Research & Data

Use this portal to filter and search for all of our scientific information.

Ecology provides the high-quality science that is the foundation of Washington state environmental policy. Our monitoring, assessment, and modeling services provide a data-rich understanding of our state’s land, air, and water. We provide access to that data through reports, databases, maps and user-friendly online tools.

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Sprague Lake Community Mtg

Sprague Lake Hydrology Analysis Community Kick-Off Meeting November 22, 2022

https://ecology.wa.gov/sprague-lake

Air Quality data for Intalco Storymap

A table showing the number of days in each Air Quality Index category near Intalco

https://ecology.wa.gov/20200414-intalcostorymap

EPA approval letter

Approval of Washington’s 2014-2018 Section 303(d) List

https://ecology.wa.gov/20220826-final-wa-2014-2018-303dlist-transmittal

Public review draft - Policy 1-11 Chapter 1 Harmful Algae Blooms Methodology

Draft shows proposed revisions. Public comment period November 2022 through Jan. 6, 2023. One of 2 documents with draft revisions.

https://ecology.wa.gov/2022-policy-1-11-chapter-1-hab-methodology-draft-r

Public review draft - Policy 1-11 Chapter 1 non-substantial updates

Draft shows revisions with track changes. Public comment period November 2022 through Jan. 6, 2023. One of 2 documents with draft revisions.

https://ecology.wa.gov/2022-policy-1-11-chapter-1-non-substantial-updates

Ecology comments to EPA on proposed ozone NAAQS standard

Comments submitted to EPA on the agency's proposed ozone standards.

https://ecology.wa.gov/20200929-ecology-ozone-naaqs-comments

Washington 2018 Greenhouse Gas Contributors by Percent

Pie chart showing 2018 Washington greenhouse gas contributors by percent

https://ecology.wa.gov/20201228-ghgpiechart-2018-alt

Tracking Washington Greenhouse Gases

Chart showing past emissions and future greenhouse gas limits set by the Legislature.

https://ecology.wa.gov/20201221-ghg-actual-projections_alt

Washington Total Annual Emissions

bar chart shoring Washington greenhouse gases the past decade

https://ecology.wa.gov/2011-2018_ghg-barchart-alt

Clean Watershed Needs Survey - Calendar year 2018 Overview

This document provides an overview of the calendar year 2018 cycle of the Clean Watershed Needs Survey process for reviewing state watersheds to make a list of their water issues and needs

https://ecology.wa.gov/cwns-cy2018-overview

Biosolids facilities list 2025

This is Ecology's official list of biosolids facilities in Washington.

https://ecology.wa.gov/biosolids-facilities-list-a5a06e95e96db8d865eedf1f5db8a461

Air Quality Index (AQI)

The Air Quality Index (AQI) tells you when air quality is healthy or unhealthy.

https://ecology.wa.gov/research-data/monitoring-assessment/air-quality-index

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

River and stream flow monitoring

We report the amount of water flowing through Washington’s rivers and streams using graphs and maps.

https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/flow-monitoring

Measuring bluff erosion in Clallam County

We collected data about bluff-backed Dungeness and Elwha beaches to measure erosion.

https://ecology.wa.gov/research-data/monitoring-assessment/coastal-monitoring-analysis/clallam-county-bluffs

Puget Sound feeder bluffs

Protecting the cliffs that feed Puget Sound beaches with sand and the beaches that depend on them.

https://ecology.wa.gov/research-data/monitoring-assessment/coastal-monitoring-analysis/puget-sound-feeder-bluff

Shoalwater Bay berm monitoring

We monitored the Willapa Bay shoreline to assess how a flood-protection berm changed over time.

https://ecology.wa.gov/research-data/monitoring-assessment/coastal-monitoring-analysis/shoalwater-bay-berm-monitoring

Aladdin Plating

We monitor groundwater for legacy plating chemicals at the former Aladdin Plating Co. site in Tacoma.

https://ecology.wa.gov/research-data/monitoring-assessment/groundwater-quality-assessment/active-studies-index/aladdin-plating

Watershed Health - Statewide Report

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https://ecology.wa.gov/research-data/monitoring-assessment/river-stream-monitoring/habitat-monitoring/watershed-health/statewide-report

Lower Snohomish River Tributaries effectiveness monitoring

We studied bacterial 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