Search Results - Washington State Department of Ecology

The TMDL process cleans up polluted water so it meets state water quality standards.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/total-maximum-daily-load-process

Online tool: Water Quality Assessment (303(d)/305(b) list)

Look up water quality assessments by listing details, status, location, TMDL project or EIM identifier.

https://apps.ecology.wa.gov/ApprovedWQA/ApprovedPages/ApprovedSearch.aspx

Working to reduce temperature in the Columbia and Lower Snake Rivers to protect salmon.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/total-maximum-daily-load-process/directory-of-improvement-projects/columbia-snake-river-tmdl

Modeling the environment

Computer models mathematically represent part of the environment to predict potential changes.

https://ecology.wa.gov/research-data/data-resources/models-spreadsheets/modeling-the-environment

Spokane River multi-parameter TMDL

We work with partners to increase oxygen and reduce metals and PCBs in the Spokane River.

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

Lower Snohomish River Tributaries effectiveness monitoring

We're studying bacteria pollution in tributaries to the Lower Snohomish River.

https://ecology.wa.gov/research-data/monitoring-assessment/water-quality-improvement-effectiveness-monitoring/lower-snohomish-river-tributaries

Effectiveness monitoring for water quality

Our scientists study the effectiveness of projects to protect and improve water quality.

https://ecology.wa.gov/research-data/monitoring-assessment/water-quality-improvement-effectiveness-monitoring

Henderson Inlet effectiveness monitoring

Our monitoring work in Henderson Inlet shows how local projects reduced fecal coliform in water.

https://ecology.wa.gov/research-data/monitoring-assessment/water-quality-improvement-effectiveness-monitoring/henderson-inlet

Palouse River

We are working with many partners to improve water quality in the Palouse River.

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

Models & spreadsheets

Computer models predict changes and spreadsheets calculate. We offer these tools to the public.

https://ecology.wa.gov/research-data/data-resources/models-spreadsheets

Clean Water Act: Section 401 Water Quality Certifications

Under the Clean Water Act, we help make sure projects, actions, and activities don't harm state waters.

https://ecology.wa.gov/regulations-permits/permits-certifications/401-water-quality-certification

Drayton Harbor Bacteria TMDL

We are working in Drayton Harbor 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/drayton-harbor

Industrial Stormwater General Permit

Find information and helpful resources about the Industrial Stormwater General Permit.

https://ecology.wa.gov/regulations-permits/permits-certifications/stormwater-general-permits/industrial-stormwater-permit

Water Quality improvement projects

See where we are working with partners across the state to improve water quality.

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

Models and tools for water quality improvement

We use models to predict water quality changes to help find strategies to address pollution.

https://ecology.wa.gov/research-data/data-resources/models-spreadsheets/modeling-the-environment/models-tools-for-tmdls

Lake Whatcom multi-parameter TMDL

We are working with Bellingham and Whatcom County to improve Lake Whatcom's water quality.

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

Middle Yakima River Basin Bacteria TMDL

We are working to control fecal coliform bacteria in tributaries of the Middle Yakima River basin.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/total-maximum-daily-load-process/directory-of-improvement-projects/mid-yakima-basin-bacteria-tmdl

Padilla Bay tributaries bacteria TMDL

We are working in Padilla Bay 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/padilla-bay-fc-tmdl

Salish Sea Model

We use a computer tool that simulates hydrodynamic and water quality processes in the Salish Sea.

https://ecology.wa.gov/research-data/data-resources/models-spreadsheets/modeling-the-environment/salish-sea-modeling

Washington Department of Transportation Municipal Stormwater Permit

Permit covers discharges from state highways and other WSDOT transportation-related facilities.

https://ecology.wa.gov/regulations-permits/permits-certifications/stormwater-general-permits/municipal-stormwater-general-permits/wsdot-municipal-stormwater-permit

Sonoco Paper Mill

We regulate water and hazardous waste activities at Sonoco Products Company in Sumner.

https://ecology.wa.gov/regulations-permits/permits-certifications/industrial-facilities-permits/sonoco

GIS Data

Ecology's authoritative GIS data layers are available for download.

https://ecology.wa.gov/research-data/data-resources/geographic-information-systems-gis/data

Construction Stormwater General Permit eCoverage Packet

The Construction Stormwater General Permit is switching from paper copies to an electronic packet.

https://ecology.wa.gov/regulations-permits/permits-certifications/stormwater-general-permits/construction-stormwater-permit/ecoverage-packet

GIS Applications

Find a list of GIS applications at Ecology.

https://ecology.wa.gov/research-data/data-resources/geographic-information-systems-gis/applications

Guidance for contaminated water on construction sites

Information on how to manage contaminated water on construction sites.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/stormwater-permittee-guidance-resources/contaminated-water-on-construction-sites

Acronyms & glossary for the Toxics Cleanup Program

We have a list of acronyms and terms commonly used in contaminated site cleanup work.

https://ecology.wa.gov/regulations-permits/guidance-technical-assistance/toxic-cleanup-acronyms

Deschutes River, Percival Creek, & Budd Inlet tributaries

We are working with partners to restore water quality in tributaries to the Deschutes River.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/total-maximum-daily-load-process/directory-of-improvement-projects/deschutes-river-and-tributaries

Budd Inlet Dissolved Oxygen TMDL

We are working with partners to address water quality impairments in Budd Inlet.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/total-maximum-daily-load-process/directory-of-improvement-projects/deschutes-river-watershed-area-budd-inlet

Little Spokane River

We're working in partnership to improve water quality in the Little Spokane River.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/total-maximum-daily-load-process/directory-of-improvement-projects/little-spokane-river-do-and-ph-tmdl

Puyallup River basin TMDLs

We work with partners in the Puyallup River Basin to improve water quality for people and fish.

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

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

Sammamish River temperature & dissolved oxygen TMDL

We are studying the Sammamish River watershed to determine how to improve its water quality.

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

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

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

Green-Duwamish watershed pollutant loading assessment

We work with stakeholders to assess water pollution in the Green-Duwamish watershed.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/total-maximum-daily-load-process/directory-of-improvement-projects/green-duwamish-watershed-pla

South Skagit Bay assessment

We are working with partners in the Samish and Padilla Bay watersheds to improve water quality.

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

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

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

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

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

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

Water quality improvement

We protect Washington waters from pollution so they meet state water quality standards.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement

Planning for better water quality in Budd Inlet

June 8, 2022 News release: A new report from Ecology details the steps needed to protect Budd Inlet and provide relief to fish and wildlife, while also helping the inlet to meet state water quality standards.

https://ecology.wa.gov/about-us/who-we-are/news/2022/june-8-budd-inlet-water-quality-plan

Report outlines plan to reduce bacteria levels in Yakima-area creeks

October 13, 2020 News release: Strategies to address fecal bacteria in Cowiche Creek, Wide Hollow Creek and the Moxee Drain watersheds are outlined in a draft technical report that’s now available for review and comment.

https://ecology.wa.gov/about-us/who-we-are/news/2020/oct-13-mid-yakima-bacteria-tmdl

EPA approves Lower White River water cleanup plan

March 2, 2023 News release: Ecology recently received approval from the U.S. Environmental Protection Agency for a water quality cleanup plan for the Lower White River.

https://ecology.wa.gov/about-us/who-we-are/news/2023/march-2-epa-approves-lower-white-river-tmdl

EPA approves Budd Inlet water cleanup plan

January 10, 2023 News release: Last month, the Washington Department of Ecology received approval from the U.S. Environmental Protection Agency for its water quality cleanup plan for Budd Inlet.

https://ecology.wa.gov/about-us/who-we-are/news/2023/jan-10-epa-approves-budd-inlet-tmdl

Water Quality Assessment & 303(d) List

We assess water data to understand how clean the rivers, lakes, and marine waters are in the state.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/assessment-of-state-waters-303d

Straight to implementation

We use a process called straight to implementation as a tool to improve water quality.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/straight-to-implementation

Water quality assessment Policy 1-11

Water quality policy 1-11 guides how we make decisions to list waters as polluted.

https://ecology.wa.gov/water-shorelines/water-quality/water-improvement/assessment-of-state-waters-303d/assessment-policy-1-11