers at their location.

Draft National Pollutant Discharge Elimination System permit, fact sheet, and Water Quality Agreed Order — HF Sinclair Puget Sound Refinery

We invite you to review and comment on the draft National Pollutant Discharge Elimination System (NPDES) permit renewal, Fact Sheet and Agreed Order for HF Sinclair Puget Sound Refinery (Skagit County) from 12:01 am, Sept. 2 through 11:59 pm, Oct. 14, 2026.

Schenk Packing Company, Inc. — Wastewater Discharge Permit - State Waste Discharge Permit

We invite your comments on the development of the Schenk Packing Company, Inc. draft permit no. ST0005174.

Chelan County PUD No. 1, Wenatchee — Air quality notice of construction application

We propose to approve Chelan County PUD No. 1's air quality notice of construction (NOC) application. We will hold a public comment period if one is requested.

Tacoma Central Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0037087.

Chambers Creek Regional Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0039624.

Draft rule language — 173-350-351 WAC Solid waste facilities

Comment on draft rule language for Solid Waste Facilities rulemaking.

Boeing Developmental Center public comment — Interim action work plan and cleanup documents

We’re holding a public comment for documents related to cleanup of contamination at Boeing Developmental Center (BDC) in Tukwila.

Draft State Waste Discharge permit renewal and fact sheet — Tesoro Logistics Operations LLC

We invite you to review and comment on the draft State Waste Discharge permit renewal and Fact Sheet for Tesoro Logistics Operations LLC (Skagit County) from 12:01 a.m., Sept. 23 through 11:59 p.m., Oct. 23, 2026.

Benton City Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0051349.

Water Resources Program guidance and policy — Determining irrigation efficiency

The Water Resources Program is updating its irrigation efficiency guidance and related documents to reflect best available science.

Hanford Sitewide Permit — Revision 9A comment period

Starting June 29, 2026, we will be seeking input on one of our most important tools for overseeing cleanup of the Hanford Site.

Draft Release and Public Review — Modification of the Phase I Municipal Stormwater General Permit

We invite you to review the draft 2026 modification of the Phase I Municipal Stormwater General Permit and share your comments with us.

Chapter 173-26 and 173-27 WAC, Shoreline Management Act — Proposed rulemaking public comment period

Public comment period is open through Nov. 17.

Air Quality Standards and Impact Levels, Chapters 173-476 and 173-400 WAC — Proposed rulemaking – public comment period

We propose to update two rules: - Chapter 173-476 WAC, Ambient Air Quality Standards - Chapter 173-400 WAC, General Regulations for Air Pollution Sources

Sept. 28, 2026

Open comment periods:

Closing date:

Teck Washington Pend Oreille Mine, Metaline Falls — Air quality notice of construction application – Opportunity to request a public comment period

We propose to approve Teck Washington's air quality notice of construction (NOC) application for their Pend Oreille Mine. We will hold a public comment period if one is requested.

City of Asotin Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

Announcement of Availability of Draft Permit

SEH America, Inc. Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on draft Water Quality Permit No. WA0039616.

Public Notice of Water Quality Permit Renewal Application — Northwest Alloys Inc., Addy

We invite you to review and comment on the application for the State Waste Discharge permit renewal for Northwest Alloys, Inc. in Addy (Stevens County).

Lamb Weston, Pasco — Air quality notice of construction application

We propose to approve Lamb Weston's Pasco air quality notice of construction (NOC) application.

Mica Landfill, south of Spokane — Comment on periodic review of this cleanup site

You are invited to review and comment on the draft periodic review report.

Tieton Publicly Owned Treatment Works Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0052396.

Public comment period — Battery Energy Storage Systems Scoping Document available for review

We are seeking public input to help us determine what to study in the Battery Energy Storage System Facilities Programmatic Environmental Impact Statement.

Periodo de comentarios públicos — Disponible para revisión: Documento de alcance para sistemas de almacenamiento de energía en baterías

Draft Release and Public Review — Major Modification of the Industrial Stormwater General Permit

We invite you to review the draft modification of the Industrial Stormwater General Permit and share your comments with us.

City of Chelan Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0020605.

BNSF Railway, Pasco — Air quality notice of construction application – Opportunity to request a public comment period

We propose to approve BNSF Railway's air quality notice of construction (NOC) application. We will hold a public comment period if one is requested.

Clallam Bay Publicly Owned Treatment Works — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0024431.

Clallam Bay Corrections Center Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0039845.

Sekiu Publicly Owned Treatment Works — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0024449.

San Juan County SMP Amendment — Shoreline Master Programs (SMP)

We are seeking comment on the San Juan County shoreline master program (SMP) locally initiated amendment.

Wenatchee Quality Welding, Wenatchee — Environmental review for an air quality notice of construction permit

Comment on the environmental review documents and draft air permit (notice of construction (NOC) permit) for Wenatchee Quality Welding.

Marine Spill Response Corporation — Primary Response Contractor Application

We invite the public and local governments, tribes, and any others, to review and comment on updated Primary Response Contractor (PRC) applications.

City of Shelton Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0023345.

Kinder Morgan – Harbor Island Terminal — Safe and Effective Threshold Determination Report

Class 1 Facilities are required to submit a Safe & Effective Threshold Determination Report that explains when it is safe and/or effective to deploy boom prior to oil transfers at their location.

Draft National Pollutant Discharge Elimination System permit, fact sheet, and Water Quality Agreed Order — HF Sinclair Puget Sound Refinery

Schenk Packing Company, Inc. — Wastewater Discharge Permit - State Waste Discharge Permit

We invite your comments on the development of the Schenk Packing Company, Inc. draft permit no. ST0005174.

Chelan County PUD No. 1, Wenatchee — Air quality notice of construction application

We propose to approve Chelan County PUD No. 1's air quality notice of construction (NOC) application. We will hold a public comment period if one is requested.

Tacoma Central Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0037087.

Chambers Creek Regional Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0039624.

Draft rule language — 173-350-351 WAC Solid waste facilities

Comment on draft rule language for Solid Waste Facilities rulemaking.

Boeing Developmental Center public comment — Interim action work plan and cleanup documents

We’re holding a public comment for documents related to cleanup of contamination at Boeing Developmental Center (BDC) in Tukwila.

Draft State Waste Discharge permit renewal and fact sheet — Tesoro Logistics Operations LLC

Benton City Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0051349.

Water Resources Program guidance and policy — Determining irrigation efficiency

The Water Resources Program is updating its irrigation efficiency guidance and related documents to reflect best available science.

Hanford Sitewide Permit — Revision 9A comment period

Starting June 29, 2026, we will be seeking input on one of our most important tools for overseeing cleanup of the Hanford Site.

Draft Release and Public Review — Modification of the Phase I Municipal Stormwater General Permit

We invite you to review the draft 2026 modification of the Phase I Municipal Stormwater General Permit and share your comments with us.

Chapter 173-26 and 173-27 WAC, Shoreline Management Act — Proposed rulemaking public comment period

Public comment period is open through Nov. 17.

Air Quality Standards and Impact Levels, Chapters 173-476 and 173-400 WAC — Proposed rulemaking – public comment period

We propose to update two rules: - Chapter 173-476 WAC, Ambient Air Quality Standards - Chapter 173-400 WAC, General Regulations for Air Pollution Sources

Information session - Determining irrigation efficiency

Meetings & Hearings

Webinar

Start: 10 a.m.

Learn about the proposed updates. There will also be time for questions and answers.

> See event details

Hanford Sitewide Permit public hearing - Hanford Sitewide Revision 9A

Meetings & Hearings

Hermiston, OR

Start: 5:30 p.m.

A public hearing to give the public an opportunity to submit oral testimony.

> See event details

Teck Washington Pend Oreille Mine, Metaline Falls — Air quality notice of construction application – Opportunity to request a public comment period

We propose to approve Teck Washington's air quality notice of construction (NOC) application for their Pend Oreille Mine. We will hold a public comment period if one is requested.

City of Asotin Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

Announcement of Availability of Draft Permit

SEH America, Inc. Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on draft Water Quality Permit No. WA0039616.

Public Notice of Water Quality Permit Renewal Application — Northwest Alloys Inc., Addy

We invite you to review and comment on the application for the State Waste Discharge permit renewal for Northwest Alloys, Inc. in Addy (Stevens County).

Lamb Weston, Pasco — Air quality notice of construction application

We propose to approve Lamb Weston's Pasco air quality notice of construction (NOC) application.

Mica Landfill, south of Spokane — Comment on periodic review of this cleanup site

You are invited to review and comment on the draft periodic review report.

Tieton Publicly Owned Treatment Works Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0052396.

Public comment period — Battery Energy Storage Systems Scoping Document available for review

We are seeking public input to help us determine what to study in the Battery Energy Storage System Facilities Programmatic Environmental Impact Statement.

Periodo de comentarios públicos — Disponible para revisión: Documento de alcance para sistemas de almacenamiento de energía en baterías

Draft Release and Public Review — Major Modification of the Industrial Stormwater General Permit

We invite you to review the draft modification of the Industrial Stormwater General Permit and share your comments with us.

City of Chelan Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0020605.

BNSF Railway, Pasco — Air quality notice of construction application – Opportunity to request a public comment period

We propose to approve BNSF Railway's air quality notice of construction (NOC) application. We will hold a public comment period if one is requested.

Clallam Bay Publicly Owned Treatment Works — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0024431.

Clallam Bay Corrections Center Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0039845.

Sekiu Publicly Owned Treatment Works — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0024449.

San Juan County SMP Amendment — Shoreline Master Programs (SMP)

We are seeking comment on the San Juan County shoreline master program (SMP) locally initiated amendment.

Wenatchee Quality Welding, Wenatchee — Environmental review for an air quality notice of construction permit

Comment on the environmental review documents and draft air permit (notice of construction (NOC) permit) for Wenatchee Quality Welding.

Marine Spill Response Corporation — Primary Response Contractor Application

We invite the public and local governments, tribes, and any others, to review and comment on updated Primary Response Contractor (PRC) applications.

City of Shelton Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0023345.

Kinder Morgan – Harbor Island Terminal — Safe and Effective Threshold Determination Report

Class 1 Facilities are required to submit a Safe & Effective Threshold Determination Report that explains when it is safe and/or effective to deploy boom prior to oil transfers at their location.

Draft National Pollutant Discharge Elimination System permit, fact sheet, and Water Quality Agreed Order — HF Sinclair Puget Sound Refinery

Schenk Packing Company, Inc. — Wastewater Discharge Permit - State Waste Discharge Permit

We invite your comments on the development of the Schenk Packing Company, Inc. draft permit no. ST0005174.

Chelan County PUD No. 1, Wenatchee — Air quality notice of construction application

We propose to approve Chelan County PUD No. 1's air quality notice of construction (NOC) application. We will hold a public comment period if one is requested.

Tacoma Central Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0037087.

Chambers Creek Regional Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0039624.

Draft rule language — 173-350-351 WAC Solid waste facilities

Comment on draft rule language for Solid Waste Facilities rulemaking.

Boeing Developmental Center public comment — Interim action work plan and cleanup documents

We’re holding a public comment for documents related to cleanup of contamination at Boeing Developmental Center (BDC) in Tukwila.

Draft State Waste Discharge permit renewal and fact sheet — Tesoro Logistics Operations LLC

Benton City Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0051349.

Water Resources Program guidance and policy — Determining irrigation efficiency

The Water Resources Program is updating its irrigation efficiency guidance and related documents to reflect best available science.

Hanford Sitewide Permit — Revision 9A comment period

Starting June 29, 2026, we will be seeking input on one of our most important tools for overseeing cleanup of the Hanford Site.

Draft Release and Public Review — Modification of the Phase I Municipal Stormwater General Permit

We invite you to review the draft 2026 modification of the Phase I Municipal Stormwater General Permit and share your comments with us.

Chapter 173-26 and 173-27 WAC, Shoreline Management Act — Proposed rulemaking public comment period

Public comment period is open through Nov. 17.

Air Quality Standards and Impact Levels, Chapters 173-476 and 173-400 WAC — Proposed rulemaking – public comment period

We propose to update two rules: - Chapter 173-476 WAC, Ambient Air Quality Standards - Chapter 173-400 WAC, General Regulations for Air Pollution Sources

Labeling for clarity - Best Practices for Washington's Waste Containers

Meetings & Hearings

Webinar

Start: 10:30 a.m.

Learn about best practices from Washington service providers and others about labels for waste containers.

> See event details

Hanford Sitewide Permit public hearing - Hanford Sitewide Revision 9A

Meetings & Hearings

Richland, WA

Start: 5:30 p.m.

A public hearing to give the public an opportunity to submit oral testimony.

> See event details

City of Asotin Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

Announcement of Availability of Draft Permit

SEH America, Inc. Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on draft Water Quality Permit No. WA0039616.

Public Notice of Water Quality Permit Renewal Application — Northwest Alloys Inc., Addy

We invite you to review and comment on the application for the State Waste Discharge permit renewal for Northwest Alloys, Inc. in Addy (Stevens County).

Lamb Weston, Pasco — Air quality notice of construction application

We propose to approve Lamb Weston's Pasco air quality notice of construction (NOC) application.

Mica Landfill, south of Spokane — Comment on periodic review of this cleanup site

You are invited to review and comment on the draft periodic review report.

Tieton Publicly Owned Treatment Works Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0052396.

Public comment period — Battery Energy Storage Systems Scoping Document available for review

We are seeking public input to help us determine what to study in the Battery Energy Storage System Facilities Programmatic Environmental Impact Statement.

Periodo de comentarios públicos — Disponible para revisión: Documento de alcance para sistemas de almacenamiento de energía en baterías

Draft Release and Public Review — Major Modification of the Industrial Stormwater General Permit

We invite you to review the draft modification of the Industrial Stormwater General Permit and share your comments with us.

City of Chelan Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0020605.

BNSF Railway, Pasco — Air quality notice of construction application – Opportunity to request a public comment period

We propose to approve BNSF Railway's air quality notice of construction (NOC) application. We will hold a public comment period if one is requested.

Clallam Bay Publicly Owned Treatment Works — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0024431.

Clallam Bay Corrections Center Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0039845.

Sekiu Publicly Owned Treatment Works — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0024449.

San Juan County SMP Amendment — Shoreline Master Programs (SMP)

We are seeking comment on the San Juan County shoreline master program (SMP) locally initiated amendment.

Wenatchee Quality Welding, Wenatchee — Environmental review for an air quality notice of construction permit

Comment on the environmental review documents and draft air permit (notice of construction (NOC) permit) for Wenatchee Quality Welding.

Marine Spill Response Corporation — Primary Response Contractor Application

We invite the public and local governments, tribes, and any others, to review and comment on updated Primary Response Contractor (PRC) applications.

City of Shelton Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0023345.

Kinder Morgan – Harbor Island Terminal — Safe and Effective Threshold Determination Report

Class 1 Facilities are required to submit a Safe & Effective Threshold Determination Report that explains when it is safe and/or effective to deploy boom prior to oil transfers at their location.

Draft National Pollutant Discharge Elimination System permit, fact sheet, and Water Quality Agreed Order — HF Sinclair Puget Sound Refinery

Schenk Packing Company, Inc. — Wastewater Discharge Permit - State Waste Discharge Permit

We invite your comments on the development of the Schenk Packing Company, Inc. draft permit no. ST0005174.

Chelan County PUD No. 1, Wenatchee — Air quality notice of construction application

We propose to approve Chelan County PUD No. 1's air quality notice of construction (NOC) application. We will hold a public comment period if one is requested.

Tacoma Central Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0037087.

Chambers Creek Regional Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0039624.

Draft rule language — 173-350-351 WAC Solid waste facilities

Comment on draft rule language for Solid Waste Facilities rulemaking.

Boeing Developmental Center public comment — Interim action work plan and cleanup documents

We’re holding a public comment for documents related to cleanup of contamination at Boeing Developmental Center (BDC) in Tukwila.

Draft State Waste Discharge permit renewal and fact sheet — Tesoro Logistics Operations LLC

Benton City Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0051349.

Water Resources Program guidance and policy — Determining irrigation efficiency

The Water Resources Program is updating its irrigation efficiency guidance and related documents to reflect best available science.

Hanford Sitewide Permit — Revision 9A comment period

Starting June 29, 2026, we will be seeking input on one of our most important tools for overseeing cleanup of the Hanford Site.

Draft Release and Public Review — Modification of the Phase I Municipal Stormwater General Permit

We invite you to review the draft 2026 modification of the Phase I Municipal Stormwater General Permit and share your comments with us.

Chapter 173-26 and 173-27 WAC, Shoreline Management Act — Proposed rulemaking public comment period

Public comment period is open through Nov. 17.

Air Quality Standards and Impact Levels, Chapters 173-476 and 173-400 WAC — Proposed rulemaking – public comment period

We propose to update two rules: - Chapter 173-476 WAC, Ambient Air Quality Standards - Chapter 173-400 WAC, General Regulations for Air Pollution Sources

Open comment periods:

Closing date:

Tieton Publicly Owned Treatment Works Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0052396.

Public comment period — Battery Energy Storage Systems Scoping Document available for review

We are seeking public input to help us determine what to study in the Battery Energy Storage System Facilities Programmatic Environmental Impact Statement.

Periodo de comentarios públicos — Disponible para revisión: Documento de alcance para sistemas de almacenamiento de energía en baterías

Draft Release and Public Review — Major Modification of the Industrial Stormwater General Permit

We invite you to review the draft modification of the Industrial Stormwater General Permit and share your comments with us.

City of Chelan Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0020605.

BNSF Railway, Pasco — Air quality notice of construction application – Opportunity to request a public comment period

We propose to approve BNSF Railway's air quality notice of construction (NOC) application. We will hold a public comment period if one is requested.

Clallam Bay Publicly Owned Treatment Works — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0024431.

Clallam Bay Corrections Center Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0039845.

Sekiu Publicly Owned Treatment Works — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0024449.

San Juan County SMP Amendment — Shoreline Master Programs (SMP)

We are seeking comment on the San Juan County shoreline master program (SMP) locally initiated amendment.

Wenatchee Quality Welding, Wenatchee — Environmental review for an air quality notice of construction permit

Comment on the environmental review documents and draft air permit (notice of construction (NOC) permit) for Wenatchee Quality Welding.

Marine Spill Response Corporation — Primary Response Contractor Application

We invite the public and local governments, tribes, and any others, to review and comment on updated Primary Response Contractor (PRC) applications.

City of Shelton Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0023345.

Kinder Morgan – Harbor Island Terminal — Safe and Effective Threshold Determination Report

Class 1 Facilities are required to submit a Safe & Effective Threshold Determination Report that explains when it is safe and/or effective to deploy boom prior to oil transfers at their location.

Draft National Pollutant Discharge Elimination System permit, fact sheet, and Water Quality Agreed Order — HF Sinclair Puget Sound Refinery

Schenk Packing Company, Inc. — Wastewater Discharge Permit - State Waste Discharge Permit

We invite your comments on the development of the Schenk Packing Company, Inc. draft permit no. ST0005174.

Chelan County PUD No. 1, Wenatchee — Air quality notice of construction application

We propose to approve Chelan County PUD No. 1's air quality notice of construction (NOC) application. We will hold a public comment period if one is requested.

Tacoma Central Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0037087.

Chambers Creek Regional Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0039624.

Draft rule language — 173-350-351 WAC Solid waste facilities

Comment on draft rule language for Solid Waste Facilities rulemaking.

Boeing Developmental Center public comment — Interim action work plan and cleanup documents

We’re holding a public comment for documents related to cleanup of contamination at Boeing Developmental Center (BDC) in Tukwila.

Draft State Waste Discharge permit renewal and fact sheet — Tesoro Logistics Operations LLC

Benton City Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0051349.

Water Resources Program guidance and policy — Determining irrigation efficiency

The Water Resources Program is updating its irrigation efficiency guidance and related documents to reflect best available science.

Hanford Sitewide Permit — Revision 9A comment period

Starting June 29, 2026, we will be seeking input on one of our most important tools for overseeing cleanup of the Hanford Site.

Draft Release and Public Review — Modification of the Phase I Municipal Stormwater General Permit

We invite you to review the draft 2026 modification of the Phase I Municipal Stormwater General Permit and share your comments with us.

Chapter 173-26 and 173-27 WAC, Shoreline Management Act — Proposed rulemaking public comment period

Public comment period is open through Nov. 17.

Air Quality Standards and Impact Levels, Chapters 173-476 and 173-400 WAC — Proposed rulemaking – public comment period

We propose to update two rules: - Chapter 173-476 WAC, Ambient Air Quality Standards - Chapter 173-400 WAC, General Regulations for Air Pollution Sources

Open comment periods:

Closing date:

Draft Release and Public Review — Major Modification of the Industrial Stormwater General Permit

We invite you to review the draft modification of the Industrial Stormwater General Permit and share your comments with us.

City of Chelan Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0020605.

BNSF Railway, Pasco — Air quality notice of construction application – Opportunity to request a public comment period

We propose to approve BNSF Railway's air quality notice of construction (NOC) application. We will hold a public comment period if one is requested.

Clallam Bay Publicly Owned Treatment Works — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0024431.

Clallam Bay Corrections Center Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0039845.

Sekiu Publicly Owned Treatment Works — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0024449.

San Juan County SMP Amendment — Shoreline Master Programs (SMP)

We are seeking comment on the San Juan County shoreline master program (SMP) locally initiated amendment.

Wenatchee Quality Welding, Wenatchee — Environmental review for an air quality notice of construction permit

Comment on the environmental review documents and draft air permit (notice of construction (NOC) permit) for Wenatchee Quality Welding.

Marine Spill Response Corporation — Primary Response Contractor Application

We invite the public and local governments, tribes, and any others, to review and comment on updated Primary Response Contractor (PRC) applications.

City of Shelton Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0023345.

Kinder Morgan – Harbor Island Terminal — Safe and Effective Threshold Determination Report

Class 1 Facilities are required to submit a Safe & Effective Threshold Determination Report that explains when it is safe and/or effective to deploy boom prior to oil transfers at their location.

Draft National Pollutant Discharge Elimination System permit, fact sheet, and Water Quality Agreed Order — HF Sinclair Puget Sound Refinery

Schenk Packing Company, Inc. — Wastewater Discharge Permit - State Waste Discharge Permit

We invite your comments on the development of the Schenk Packing Company, Inc. draft permit no. ST0005174.

Chelan County PUD No. 1, Wenatchee — Air quality notice of construction application

We propose to approve Chelan County PUD No. 1's air quality notice of construction (NOC) application. We will hold a public comment period if one is requested.

Tacoma Central Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0037087.

Chambers Creek Regional Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0039624.

Draft rule language — 173-350-351 WAC Solid waste facilities

Comment on draft rule language for Solid Waste Facilities rulemaking.

Boeing Developmental Center public comment — Interim action work plan and cleanup documents

We’re holding a public comment for documents related to cleanup of contamination at Boeing Developmental Center (BDC) in Tukwila.

Draft State Waste Discharge permit renewal and fact sheet — Tesoro Logistics Operations LLC

Benton City Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0051349.

Water Resources Program guidance and policy — Determining irrigation efficiency

The Water Resources Program is updating its irrigation efficiency guidance and related documents to reflect best available science.

Hanford Sitewide Permit — Revision 9A comment period

Starting June 29, 2026, we will be seeking input on one of our most important tools for overseeing cleanup of the Hanford Site.

Draft Release and Public Review — Modification of the Phase I Municipal Stormwater General Permit

We invite you to review the draft 2026 modification of the Phase I Municipal Stormwater General Permit and share your comments with us.

Chapter 173-26 and 173-27 WAC, Shoreline Management Act — Proposed rulemaking public comment period

Public comment period is open through Nov. 17.

Air Quality Standards and Impact Levels, Chapters 173-476 and 173-400 WAC — Proposed rulemaking – public comment period

We propose to update two rules: - Chapter 173-476 WAC, Ambient Air Quality Standards - Chapter 173-400 WAC, General Regulations for Air Pollution Sources

Oct. 3, 2026

Open comment periods:

Closing date:

BNSF Railway, Pasco — Air quality notice of construction application – Opportunity to request a public comment period

We propose to approve BNSF Railway's air quality notice of construction (NOC) application. We will hold a public comment period if one is requested.

Clallam Bay Publicly Owned Treatment Works — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0024431.

Clallam Bay Corrections Center Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0039845.

Sekiu Publicly Owned Treatment Works — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0024449.

San Juan County SMP Amendment — Shoreline Master Programs (SMP)

We are seeking comment on the San Juan County shoreline master program (SMP) locally initiated amendment.

Wenatchee Quality Welding, Wenatchee — Environmental review for an air quality notice of construction permit

Comment on the environmental review documents and draft air permit (notice of construction (NOC) permit) for Wenatchee Quality Welding.

Marine Spill Response Corporation — Primary Response Contractor Application

We invite the public and local governments, tribes, and any others, to review and comment on updated Primary Response Contractor (PRC) applications.

City of Shelton Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0023345.

Kinder Morgan – Harbor Island Terminal — Safe and Effective Threshold Determination Report

Class 1 Facilities are required to submit a Safe & Effective Threshold Determination Report that explains when it is safe and/or effective to deploy boom prior to oil transfers at their location.

Draft National Pollutant Discharge Elimination System permit, fact sheet, and Water Quality Agreed Order — HF Sinclair Puget Sound Refinery

Schenk Packing Company, Inc. — Wastewater Discharge Permit - State Waste Discharge Permit

We invite your comments on the development of the Schenk Packing Company, Inc. draft permit no. ST0005174.

Chelan County PUD No. 1, Wenatchee — Air quality notice of construction application

We propose to approve Chelan County PUD No. 1's air quality notice of construction (NOC) application. We will hold a public comment period if one is requested.

Tacoma Central Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0037087.

Chambers Creek Regional Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on the proposed draft permit for WA0039624.

Draft rule language — 173-350-351 WAC Solid waste facilities

Comment on draft rule language for Solid Waste Facilities rulemaking.

Boeing Developmental Center public comment — Interim action work plan and cleanup documents

We’re holding a public comment for documents related to cleanup of contamination at Boeing Developmental Center (BDC) in Tukwila.

Draft State Waste Discharge permit renewal and fact sheet — Tesoro Logistics Operations LLC

Benton City Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit

We invite you to comment on Draft Permit No. WA0051349.

Water Resources Program guidance and policy — Determining irrigation efficiency

The Water Resources Program is updating its irrigation efficiency guidance and related documents to reflect best available science.

Hanford Sitewide Permit — Revision 9A comment period

Starting June 29, 2026, we will be seeking input on one of our most important tools for overseeing cleanup of the Hanford Site.

Draft Release and Public Review — Modification of the Phase I Municipal Stormwater General Permit

We invite you to review the draft 2026 modification of the Phase I Municipal Stormwater General Permit and share your comments with us.

Chapter 173-26 and 173-27 WAC, Shoreline Management Act — Proposed rulemaking public comment period

Public comment period is open through Nov. 17.

Air Quality Standards and Impact Levels, Chapters 173-476 and 173-400 WAC — Proposed rulemaking – public comment period