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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7Q10 for High Flows on the Columbia/Snake Rivers

Guidelines for arriving at 7Q10 for dissolved gas standards.

https://ecology.wa.gov/7q10forhighflows

Adopted rule language (WAC 173-555) 01/27/15

This is adopted rule language for WAC 173-555 Water Resources Program in the Little Spokane River basin, WRIA 55.

https://ecology.wa.gov/adopted-rule-language-wac-173-555-01-27-15

Adopted rule language (WAC 173-166) 04/11/18

This is adopted rule language for WAC 173-166 Emergency Drought Relief

https://ecology.wa.gov/adopted-rule-language-wac-173-166-04-11-18

Adopted rule language (WAC 173-167) -7/28/2021

This is adopted rule language for WAC 173-167 Emergency Drought Funding

https://ecology.wa.gov/adopted-rule-language-wac-173-167-07-28-2021

Adopted rule language (WAC 173-501) 05/27/2020

This is the adopted rule language for (WAC 173-501) Instream Resources Protection Program - Nooksack Water Resource Inventory Area (WRIA) 1

https://ecology.wa.gov/adopted-rule-language-wac-173-501-05-27-2020

Adopted emergency rule language (WAC 173-167) 06/04/2019

This is an emergency adopted rule language for WAC 173-167 Emergency Drought Funding

https://ecology.wa.gov/adopted-rule-language-wac-173-167-06-04-19-1

Adopted rule language (WAC 173-557) 01/27/15

This is adopted rule language for WAC 173-557 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer.

https://ecology.wa.gov/adopted-rule-language-wac-173-557-01-27-15

2012 Instream Flow Recommendations for the Spokane River (WAC 173-557; 173-555) 01/27/15

2012 Instream Flow Recommendations for the Spokane River - Hal Beecher, WDFW Instream Flow Biologist May 31, 2012 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/2012-instream-flow-recommendations-for-the-spokane

2018WAG993011AnnualRpt

2018 Z. Japonica Coast Seafood Annual Report

https://ecology.wa.gov/2018wag993011annualrpt

Chapter 173-167 WAC: Emergency Drought Funding

Adopted rule language for Chapter 173-167 WAC: Emergency Drought Funding

https://ecology.wa.gov/adopted-rule-language-wac-173-167-07-24-2023

2024 CR-103 Emergency Adopted rule

Emergency Drought declaration Adopted rule for 2024

https://ecology.wa.gov/rulemaking-emergency-adoption-notice-wac-173-167-07-24-2024

2024 Drought Rule Language

Rule language for the 2024 Emergency Drought Declaration, to accompany the CR-103 adopted rule

https://ecology.wa.gov/adopted-rule-language-wac-173-167-04-16-2024

Adopted emergency rule language (WAC 173-167) 08/14/24

This is an emergency adopted rule language for WAC 173-167

https://ecology.wa.gov/adopted-emergency-rule-language-wac-173-167-08-14-24

Adopted Rule Language (WAC 173-167) 12/11/24

This is the adopted rule language for Chapter 173-167 WAC (AO 24-04)

https://ecology.wa.gov/adopted-rule-language-wac-173-167-12-11-24

Online tool: Stormwater Pollutants and Their Adverse Impacts

Guidance in the 2024 Stormwater Management Manual for Western Washington

https://ecology.wa.gov/online-tool-stormwater-pollutants-and-their-adverse-impacts

Email list: Water resource updates, GovDelivery list

This is an email subscription list for updates about water resources and water availability in Washington state.

https://ecology.wa.gov/email-list-water-resource-updates-govdelivery-list

Form 1: Measuring Device Information

This form is for water users to complete to provide information about meters a water user is using to meter water usage. Instructions are included with the form.

https://ecology.wa.gov/form-1-measuring-device-information

Lower Snake River Water Supply Replacement Study

The Bureau of Reclamation and Ecology are partnering to study water replacement on the Lower Snake River. The study goal is to obtain a detailed understanding of current water supply and irrigation, municipal and industrial uses near the four Lower Snake River dams (Ice Harbor, Lower Monumental, Little Goose, Lower Granite) in Washington and Idaho, evaluate impacts to water delivery in the event C

https://ecology.wa.gov/lower-snake-river-water-supply-replacement-study

Documents library: Nooksack WRIA 1 adjudication information

This document collection includes the "Let’s Talk About Adjudication" e-newsletters and documents filed with Whatcom County Superior Court.

https://ecology.wa.gov/documents-library-nooksack-wria-1-adjudication-information

Sign-up form: Home on a Well – Open House and Workshop

Get information to help you fill out your Nooksack adjudication court claim form

https://ecology.wa.gov/sign-up-form-home-on-a-well-open-house-and-workshop