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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Inslee statement on Clean Air Rule decision

Statement by Gov. Jay Inslee on 1-16-20 related to the Supreme Court ruling on the Clean Air Rule.

https://ecology.wa.gov/inslee-statement-on-clean-air-rule-decision

DRAFT: Identifying Overburdened Communities Highly Impacted by Air Pollution General Overview, August 2022

This is the August 2022 draft report about the process to identify communities highly impacted by air pollution.

https://ecology.wa.gov/202208draftoverview

DRAFT: Identifying Overburdened Communities Highly Impacted by Air Pollution Technical Support Document, August 2022

This is the August 2022 draft technical support document about the process to identify communities highly impacted by air pollution.

https://ecology.wa.gov/202208drafttechnicalsupport

Washington Mandatory Greenhouse Gas Reporting Program - Reported Emissions for 2012-2015

Certain large facilities are required to submit their greenhouse gas emissions to Ecology. This is the report of those emissions from 2012-2015.

https://ecology.wa.gov/wa-ghg-reporting-data-2012-2015

Transportation Fuel Supplier Greenhouse Gas Emission Calculator

This tool helps transportation fuel suppliers calculate their greenhouse gas emissions.

https://ecology.wa.gov/transportationfuelsuppliertool

DES Fleet Fuel Use by Permanently Leased Equipment and Daily Trip Rentals

Calculator for state agencies to determine their DES fuel usage.

https://ecology.wa.gov/2022-des-fleet-ghg-report

2023-GHGreport-Instructions

Instructions for completing your 2023 GHG report

https://ecology.wa.gov/2023-state-agency-ghg-report-instructions

Adopted rule language (WAC 173-407) 02/21/18

This is adopted rule language for WAC 173-407 Greenhouse Gas Mitigation Requirements and Emissions Performance Standard for Power Plants.

https://ecology.wa.gov/adopted-rule-language-wac-173-407-02-21-18

Adopted rule language (WAC 173-446A) 06-01-22

This is adopted rule language for Chapter 173-446A WAC, Criteria for Emissions-Intensive, Trade-Exposed Industries.

https://ecology.wa.gov/adopted-rule-language-wac-173-446a-06-01-22

Expedited Rulemaking Proposal (WAC 173-442) 03-22-23

This is an expedited rulemaking proposal (CR-105 form) for Chapter 173-442, Clean Air Rule.

https://ecology.wa.gov/expedited-rulemaking-proposal-wac-173-442-01-23-23

Agenda (WAC 173-443) 1-25-23

This is the agenda for the January 25, 2023 stakeholder meeting for Chapter 173-443 WAC, Hydrofluorocarbons.

https://ecology.wa.gov/agenda-wac-173-443-1-25-23

Agenda (WAC 173-443) 11-17-22

This is the agenda for the November 17, 2022 stakeholder meeting for Chapter 173-443 WAC, Hydrofluorocarbons.

https://ecology.wa.gov/agenda-wac-173-443-11-17-22

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

Agenda (WAC 173-446) 01/11/22

This is the agenda for the January 11, 2022 stakeholder meeting for Chapter 173-446 WAC, Climate Commitment Act Program.

https://ecology.wa.gov/agenda-wac-173-446-01-11-22

Agenda (WAC 173-446A) 09/21/21

This is the agenda for the September 21, 2021 stakeholder meeting for Chapter 173-446A WAC, Criteria for Emissions-Intensive, Trade-Exposed Industries.

https://ecology.wa.gov/agenda-wac-173-446a-09-21-21

Rulemaking withdrawal Notice (WAC 173-491) 8/19/2021

This is a rulemaking withdrawal notice for WAC 173-491 WAC Emissions standards and controls for sources emitting gasoline vapors

https://ecology.wa.gov/rulemaking-withdrawal-wac-173-491-08-19-2021

Agenda (WAC 173-446) 12/16/21

This is the agenda for the December 16, 2021 stakeholder meeting for Chapter 173-446 WAC, Climate Commitment Act Program.

https://ecology.wa.gov/agenda-wac-173-446-12-16-21

Agenda (WAC 173-443) 9-14-22

This is the agenda for the September 14, 2022 stakeholder meeting for Chapter 173-443 WAC, Hydrofluorocarbons.

https://ecology.wa.gov/agenda-wac-173-443-9-14-22

Agenda (WAC 173-443) 7-6-22

This is the agenda for the July 6, 2022 stakeholder meeting for Chapter 173-443 WAC, Hydrofluorocarbons.

https://ecology.wa.gov/agenda-wac-173-443-7-6-22

Agenda (WAC 173-446) 11/08/21

This is the agenda for the November 8, 2021 stakeholder meeting for Chapter 173-446 WAC, Climate Commitment Act Program.

https://ecology.wa.gov/agenda-wac-173-446-11-08-21