Search Results - Washington State Department of Ecology

Overview SEPA Draft Environmental Impact Statement for the Proposed Chehalis River Basin Flood Damage Reduction Project

This focus sheet describes the environmental review process and the public comment period with an overview of the applicant's proposed project.

https://ecology.wa.gov/chehalisdeis-focussheet-english

Chehalis draft EIS - Summary of the proposed Chehalis River Basin Flood Damage Reduction Project

Nineteen-page summary of the project proposal and the environmental review process.

https://ecology.wa.gov/chehalisdeis-summary

Whatcom Creek bacteria TMDL

We are working in Whatcom Creek to improve water quality for people and aquatic life.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/total-maximum-daily-load-process/directory-of-improvement-projects/whatcom-creek

Thurston County Shoreline Master Program: Comprehensive Update & Periodic Review

The public comment period for Thurston County's proposed update to its SMP is closed.

https://ecology.wa.gov/water-shorelines/shoreline-coastal-management/shoreline-coastal-planning/state-approved-shoreline-master-programs/thurston-county

East Fork Lewis River Alternative Restoration Plan

Working with local governments and stakeholders to restore a clean, cool East Fork Lewis River.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/total-maximum-daily-load-process/directory-of-improvement-projects/east-fork-lewis-river

The Nooksack and Sumas Transboundary Flood Initiative

The Transboundary Flood Initiative is a collaborative effort to reduce flood risk & restore habitats

https://ecology.wa.gov/ecologys-work-near-you/environmental-projects/nooksack-transboundary-flood-initiative

Planning for flood hazards

Learn about climate change flooding hazards and our response.

https://ecology.wa.gov/air-climate/responding-to-climate-change/flood-impacts

Lake Chelan coordinated cost reimbursement program

We partnered with Chelan County to initiate a Lake Chelan Coordinated Cost Reimbursement Program.

https://ecology.wa.gov/water-shorelines/water-supply/water-rights/cost-reimbursement/lake-chelan-ccr

Water supply monitoring

Explore some of the data sources we use to monitor the state's water supply.

https://ecology.wa.gov/water-shorelines/water-supply/water-availability/statewide-conditions/water-supply-monitoring

Toxic chemicals in juvenile Chinook salmon

Scientists study flame retardants in Snohomish River fish to help salmon and orcas.

https://ecology.wa.gov/waste-toxics/reducing-toxic-chemicals/toxics-studies/source-assessments/toxic-chemicals-in-chinook-salmon

Shoreline natural hazards management

We work to minimize the impacts of natural hazards to communities and natural resources.

https://ecology.wa.gov/water-shorelines/shoreline-coastal-management/hazards

Henderson Inlet multi-parameter TMDL

We are working in Henderson Inlet to restore impaired water quality to meet state standards.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/total-maximum-daily-load-process/directory-of-improvement-projects/henderson-inlet-multi-parameter

Soos Creek watershed multi-parameter TMDL

We are working with partners in the Soos Creek watershed to improve water quality.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/total-maximum-daily-load-process/directory-of-improvement-projects/soos-creek-multi-parameter-tmdl

Hangman Creek multi-parameter TMDL

We're working to improve water quality in Hangman Creek.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/total-maximum-daily-load-process/directory-of-improvement-projects/hangman-creek

Fidalgo & Padilla baywide cleanups, Anacortes

Fidalgo and Padilla Bay – learn about these priority bay shoreline and sediment cleanups.

https://ecology.wa.gov/spills-cleanup/contamination-cleanup/cleanup-sites/puget-sound/fidalgo-padilla-baywide

Toxic chemicals in Puget Sound

Toxic chemicals used in everyday activities can harm human health and the environment.

https://ecology.wa.gov/water-shorelines/puget-sound/issues-problems/toxic-chemicals

French and Pilchuck watersheds

We are working in the French and Pilchuck watersheds to improve water quality for aquatic life.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/total-maximum-daily-load-process/directory-of-improvement-projects/french-creek-pilchuck-watersheds

Soos Creek watershed fine sediment TMDL

We are working with partners in the Soos Creek basin to address fine sediment impairments.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/total-maximum-daily-load-process/directory-of-improvement-projects/soos-creek-watershed-fine-sediment-tmdl

South Fork Nooksack temperature TMDL

We work with partners to improve the water quality of the South Fork Nooksack River.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/total-maximum-daily-load-process/directory-of-improvement-projects/south-fork-nooksack

Watershed planning

We support watershed planning to improve streamflows under the Streamflow Restoration Act.

https://ecology.wa.gov/water-shorelines/water-supply/improving-streamflows/watershed-planning

Lower Yakima Valley Groundwater Management Area

We're partnering in a local effort to reduce nitrate concentrations in Lower Yakima Valley wells.

https://ecology.wa.gov/ecologys-work-near-you/environmental-projects/lower-yakima-valley-groundwater-management-area

Water banking grants

Water bank grant awards will fund water right purchases for ready-to-go water banking projects.

https://ecology.wa.gov/water-shorelines/water-supply/water-rights/water-banks/water-banking-grants

Zosel Dam

Zosel Dam, which maintains water levels on Osoyoos Lake, is the only dam we own and operate.

https://ecology.wa.gov/water-shorelines/water-supply/dams/info-for-the-public/dams-we-regulate/zosel-dam

Public involvement

We provide information and supporting documents for public comment periods about cleanup at Hanford.

https://ecology.wa.gov/waste-toxics/nuclear-waste/public-involvement

Latest videos, resources & tools - Nooksack adjudication

We are preparing to file a general stream adjudication in WRIA 1.

https://ecology.wa.gov/water-shorelines/water-supply/water-rights/adjudications/nooksack/whats-happening

Site history

We're cleaning up decades of industrial contamination in the Lower Duwamish Waterway.

https://ecology.wa.gov/spills-cleanup/contamination-cleanup/cleanup-sites/lower-duwamish-waterway/site-history

Floodplains by Design

Floodplains by Design grant program helps reduce flood risks, restore river floodplains.

https://ecology.wa.gov/water-shorelines/shoreline-coastal-management/hazards/floods-floodplain-planning/floodplains-by-design

Agricultural burning & permitting

Get an agricultural burn permit before burning safely and legally.

https://ecology.wa.gov/air-climate/air-quality/smoke-fire/agricultural-burning

Puget Sound Watershed Characterization Project

A regional planning tool that identifies areas of the Puget Sound to protect, restore, or develop.

https://ecology.wa.gov/water-shorelines/puget-sound/watershed-characterization-project

Watershed plan archive

We are providing an archive of documents related to the Watershed Planning Act.

https://ecology.wa.gov/water-shorelines/water-supply/improving-streamflows/watershed-plan-archive

Find a moderate risk waste disposal site

Find a moderate risk waste site in your county.

https://ecology.wa.gov/waste-toxics/community-waste-toxics/household-hazardous-waste-mrw/find-a-household-hazardous-waste-site

Statewide conditions

We work with agencies and organizations to closely monitor Washington’s water supply.

https://ecology.wa.gov/water-shorelines/water-supply/water-availability/statewide-conditions

Reporting & notification requirements

Get answers to common questions about reporting requirements of the municipal stormwater permits.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/stormwater-permittee-guidance-resources/municipal-stormwater-permit-guidance/reporting

Stormwater management program components

Get answers to common questions about implementing municipal stormwater permits.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/stormwater-permittee-guidance-resources/municipal-stormwater-permit-guidance/stormwater-management-program

Yakima Basin integrated planning grants

Funding for water management projects in the Yakima River Basin

https://ecology.wa.gov/about-us/payments-contracts-grants/grants-loans/find-a-grant-or-loan/yakima-basin-integrated-planning-grant

Columbia River Basin water management grant

Columbia Basin Water Management Grants fund water supply projects in Eastern Washington.

https://ecology.wa.gov/about-us/payments-contracts-grants/grants-loans/find-a-grant-or-loan/columbia-river-basin-water-management-gran

Oil spill cleanup and wildlife assistance at Auburn Pond

Oil spill at a privately owned stormwater retention pond in Auburn.

https://ecology.wa.gov/spills-cleanup/spills/spill-preparedness-response/responding-to-spill-incidents/spill-incidents/auburn-pond-oil-spill

Oil spill on SR-520

https://ecology.wa.gov/spills-cleanup/spills/spill-preparedness-response/responding-to-spill-incidents/spill-incidents/sr-520-spill

Luzon Strait Loss of propulsion incident

https://ecology.wa.gov/spills-cleanup/spills/spill-preparedness-response/responding-to-spill-incidents/spill-incidents/luzon-strait-loss-of-propulsion-incident

Water banking pilot grants

Water banking grant awards will help preserve water rights in basin for local use and streamflows.

https://ecology.wa.gov/about-us/payments-contracts-grants/grants-loans/find-a-grant-or-loan/water-bank-grants

Shelter Bay Marina fire and spill

https://ecology.wa.gov/spills-cleanup/spills/spill-preparedness-response/responding-to-spill-incidents/spill-incidents/shelter-bay-marina-fire-spill

Minnie Creek diesel spill

Ecology and partners respond to the Minnie Creek diesel spill

https://ecology.wa.gov/spills-cleanup/spills/spill-preparedness-response/responding-to-spill-incidents/spill-incidents/minnie-creek-diesel-spill

Duwamish Waterway jet fuel spill

https://ecology.wa.gov/spills-cleanup/spills/spill-preparedness-response/responding-to-spill-incidents/spill-incidents/duwamish-waterway-jet-fuel-spill

Chapter 173-135 WAC: Pasco Basin Groundwater Subarea

This is the rulemaking page for Chapter 173-135 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/rulemaking/wac-173-135

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

On April 8, 2025, Ecology adopted amendments to Chapter 173-167 WAC Emergency Drought Funding

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

Chapter 173-503A WAC

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

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-503a-feb15