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.
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
Frequently Asked Questions: Policy 1-11 Bacteria Criteria Revision
Frequently asked questions about the bacteria criteria revisions to water quality Policy 1-11
https://ecology.wa.gov/frequently-asked-questions-policy-1-11-bacteria-cr
Policy 1-11 Easy-To-Read Bacteria Criteria Revisions
Easy to read version of water quality Policy 1-11 proposed bacteria criteria revisions for public comment
https://ecology.wa.gov/policy-1-11-draft-bacteria-criteria-revisions
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
MNA Plain Text
Monitored natural attenuation (MNA) process at the Boeing Auburn site
https://ecology.wa.gov/mna-plaintext
Ecology Water Quality Funded Aquatic Invasive Plants Grant Project Offer List for Fiscal Year 2020
List of applicants who were offered grants/loan through Ecology's Water Quality Funded Aquatic Invasive Plants Grant Project for Fiscal Year 2020
https://ecology.wa.gov/fy2020-aquatic-invasive-plant
Soos Creek SAP Appendix 1: 7-DADMAX thermal record graphs
7-DADMAX thermal record graphs for Soos Creek Watershed Temperature and DO TMDL Study and Analysis Plan, Appendix 1
https://ecology.wa.gov/soos-creek-sap-appendix-1-7-dadmax-thermal-record
Ecology Water Quality Funded Aquatic Invasive Plants Grant Project Offer List for Fiscal Year 2021
List of applicants who were offered grants/loan through Ecology's Water Quality Funded Aquatic Invasive Plants Grant Project for Fiscal Year 2021
https://ecology.wa.gov/fy2021-aquatic-invasive-plant-grants-offer-list
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
Soos Creek SAP Appendix 2: Historical dissolved oxygen data
Historical dissolved oxygen data
https://ecology.wa.gov/soos-creek-sap-appendix-2-historical-dissolved-ox
Soos Creek SAP Appendix 3: Discharge, water temperature, air temperature graphs
Discharge, water temperature, air temperature graphs
https://ecology.wa.gov/soos-creek-sap-appendix-3-discharge-water-temper
Water Quality Fiscal Year 2013 - 2015 Biennium Outcomes Report
2 year report on Water Quality projects funded by Ecology, covering Fiscal Years 2013 through 2015
https://ecology.wa.gov/fiscal-year-2013-2015-biennium-outcomes-report-f
Biosolids facilities list 2025
This is Ecology's official list of biosolids facilities in Washington.
https://ecology.wa.gov/biosolids-facilities-list-a5a06e95e96db8d865eedf1f5db8a461
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