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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Publication: Hydrofluorocarbons Adopted Rule Language – Informational Guidebook

This guidebook is supplemental and is intended to provide general information to stakeholders about the Chapter 173-443 WAC Hydrofluorocarbons (HFCs) and Other Fluorinated Greenhouse Gases rule language and how it may affect them.

https://ecology.wa.gov/publication-hydrofluorocarbons-adopted-rule-language-informational-guidebook

SEA HRPP 2024

Drone checklist for SEA HRPP project 2024

https://ecology.wa.gov/sea-hrpp-2024

2023 Local Government Satisfaction Report

This report includes the feedback from local governments about the E-Cycle Washington program's performance in 2023.

https://ecology.wa.gov/local-government-satisfaction-report

Rulemaking Adoption Notice (WAC 173-187) 6/14/24

This is a rulemaking adoption (CR-103) for WAC 173-187 Financial Responsibility

https://ecology.wa.gov/rulemaking-adoption-notice-wac-173-187-6-14-24

Rulemaking Announcement (WAC 173-400; WAC 173-401) 01-18-24

This is a rulemaking announcement (CR-101) for WAC 173-400, General Regulations for Air Pollution Sources and WAC 173-401, Operating Permit Regulation.

https://ecology.wa.gov/rulemaking-announcement-wac-173-400;-wac-173-401-01-18-24

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

This is the agenda for the April 18, 2024 stakeholder meeting for Chapter 173-440 WAC, General Regulations for Air Pollution Sources and Chapter 173-401 WAC, Operating Permit Regulation.

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

Draft Source Test Manual (WAC 173-400; WAC 173-401) 4-9-24

This is the April 9, 2024 draft of the air quality Source Test Manual.

https://ecology.wa.gov/draft-source-test-manual-wac-173-400;-wac-173-401-4-9-24

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

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