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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Draft rule language (WAC 173-400) 3-18-24

This is the March 18, 2024 draft rule language for Chapter 173-400 WAC, General Regulations for Air Pollution Sources.

https://ecology.wa.gov/draft-rule-language-wac-173-400-3-18-24

Draft rule language (WAC 173-401) 3-18-24

This is the March 18, 2024 draft rule language for Chapter 173-401 WAC, Operating Permit Regulations.

https://ecology.wa.gov/draft-rule-language-wac-173-401-3-18-24

Presentation (WAC 173-400; WAC 173-401) 4-18-24

This is a presentation for the April 18, 2024 stakeholder meeting for Chapter 173-400 WAC, General Regulations for Air Pollution Sources and Chapter 173-401 WAC, Operating Permit Regulation.

https://ecology.wa.gov/presentation-wac-173-400;-wac-173-401-4-18-24

Presentation (WAC 173-400; WAC 173-401) 5-15-24

This is a presentation for the May 15, 2024 stakeholder meeting for Chapter 173-400 WAC, General Regulations for Air Pollution Sources and Chapter 173-401 WAC, Operating Permit Regulation.

https://ecology.wa.gov/presentation-wac-173-400;-wac-173-401-5-15-24

CCA Funds Reporting Rulemaking Public Hearing I

Presentation deck for the June 5th and 13th CCA funds reporting rulemaking public hearings

https://ecology.wa.gov/presentation-wac-173-446b-6-5-24

CaptionsLunchNLearn

Captions for WRIA 1 Adjudication Lunch and Learn discussing water right documents

https://ecology.wa.gov/captions-wria-1-lunchnlearn

PostcardMailerApril2024

A postcard mailer sent to WRIA 1 residents to inform them of the upcoming adjudication in May 2024

https://ecology.wa.gov/postcard-mailer-april-2024

PostcardMailerJune2024

Postcard mailer sent to WRIA 1 residents following the filing of the Nooksack Adjudication

https://ecology.wa.gov/postcard-mailer-june-2024

2025 brand association list

This document includes a list of registered brands and their associated manufacturers for the E-Cycle Washington program.

https://ecology.wa.gov/2025-brand-association-list

2025 fee tier sorted by manufacturer

This document includes a list of registered manufacturers and their associated 2025 fee tier for the E-Cycle WA program.

https://ecology.wa.gov/2025-fee-tier-sorted-by-manufacturer

Listening Session: Liquid Fuels and Mass Balance Accounting

.pdf presentation for June 12, 2024 listening session on liquid fuels and mass balance accounting

https://ecology.wa.gov/presentation-wac-173-424-6-12-24

Proposal Notice - CR 102 form

CR 102 for WAC 173-441, 446

https://ecology.wa.gov/rulemaking-proposal-wac-173-441;-wac-173-446-6-27-24

Air Operating Permit Report for Fiscal Years 2026 and 2027, June 2024

This is the workload analysis and budget report for the Air Operating Permit Program for Fiscal Years 2026 and 2027, June 2024 version.

https://ecology.wa.gov/202406aopreportfy26

Air Operating Permit Report for Fiscal Years 2024 and 2025, October 2023

This is the workload analysis and budget report for the Air Operating Permit Program for Fiscal Years 2024 and 2025, October 2023 version.

https://ecology.wa.gov/202310aopreportfy24

Air Operating Permit Report for Fiscal Years 2022 and 2023, updated November 2021

This is the workload analysis and budget report for the Air Operating Permit Program for Fiscal Years 2022 and 2023, updated November 2021.

https://ecology.wa.gov/202111aopreportfy22

Brownfields funding opportunities in Washington State

Download a comprehensive list of federal and state funding and technical assistance opportunities for redeveloping brownfields in Washington.

https://ecology.wa.gov/brownfieldsfundingoverview

AltChart-WasteTires

This is an .xlsx file

https://ecology.wa.gov/altchart-wastetires

Draft proposed rules changes to 173-441 WAC

.pdf of draft rule changes for WAC 173-441

https://ecology.wa.gov/draft-rule-language-173-441-wac-7-1-24

Draft proposed rules changes to 173-446 WAC

.pdf of draft rule changes for WAC 173-446

https://ecology.wa.gov/draft-rule-language-173-441-wac-7-1-26