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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Washington Department of Commerce Clean Fuel Supply Forecast Report, September 23, 2022

This is the fuel supply forecast report written for the Washington Department of Commerce about the Clean Fuel Standard.

https://ecology.wa.gov/20220923cleanfuelforecastrpt

Washington Department of Commerce Clean Fuel Supply Forecast spreadsheet, September 23, 2022

This is the September 23, 2022 fuel supply forecast spreadsheet prepared for the Washington Department of Commerce about the Clean Fuel Standard.

https://ecology.wa.gov/20220923cleanfuelforecast

July 1, 2022 cover letter to Clean Fuel Standard Cost-Benefit Analysis Report

This is a July 1, 2022 cover letter to the independent report of the cost-benefit analysis of the Clean Fuel Standard.

https://ecology.wa.gov/20220601cfscbacover

Clean Fuel Standard Cost-Benefit Analysis Report

This is an independent report of the cost-benefit analysis of the Clean Fuel Standard.

https://ecology.wa.gov/20220512cfscba

2022 Greenhouse Gas Reporting Instructions

Instructions for state agencies on how to report their greenhouse gas emissions

https://ecology.wa.gov/20220110-ghg-reporting-instructions

May 5, 2022 list of HFC manufacturers

This is the May 5, 2022 list of manufacturers that reported the status of their use of restricted hydrofluorocarbons (HFCs).

https://ecology.wa.gov/2022hfcmanufacturers

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

November 30, 2021 list of HFC manufacturers

This is the November 30, 2021 list of manufacturers that reported the status of their use of restricted hydrofluorocarbons (HFCs).

https://ecology.wa.gov/2021hfcmanufacturers

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 for (WAC 173-441) 09/15/16

This is adopted rule language for WAC 173-441 Reporting of Emissions of Greenhouse Gases.

https://ecology.wa.gov/adopted-rule-language-for-wac-173-441-09-15-16

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

Adopted rule language (WAC 173-446) 9-29-22

This is the adopted rule language for Chapter 173-446 WAC, Climate Commitment Act Program.

https://ecology.wa.gov/adopted-rule-language-wac-173-446-9-29-22

Fleet Reporting Optional Worksheet, November 2023

This is the November 2023 fleet reporting optional worksheet to help with collecting data for reporting in the fleet reporting portal.

https://ecology.wa.gov/202306fleetreportwksht

Adopted rule language (WAC 173-442) 7-18-23

This is adopted rule language for Chapter 173-442 WAC, Clean Air Rule.

https://ecology.wa.gov/adopted-rule-language-(wac-173-442)-7-18-23

CO2 Removal Projects Standards Analysis - SCS Global Services

This independent report was commissioned by the Washington Legislature in 2021 to examine the potential for carbon removal projects in Washington.

https://ecology.wa.gov/20230726scsglobalreportcarbonsequestration

2023 Auctions Timeline

This is a chronological list of all auction-related events taking place in 2023 as part of the cap-and-invest program.

https://ecology.wa.gov/20230808ccaauctionstimeline2023

2023 State Agency Fuel Use Greenhouse Gas Reporting Tool

Excel sheet containing fuel use data from state agencies for 2023.

https://ecology.wa.gov/2023stateagencyfueluse-ghgreportingtool