Search Results - Washington State Department of Ecology

Plate 1 - Location and hydrogeologic unit (WAC 173-557; 173-555) 01/27/15

Plate 1 - Location and hydrogeologic unit of project wells in the Spokane Valley–Rathdrum Prairie aquifer study area WAC 173-557; 173-555 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer and amendment to WAC 173-555-010.

https://ecology.wa.gov/plate-1-location-and-hydrogeologic-unit-wac-173

Plate 2 - Map and hydrogeologic sections (WAC 173-557; 173-555) 01/27/15

• Plate 2 - Map and hydrogeologic sections showing location of wells, surficial geology, and hydrogeologic units WAC 173-557; 173-555 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer and amendment to WAC 173-555-010.

https://ecology.wa.gov/plate-2-map-and-hydrogeologic-sections-wac-173

Bothell shoreline master program: locally initiated amendment

We are seeking public comment on Bothell's proposed shoreline master program amendment.

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

Sullivan Lake water rights

Our Sullivan Lake program makes new water rights available in northeastern counties.

https://ecology.wa.gov/ecologys-work-near-you/river-basins-groundwater/columbia-river-basin-projects/lake-sullivan-water-rights

Odessa groundwater replacement

We're delivering surface water to irrigators who now pump from the declining Odessa Subarea aquifer.

https://ecology.wa.gov/ecologys-work-near-you/river-basins-groundwater/columbia-river-basin-projects/odessa-groundwater-replacement

Eastern Region

https://ecology.wa.gov/ecologys-work-near-you/regional-work/eastern-region

Environmental Assessment

Our Environmental Assessment Program is the science arm of our agency.

https://ecology.wa.gov/about-us/who-we-are/our-programs/environmental-assessment

PFAS contamination at Joint Base Lewis McChord and surrounding communities

Ecology monitors multiple cleanup sites at Joint Base Lewis-McChord. This page focuses on PFAS contamination in the groundwater.

https://ecology.wa.gov/spills-cleanup/contamination-cleanup/cleanup-sites/sites-with-pfas-in-drinking-water/joint-base-lewis-mcchord

Southwest Region

https://ecology.wa.gov/ecologys-work-near-you/regional-work/southwest-region

Aquifer storage, recovery, & recharge

Artificially recharging groundwater can increase groundwater supplies and benefit surface water.

https://ecology.wa.gov/water-shorelines/water-supply/water-recovery-solutions/aquifer-storage-recovery-recharge

Region office contacts

Contact information for our region offices.

https://ecology.wa.gov/about-us/contact-us/region-contacts

Everett baywide cleanup and restoration (Port Gardner Bay)

The Puget Sound Initiative is making Everett’s waterfront a healthier place to live, work, and play.

https://ecology.wa.gov/spills-cleanup/contamination-cleanup/cleanup-sites/puget-sound/everett-area-baywide

How the cleanup process works

Cleaning up contamination protects human health and the environment. In Washington

https://ecology.wa.gov/spills-cleanup/contamination-cleanup/cleanup-process

Hanford leaking tanks

Our agency and Energy have reached an agreement on responding to leaking tanks at the Hanford Site.

https://ecology.wa.gov/waste-toxics/nuclear-waste/hanford-cleanup/leaking-tanks

Custer Crude Oil Derailment 2020

An oil train derailment in Custer, WA Dec. 22, 2020.

https://ecology.wa.gov/spills-cleanup/spills/spill-preparedness-response/responding-to-spill-incidents/spill-incidents/custer-crude-oil-derailment-2020

Puget Sound Energy Crystal Mountain spill

https://ecology.wa.gov/spills-cleanup/spills/spill-preparedness-response/responding-to-spill-incidents/spill-incidents/pse-crystal-mountain-spill

Orcas Island spill

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

The Dalles Dam transformer leak

https://ecology.wa.gov/spills-cleanup/spills/spill-preparedness-response/responding-to-spill-incidents/spill-incidents/dalles-dam-transformer-leak

Whitley fire and petroleum spill

https://ecology.wa.gov/spills-cleanup/spills/spill-preparedness-response/responding-to-spill-incidents/spill-incidents/whitley-fire-and-petroleum-spill

Frederickson Industrial Park, Puyallup

Comment Period: April 17, 2025, 8 a.m. - May 16, 2025, 11:59 p.m.
We review conditions at sites where some contamination remains about every five years, to make sure the cleanup is still effective.

https://ecology.wa.gov/events/tcp/site-periodic-reviews/frederickson-industrial-park

Olympic Pipeline gasoline spill near Conway

Ecology and partners respond to the Olympic Pipeline gasoline spill near Conway.

https://ecology.wa.gov/spills-cleanup/spills/spill-preparedness-response/responding-to-spill-incidents/spill-incidents/olympic-pipeline-gasoline-spill-mt-vernon

Chapter 173-501 WAC

On May 27, 2020, Ecology adopted amendments to Chapter 173-501 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-501

Chapter 173-408 WAC – Landfill Methane Emissions

This is the rulemaking page for Chapter 173-408 WAC.

https://ecology.wa.gov/regulations-permits/laws-rules-rulemaking/closed-rulemaking/wac-173-408