Public input & events — Listing

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Open the dates below to see all Ecology public comment periods and events during one week. These tools will help you filter to find what you're looking for:

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Open comment periods:
Closing date:
Simplot Soilbuilders Sunnyside — Draft cleanup plan and site studies
Sept. 13, 2026

We invite your comments on a plan to clean up soil and groundwater at this site, as well as supporting documents.

City of Anacortes Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 15, 2026

We invite your comments on the development of the City of Anacortes Wastewater Treatment Plant draft permit no. WA0020257.

TransAlta, Lewis County — Environmental review and air permit – Public comment period EXTENDED
Sept. 15, 2026

Comment on the environmental review documents and draft air permit (Prevention of Significant Deterioration, PSD) for TransAlta’s proposed coal-to-gas transition project.

Maritime Fire and Safety Association (MFSA) — Oil Spill Contingency Plan
Sept. 18, 2026

Ecology invites interested members of the public, local, and tribal governments to review and comment on required 5-year updates to industry-written oil spill contingency plans.

Public input survey — Washington's Water Future
Sept. 18, 2026

One way to engage in the Washington's Water Future initiative is to take the online survey between July 8 – Aug. 31, 2026.

Draft toolkit comment period — Clean energy environmental justice guidance
Sept. 18, 2026

We invite you to provide feedback on a Draft Environmental Justice Toolkit for Clean Energy projects through Sept. 18.

Maxum Petroleum Class 2 — Equivalent Compliance Plan
Sept. 19, 2026

Delivering facilities may submit an equivalent compliance plan to meet the alternative measures required in WAC 173-180-221(9) and 173-180-222(2). The Plan’s objective is to provide an equivalent or greater level of environmental protection as the applicable alternative measures in the rule.

Leavenworth National Fish Hatchery — 401 certification
Sept. 19, 2026

We are seeking feedback on water quality conditions we should consider to ensure Federal Aquaculture Facilities, including the Leavenworth National Fish Hatchery, meet state standards.

Amazon IWA6, Pasco — Air quality notice of construction application – Opportunity to request a public comment period
Sept. 20, 2026

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

Midway Sewer District Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 21, 2026

We invite your comments on the development of the Midway Sewer District Wastewater Treatment Plant draft permit no. WA0020958.

Sudbury Road Landfill, Walla Walla — Air quality notice of construction application
Sept. 21, 2026

We propose to approve Sudbury Road Landfill's air quality notice of construction (NOC) application.

Norm Nelson Inc. Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 23, 2026

We invite you to comment on draft National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit No. WA0991004.

Tru-Grit Abrasives Inc. cleanup, Tacoma — Interim action plan, public participation plan, and SEPA determination of non-significance
Sept. 24, 2026

We invite you to review and comment on a plan for a partial cleanup at this contaminated site, and related documents.

Upper Clear Creek Mitigation Bank — Public comment period
Sept. 25, 2026

The Port of Tacoma is proposing to amend the Mitigation Banking Instrument for the Upper Clear Creek Mitigation Bank site located within Pierce County.

241-S Tank Farm Exhausters — Notice of Construction Approval Order DE26NWP-001
Sept. 25, 2026

We are holding a 30-day public comment period on draft Approval Order DE26NWP-001, which would authorize use of three new portable exhausters in the 241-S Single Shell Tank (SST) Farm.

Single-shell tank exhausters — NOC Approval Order - DE05NWP-002, Revision 4
Sept. 25, 2026

We are holding a 30-day public comment period under WAC 173-400-171 (3)(n) for a Notice of Construction (NOC) Application which has been determined to be of significant public interest.

Public Notice of Water Quality Permit Renewal Application — Northwest Alloys Inc., Addy
Sept. 30, 2026

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
Sept. 30, 2026

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
Sept. 30, 2026

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

Public comment period — Battery Energy Storage Systems Scoping Document available for review
Oct. 1, 2026

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
Oct. 1, 2026

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
Oct. 2, 2026

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

Marine Spill Response Corporation — Primary Response Contractor Application
Oct. 12, 2026

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

Draft National Pollutant Discharge Elimination System permit, fact sheet, and Water Quality Agreed Order — HF Sinclair Puget Sound Refinery
Oct. 14, 2026

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.

Water Resources Program guidance and policy — Determining irrigation efficiency
Oct. 26, 2026

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
Oct. 27, 2026

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
Nov. 2, 2026

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

TransAlta, Lewis County - Environmental review and air permit – public hearing online
Meetings & Hearings
Online
Start: 6 p.m.
Register
We are holding a public hearing about the environmental review documents and draft air permit (Prevention of Significant Deterioration, PSD) for TransAlta’s proposed coal-to-gas transition project.
> See event details
City of Anacortes Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 15, 2026

We invite your comments on the development of the City of Anacortes Wastewater Treatment Plant draft permit no. WA0020257.

TransAlta, Lewis County — Environmental review and air permit – Public comment period EXTENDED
Sept. 15, 2026

Comment on the environmental review documents and draft air permit (Prevention of Significant Deterioration, PSD) for TransAlta’s proposed coal-to-gas transition project.

Maritime Fire and Safety Association (MFSA) — Oil Spill Contingency Plan
Sept. 18, 2026

Ecology invites interested members of the public, local, and tribal governments to review and comment on required 5-year updates to industry-written oil spill contingency plans.

Public input survey — Washington's Water Future
Sept. 18, 2026

One way to engage in the Washington's Water Future initiative is to take the online survey between July 8 – Aug. 31, 2026.

Draft toolkit comment period — Clean energy environmental justice guidance
Sept. 18, 2026

We invite you to provide feedback on a Draft Environmental Justice Toolkit for Clean Energy projects through Sept. 18.

Maxum Petroleum Class 2 — Equivalent Compliance Plan
Sept. 19, 2026

Delivering facilities may submit an equivalent compliance plan to meet the alternative measures required in WAC 173-180-221(9) and 173-180-222(2). The Plan’s objective is to provide an equivalent or greater level of environmental protection as the applicable alternative measures in the rule.

Leavenworth National Fish Hatchery — 401 certification
Sept. 19, 2026

We are seeking feedback on water quality conditions we should consider to ensure Federal Aquaculture Facilities, including the Leavenworth National Fish Hatchery, meet state standards.

Amazon IWA6, Pasco — Air quality notice of construction application – Opportunity to request a public comment period
Sept. 20, 2026

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

Midway Sewer District Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 21, 2026

We invite your comments on the development of the Midway Sewer District Wastewater Treatment Plant draft permit no. WA0020958.

Sudbury Road Landfill, Walla Walla — Air quality notice of construction application
Sept. 21, 2026

We propose to approve Sudbury Road Landfill's air quality notice of construction (NOC) application.

Norm Nelson Inc. Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 23, 2026

We invite you to comment on draft National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit No. WA0991004.

Tru-Grit Abrasives Inc. cleanup, Tacoma — Interim action plan, public participation plan, and SEPA determination of non-significance
Sept. 24, 2026

We invite you to review and comment on a plan for a partial cleanup at this contaminated site, and related documents.

Upper Clear Creek Mitigation Bank — Public comment period
Sept. 25, 2026

The Port of Tacoma is proposing to amend the Mitigation Banking Instrument for the Upper Clear Creek Mitigation Bank site located within Pierce County.

241-S Tank Farm Exhausters — Notice of Construction Approval Order DE26NWP-001
Sept. 25, 2026

We are holding a 30-day public comment period on draft Approval Order DE26NWP-001, which would authorize use of three new portable exhausters in the 241-S Single Shell Tank (SST) Farm.

Single-shell tank exhausters — NOC Approval Order - DE05NWP-002, Revision 4
Sept. 25, 2026

We are holding a 30-day public comment period under WAC 173-400-171 (3)(n) for a Notice of Construction (NOC) Application which has been determined to be of significant public interest.

Public Notice of Water Quality Permit Renewal Application — Northwest Alloys Inc., Addy
Sept. 30, 2026

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
Sept. 30, 2026

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
Sept. 30, 2026

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

Public comment period — Battery Energy Storage Systems Scoping Document available for review
Oct. 1, 2026

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
Oct. 1, 2026

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
Oct. 2, 2026

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

Marine Spill Response Corporation — Primary Response Contractor Application
Oct. 12, 2026

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

Draft National Pollutant Discharge Elimination System permit, fact sheet, and Water Quality Agreed Order — HF Sinclair Puget Sound Refinery
Oct. 14, 2026

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.

Water Resources Program guidance and policy — Determining irrigation efficiency
Oct. 26, 2026

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
Oct. 27, 2026

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
Nov. 2, 2026

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

Public scoping meeting - Battery Energy Storage Systems Scoping Document available for review
Meetings & Hearings
Webinar
Start: 9 a.m.
Register
We are holding a public meeting for the public to provide input on what we will study in the Battery Energy Storage Systems environmental study.
> See event details
Reunión virtual 1 - Determinación de alcance para la declaración programática de impacto ambiental de instalaciones de almacenamiento de energía en baterías
Meetings & Hearings
Webinar
Start: 9 a.m.
Register
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.
> See event details
City of Anacortes Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 15, 2026

We invite your comments on the development of the City of Anacortes Wastewater Treatment Plant draft permit no. WA0020257.

TransAlta, Lewis County — Environmental review and air permit – Public comment period EXTENDED
Sept. 15, 2026

Comment on the environmental review documents and draft air permit (Prevention of Significant Deterioration, PSD) for TransAlta’s proposed coal-to-gas transition project.

Maritime Fire and Safety Association (MFSA) — Oil Spill Contingency Plan
Sept. 18, 2026

Ecology invites interested members of the public, local, and tribal governments to review and comment on required 5-year updates to industry-written oil spill contingency plans.

Public input survey — Washington's Water Future
Sept. 18, 2026

One way to engage in the Washington's Water Future initiative is to take the online survey between July 8 – Aug. 31, 2026.

Draft toolkit comment period — Clean energy environmental justice guidance
Sept. 18, 2026

We invite you to provide feedback on a Draft Environmental Justice Toolkit for Clean Energy projects through Sept. 18.

Maxum Petroleum Class 2 — Equivalent Compliance Plan
Sept. 19, 2026

Delivering facilities may submit an equivalent compliance plan to meet the alternative measures required in WAC 173-180-221(9) and 173-180-222(2). The Plan’s objective is to provide an equivalent or greater level of environmental protection as the applicable alternative measures in the rule.

Leavenworth National Fish Hatchery — 401 certification
Sept. 19, 2026

We are seeking feedback on water quality conditions we should consider to ensure Federal Aquaculture Facilities, including the Leavenworth National Fish Hatchery, meet state standards.

Amazon IWA6, Pasco — Air quality notice of construction application – Opportunity to request a public comment period
Sept. 20, 2026

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

Midway Sewer District Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 21, 2026

We invite your comments on the development of the Midway Sewer District Wastewater Treatment Plant draft permit no. WA0020958.

Sudbury Road Landfill, Walla Walla — Air quality notice of construction application
Sept. 21, 2026

We propose to approve Sudbury Road Landfill's air quality notice of construction (NOC) application.

Norm Nelson Inc. Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 23, 2026

We invite you to comment on draft National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit No. WA0991004.

Tru-Grit Abrasives Inc. cleanup, Tacoma — Interim action plan, public participation plan, and SEPA determination of non-significance
Sept. 24, 2026

We invite you to review and comment on a plan for a partial cleanup at this contaminated site, and related documents.

Upper Clear Creek Mitigation Bank — Public comment period
Sept. 25, 2026

The Port of Tacoma is proposing to amend the Mitigation Banking Instrument for the Upper Clear Creek Mitigation Bank site located within Pierce County.

241-S Tank Farm Exhausters — Notice of Construction Approval Order DE26NWP-001
Sept. 25, 2026

We are holding a 30-day public comment period on draft Approval Order DE26NWP-001, which would authorize use of three new portable exhausters in the 241-S Single Shell Tank (SST) Farm.

Single-shell tank exhausters — NOC Approval Order - DE05NWP-002, Revision 4
Sept. 25, 2026

We are holding a 30-day public comment period under WAC 173-400-171 (3)(n) for a Notice of Construction (NOC) Application which has been determined to be of significant public interest.

Public Notice of Water Quality Permit Renewal Application — Northwest Alloys Inc., Addy
Sept. 30, 2026

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
Sept. 30, 2026

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
Sept. 30, 2026

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

Public comment period — Battery Energy Storage Systems Scoping Document available for review
Oct. 1, 2026

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
Oct. 1, 2026

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
Oct. 2, 2026

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

Marine Spill Response Corporation — Primary Response Contractor Application
Oct. 12, 2026

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

Draft National Pollutant Discharge Elimination System permit, fact sheet, and Water Quality Agreed Order — HF Sinclair Puget Sound Refinery
Oct. 14, 2026

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.

Water Resources Program guidance and policy — Determining irrigation efficiency
Oct. 26, 2026

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
Oct. 27, 2026

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
Nov. 2, 2026

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

Color-coding for clarity - Making Washington's New Bin Standards Work
Meetings & Hearings
Webinar
Start: 10:30 a.m.
Bin colors public meeting 9-16-26
> See event details
Maritime Fire and Safety Association (MFSA) — Oil Spill Contingency Plan
Sept. 18, 2026

Ecology invites interested members of the public, local, and tribal governments to review and comment on required 5-year updates to industry-written oil spill contingency plans.

Public input survey — Washington's Water Future
Sept. 18, 2026

One way to engage in the Washington's Water Future initiative is to take the online survey between July 8 – Aug. 31, 2026.

Draft toolkit comment period — Clean energy environmental justice guidance
Sept. 18, 2026

We invite you to provide feedback on a Draft Environmental Justice Toolkit for Clean Energy projects through Sept. 18.

Maxum Petroleum Class 2 — Equivalent Compliance Plan
Sept. 19, 2026

Delivering facilities may submit an equivalent compliance plan to meet the alternative measures required in WAC 173-180-221(9) and 173-180-222(2). The Plan’s objective is to provide an equivalent or greater level of environmental protection as the applicable alternative measures in the rule.

Leavenworth National Fish Hatchery — 401 certification
Sept. 19, 2026

We are seeking feedback on water quality conditions we should consider to ensure Federal Aquaculture Facilities, including the Leavenworth National Fish Hatchery, meet state standards.

Amazon IWA6, Pasco — Air quality notice of construction application – Opportunity to request a public comment period
Sept. 20, 2026

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

Midway Sewer District Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 21, 2026

We invite your comments on the development of the Midway Sewer District Wastewater Treatment Plant draft permit no. WA0020958.

Sudbury Road Landfill, Walla Walla — Air quality notice of construction application
Sept. 21, 2026

We propose to approve Sudbury Road Landfill's air quality notice of construction (NOC) application.

Norm Nelson Inc. Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 23, 2026

We invite you to comment on draft National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit No. WA0991004.

Tru-Grit Abrasives Inc. cleanup, Tacoma — Interim action plan, public participation plan, and SEPA determination of non-significance
Sept. 24, 2026

We invite you to review and comment on a plan for a partial cleanup at this contaminated site, and related documents.

Upper Clear Creek Mitigation Bank — Public comment period
Sept. 25, 2026

The Port of Tacoma is proposing to amend the Mitigation Banking Instrument for the Upper Clear Creek Mitigation Bank site located within Pierce County.

241-S Tank Farm Exhausters — Notice of Construction Approval Order DE26NWP-001
Sept. 25, 2026

We are holding a 30-day public comment period on draft Approval Order DE26NWP-001, which would authorize use of three new portable exhausters in the 241-S Single Shell Tank (SST) Farm.

Single-shell tank exhausters — NOC Approval Order - DE05NWP-002, Revision 4
Sept. 25, 2026

We are holding a 30-day public comment period under WAC 173-400-171 (3)(n) for a Notice of Construction (NOC) Application which has been determined to be of significant public interest.

Public Notice of Water Quality Permit Renewal Application — Northwest Alloys Inc., Addy
Sept. 30, 2026

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
Sept. 30, 2026

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
Sept. 30, 2026

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

Public comment period — Battery Energy Storage Systems Scoping Document available for review
Oct. 1, 2026

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
Oct. 1, 2026

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
Oct. 2, 2026

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

Marine Spill Response Corporation — Primary Response Contractor Application
Oct. 12, 2026

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

Draft National Pollutant Discharge Elimination System permit, fact sheet, and Water Quality Agreed Order — HF Sinclair Puget Sound Refinery
Oct. 14, 2026

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.

Water Resources Program guidance and policy — Determining irrigation efficiency
Oct. 26, 2026

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
Oct. 27, 2026

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
Nov. 2, 2026

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

Open comment periods:
Closing date:
Maritime Fire and Safety Association (MFSA) — Oil Spill Contingency Plan
Sept. 18, 2026

Ecology invites interested members of the public, local, and tribal governments to review and comment on required 5-year updates to industry-written oil spill contingency plans.

Public input survey — Washington's Water Future
Sept. 18, 2026

One way to engage in the Washington's Water Future initiative is to take the online survey between July 8 – Aug. 31, 2026.

Draft toolkit comment period — Clean energy environmental justice guidance
Sept. 18, 2026

We invite you to provide feedback on a Draft Environmental Justice Toolkit for Clean Energy projects through Sept. 18.

Maxum Petroleum Class 2 — Equivalent Compliance Plan
Sept. 19, 2026

Delivering facilities may submit an equivalent compliance plan to meet the alternative measures required in WAC 173-180-221(9) and 173-180-222(2). The Plan’s objective is to provide an equivalent or greater level of environmental protection as the applicable alternative measures in the rule.

Leavenworth National Fish Hatchery — 401 certification
Sept. 19, 2026

We are seeking feedback on water quality conditions we should consider to ensure Federal Aquaculture Facilities, including the Leavenworth National Fish Hatchery, meet state standards.

Amazon IWA6, Pasco — Air quality notice of construction application – Opportunity to request a public comment period
Sept. 20, 2026

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

Midway Sewer District Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 21, 2026

We invite your comments on the development of the Midway Sewer District Wastewater Treatment Plant draft permit no. WA0020958.

Sudbury Road Landfill, Walla Walla — Air quality notice of construction application
Sept. 21, 2026

We propose to approve Sudbury Road Landfill's air quality notice of construction (NOC) application.

Norm Nelson Inc. Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 23, 2026

We invite you to comment on draft National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit No. WA0991004.

Tru-Grit Abrasives Inc. cleanup, Tacoma — Interim action plan, public participation plan, and SEPA determination of non-significance
Sept. 24, 2026

We invite you to review and comment on a plan for a partial cleanup at this contaminated site, and related documents.

Upper Clear Creek Mitigation Bank — Public comment period
Sept. 25, 2026

The Port of Tacoma is proposing to amend the Mitigation Banking Instrument for the Upper Clear Creek Mitigation Bank site located within Pierce County.

241-S Tank Farm Exhausters — Notice of Construction Approval Order DE26NWP-001
Sept. 25, 2026

We are holding a 30-day public comment period on draft Approval Order DE26NWP-001, which would authorize use of three new portable exhausters in the 241-S Single Shell Tank (SST) Farm.

Single-shell tank exhausters — NOC Approval Order - DE05NWP-002, Revision 4
Sept. 25, 2026

We are holding a 30-day public comment period under WAC 173-400-171 (3)(n) for a Notice of Construction (NOC) Application which has been determined to be of significant public interest.

Public Notice of Water Quality Permit Renewal Application — Northwest Alloys Inc., Addy
Sept. 30, 2026

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
Sept. 30, 2026

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
Sept. 30, 2026

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

Public comment period — Battery Energy Storage Systems Scoping Document available for review
Oct. 1, 2026

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
Oct. 1, 2026

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
Oct. 2, 2026

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

Marine Spill Response Corporation — Primary Response Contractor Application
Oct. 12, 2026

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

Draft National Pollutant Discharge Elimination System permit, fact sheet, and Water Quality Agreed Order — HF Sinclair Puget Sound Refinery
Oct. 14, 2026

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.

Water Resources Program guidance and policy — Determining irrigation efficiency
Oct. 26, 2026

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
Oct. 27, 2026

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
Nov. 2, 2026

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

Open comment periods:
Closing date:
Maritime Fire and Safety Association (MFSA) — Oil Spill Contingency Plan
Sept. 18, 2026

Ecology invites interested members of the public, local, and tribal governments to review and comment on required 5-year updates to industry-written oil spill contingency plans.

Public input survey — Washington's Water Future
Sept. 18, 2026

One way to engage in the Washington's Water Future initiative is to take the online survey between July 8 – Aug. 31, 2026.

Draft toolkit comment period — Clean energy environmental justice guidance
Sept. 18, 2026

We invite you to provide feedback on a Draft Environmental Justice Toolkit for Clean Energy projects through Sept. 18.

Maxum Petroleum Class 2 — Equivalent Compliance Plan
Sept. 19, 2026

Delivering facilities may submit an equivalent compliance plan to meet the alternative measures required in WAC 173-180-221(9) and 173-180-222(2). The Plan’s objective is to provide an equivalent or greater level of environmental protection as the applicable alternative measures in the rule.

Leavenworth National Fish Hatchery — 401 certification
Sept. 19, 2026

We are seeking feedback on water quality conditions we should consider to ensure Federal Aquaculture Facilities, including the Leavenworth National Fish Hatchery, meet state standards.

Amazon IWA6, Pasco — Air quality notice of construction application – Opportunity to request a public comment period
Sept. 20, 2026

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

Midway Sewer District Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 21, 2026

We invite your comments on the development of the Midway Sewer District Wastewater Treatment Plant draft permit no. WA0020958.

Sudbury Road Landfill, Walla Walla — Air quality notice of construction application
Sept. 21, 2026

We propose to approve Sudbury Road Landfill's air quality notice of construction (NOC) application.

Norm Nelson Inc. Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 23, 2026

We invite you to comment on draft National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit No. WA0991004.

Tru-Grit Abrasives Inc. cleanup, Tacoma — Interim action plan, public participation plan, and SEPA determination of non-significance
Sept. 24, 2026

We invite you to review and comment on a plan for a partial cleanup at this contaminated site, and related documents.

Upper Clear Creek Mitigation Bank — Public comment period
Sept. 25, 2026

The Port of Tacoma is proposing to amend the Mitigation Banking Instrument for the Upper Clear Creek Mitigation Bank site located within Pierce County.

241-S Tank Farm Exhausters — Notice of Construction Approval Order DE26NWP-001
Sept. 25, 2026

We are holding a 30-day public comment period on draft Approval Order DE26NWP-001, which would authorize use of three new portable exhausters in the 241-S Single Shell Tank (SST) Farm.

Single-shell tank exhausters — NOC Approval Order - DE05NWP-002, Revision 4
Sept. 25, 2026

We are holding a 30-day public comment period under WAC 173-400-171 (3)(n) for a Notice of Construction (NOC) Application which has been determined to be of significant public interest.

Public Notice of Water Quality Permit Renewal Application — Northwest Alloys Inc., Addy
Sept. 30, 2026

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
Sept. 30, 2026

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
Sept. 30, 2026

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

Public comment period — Battery Energy Storage Systems Scoping Document available for review
Oct. 1, 2026

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
Oct. 1, 2026

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
Oct. 2, 2026

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

Marine Spill Response Corporation — Primary Response Contractor Application
Oct. 12, 2026

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

Draft National Pollutant Discharge Elimination System permit, fact sheet, and Water Quality Agreed Order — HF Sinclair Puget Sound Refinery
Oct. 14, 2026

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.

Water Resources Program guidance and policy — Determining irrigation efficiency
Oct. 26, 2026

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
Oct. 27, 2026

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
Nov. 2, 2026

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

Open comment periods:
Closing date:
Maxum Petroleum Class 2 — Equivalent Compliance Plan
Sept. 19, 2026

Delivering facilities may submit an equivalent compliance plan to meet the alternative measures required in WAC 173-180-221(9) and 173-180-222(2). The Plan’s objective is to provide an equivalent or greater level of environmental protection as the applicable alternative measures in the rule.

Leavenworth National Fish Hatchery — 401 certification
Sept. 19, 2026

We are seeking feedback on water quality conditions we should consider to ensure Federal Aquaculture Facilities, including the Leavenworth National Fish Hatchery, meet state standards.

Amazon IWA6, Pasco — Air quality notice of construction application – Opportunity to request a public comment period
Sept. 20, 2026

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

Midway Sewer District Wastewater Treatment Plant — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 21, 2026

We invite your comments on the development of the Midway Sewer District Wastewater Treatment Plant draft permit no. WA0020958.

Sudbury Road Landfill, Walla Walla — Air quality notice of construction application
Sept. 21, 2026

We propose to approve Sudbury Road Landfill's air quality notice of construction (NOC) application.

Norm Nelson Inc. Draft Permit — National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit
Sept. 23, 2026

We invite you to comment on draft National Pollutant Discharge Elimination System (NPDES) Wastewater Discharge Permit No. WA0991004.

Tru-Grit Abrasives Inc. cleanup, Tacoma — Interim action plan, public participation plan, and SEPA determination of non-significance
Sept. 24, 2026

We invite you to review and comment on a plan for a partial cleanup at this contaminated site, and related documents.

Upper Clear Creek Mitigation Bank — Public comment period
Sept. 25, 2026

The Port of Tacoma is proposing to amend the Mitigation Banking Instrument for the Upper Clear Creek Mitigation Bank site located within Pierce County.

241-S Tank Farm Exhausters — Notice of Construction Approval Order DE26NWP-001
Sept. 25, 2026

We are holding a 30-day public comment period on draft Approval Order DE26NWP-001, which would authorize use of three new portable exhausters in the 241-S Single Shell Tank (SST) Farm.

Single-shell tank exhausters — NOC Approval Order - DE05NWP-002, Revision 4
Sept. 25, 2026

We are holding a 30-day public comment period under WAC 173-400-171 (3)(n) for a Notice of Construction (NOC) Application which has been determined to be of significant public interest.

Public Notice of Water Quality Permit Renewal Application — Northwest Alloys Inc., Addy
Sept. 30, 2026

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
Sept. 30, 2026

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
Sept. 30, 2026

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

Public comment period — Battery Energy Storage Systems Scoping Document available for review
Oct. 1, 2026

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
Oct. 1, 2026

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
Oct. 2, 2026

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

Marine Spill Response Corporation — Primary Response Contractor Application
Oct. 12, 2026

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

Draft National Pollutant Discharge Elimination System permit, fact sheet, and Water Quality Agreed Order — HF Sinclair Puget Sound Refinery
Oct. 14, 2026

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.

Water Resources Program guidance and policy — Determining irrigation efficiency
Oct. 26, 2026

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
Oct. 27, 2026

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
Nov. 2, 2026

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