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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Process design

Process design - voluntary clean water guidance for agricultural activities

https://ecology.wa.gov/process-design

Washington LightRecycle 2017 Program Plan

This is the 2017 update to Washington's LightRecycle Program Plan.

https://ecology.wa.gov/program-plan-2017

Project area map

Washington state map depicting geographic scope of state net-pen guidance project.

https://ecology.wa.gov/project-area-map

Proposed Rule Text without Tracked Changes (WAC 173-340) 02/15/23

This document displays WAC 173-340, Model Toxics Control Act (MTCA) Cleanup Regulations, as if the proposed rule changes were adopted. This document does not track or footnote the changes.

https://ecology.wa.gov/proposed-rule-text-with-no-tracked-changes-to-curr

Proposed rule repeal language (WAC 173-442) 03-22-23

This is the proposed rule repeal language for Chapter 173-442 WAC, Clean Air Rule.

https://ecology.wa.gov/proposed-rule-repeal-language-wac-173-442-01-23-23

Proposed Rule Text with Tracked and Footnoted Changes (WAC 173-340) 02/15/23

This document tracks and footnotes proposed changes to WAC 173-340, Model Toxics Control Act (MTCA) Cleanup Regulations.

https://ecology.wa.gov/proposed-rule-text-with-tracked-and-footnoted-chan

Proposed rule language (WAC 173-501) 11/19/2019

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

https://ecology.wa.gov/proposed-rule-language-173-501

Rulemaking proposed language (WAC 173-201A) WQ Standards 07/30/19

This is the proposed rule language for WAC 173-201A multiple revisions to WQ Standards

https://ecology.wa.gov/proposed-language-wac-173-201a-07-30-19

Proposed rulemaking (WAC 173-501) 11/19/2019

This is the proposed rulemaking announcement (CR-102) Chapter 173-501 Instream Resources Protection Program - Nooksack Water Resource Inventory Area (WRIA) 1

https://ecology.wa.gov/proposed-rulemaking-cr-102-wac-173-501

Proposal Notice (WAC 173-219) - CR-102 form 06/16/15

Rule proposal notice for Chapter 173-219 WAC filed on June 16, 2016.

https://ecology.wa.gov/proposal-notice-wac-173-219-cr-102-form-06-16

Proposal Notice Continuance (WAC 173-219) - CR-102 form - 06/16/15

Proposal Notice Continuance - CR-102 form for WAC 173-219 filed on June 16, 2015 to extend public comment period to Sept. 21, 2015

https://ecology.wa.gov/proposal-notice-continuance-wac-173-219-cr-102

Proposal Notice - CR 102 form

This is the CR-102 form for rulemaking regarding requirements that some plastic products contain a minimum amount of recycled plastic.

https://ecology.wa.gov/proposal-notice-cr-102-form

Proposal Rule Language

This document contains the proposed rule language for the CR-102 phase of rulemaking regarding requirements for some plastic products to contain a minimum amount of recycled plastic.

https://ecology.wa.gov/proposal-rule-language

Proposed language for new rule, Chapter 173-360A WAC, UST Regulations 01/24/18

This document contains proposed language for the new Underground Storage Tank Regulations, WAC 173-360A.

https://ecology.wa.gov/proposed-language-for-new-rule-chapter-173-360a-w

Proposed repeal of existing rule, Chapter 173-360 WAC, UST Regulations 01/24/18

This document lists the chapters of the Washington Administrative Code that are proposed to be repealed.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-360a-01-24

Ecology Water Quality Funded Project Property Purchase Conditions and Guidance

https://ecology.wa.gov/property-purchase-conditions-and-guidance

2-6-2017 PRO-C Meeting agenda

This is the meeting agenda for the pooled resources oversight committee of the Stormwater Work Group from 2-6-2017.

https://ecology.wa.gov/pro-cagenda6feb2017

07-07-2016 PRO-C Meeting agenda and summary

This is the meeting agenda and summary for the pooled resources oversight committee of the Stormwater Work Group from 7-7-2016.

https://ecology.wa.gov/pro-cagenda7716

Proposal Notice - CR-102 form for WAC 173-187

WAC 173-187 Proposal Notice - CR-102 form

https://ecology.wa.gov/proposal-notice-cr-102-form-a1b057ef78aad59f466a82e74e8a6537

Proposed offset protocol language (WAC 173-446) 2-12-25

This is the proposed protocol language for offset rulemaking, Chapter 173-446 WAC.

https://ecology.wa.gov/proposed-offset-protocol-language-wac-173-446-2-12-25