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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Baseline modeling inventory for Prevention of Significant Deterioration-permitted facilities

This is a spreadsheet of the baseline modeling emissions inventory for Prevention of Significant Deterioration-permitted facilities.

https://ecology.wa.gov/201603prevsignificantdeteriorationbaseline

Transportation Fuel Supplier Greenhouse Gas Emission Calculator

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

https://ecology.wa.gov/transportationfuelsuppliertool

Draft Rule Language (WAC 173-407) 03/31/17

This is draft rule language used in the stakeholder meeting for WAC 173-407 Carbon Dioxide Mitigation Program, Greenhouse Gases Emissions Performance Standard and Sequestration Plans and Programs for Thermal Electric Generating Facilities.

https://ecology.wa.gov/draft-rule-language-wac-173-407-20170331

Draft Rule Language (WAC 173-407) 04/11/17

This is draft rule language used for the informal comment period from Apr 13 to May 12 2017 for WAC 173-407 Carbon Dioxide Mitigation Program, Greenhouse Gases Emissions Performance Standard and Sequestration Plans and Programs for Thermal Electric Generating Facilities

https://ecology.wa.gov/draft-rule-language-wac-173-407-20170411

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

This is a presentation for the 9/21/21 stakeholder meeting for Chapter 173-446A WAC, Criteria for Emissions-Intensive, Trade-Exposed Industries.

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

Draft Rule Language (WAC 173-407) 05/26/17

This is draft rule language used for informal comment period from May 26 to June 16, 2017 for WAC 173-407 Carbon Dioxide Mitigation Program, Greenhouse Gases Emissions Performance Standard and Sequestration Plans and Programs for Thermal Electric Generating Facilities

https://ecology.wa.gov/draft-rule-language-wac-173-407-20170526

Draft Rule Language (WAC 173-407) 07/17/17

This is draft rule language used for informal comment period from July 17 to July 28, 2017 for WAC 173-407 Carbon Dioxide Mitigation Program, Greenhouse Gases Emissions Performance Standard and Sequestration Plans and Programs for Thermal Electric Generating Facilities

https://ecology.wa.gov/draft-rule-language-wac-173-407-20170717

Rulemaking Adoption Notice (WAC 173-446A) 06-01-22

This is a rulemaking adoption notice (CR-103) for Chapter 173-446A WAC, Criteria for Emissions-Intensive, Trade-Exposed Industries.

https://ecology.wa.gov/rulemaking-adoption-notice-wac-173-446a-06-01-22

Rulemaking Announcement (WAC 173-446A) 08/04/21

This is a rulemaking announcement (CR-101) for Chapter 173-446A WAC, Criteria for Emissions-Intensive, Trade-Exposed Industries.

https://ecology.wa.gov/rulemaking-announcement-wac-173-446a-08-04-21

Rulemaking Announcement (WAC 173-407) 02/07/17

This is a rulemaking Announcement (CR-101) for WAC 173-407 Carbon Dioxide Mitigation Program, Greenhouse Gases Emissions Performance Standard and Sequestration Plans and Programs for Thermal Electric Generating Facilities

https://ecology.wa.gov/rulemaking-announcement-wac-173-407-20170207

Rulemaking Proposal (WAC 173-446A) 12/22/21

This is a rulemaking proposal (CR-102) for Chapter 173-446A WAC, Criteria for Emissions-Intensive, Trade-Exposed Industries.

https://ecology.wa.gov/rulemaking-proposal-wac-173-446a-12-22-21

Presentation (WAC 173-408) 5-4-23

This is a presentation for the May 4, 2023 stakeholder meeting for Chapter 173-408 WAC, Landfill Methane Emissions.

https://ecology.wa.gov/presentation-wac-173-408-5-4-23

Rulemaking proposed language (WAC 173-446A) 12/22/21

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

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-446a-12-22-21

Rulemaking Announcement (WAC 173-408) 12-08-22

This is a rulemaking announcement (CR-101) for WAC 173-408, Landfill Methane Emissions.

https://ecology.wa.gov/rulemaking-announcement-wac-173-408-12-08-22

SEPA Determination of Nonsignificance and Checklist (WAC 173-407) 10/04/17

This is SEPA DNS and Checklist for WAC 173-407 Carbon Dioxide Mitigation Program, Greenhouse Gases Emissions Performance Standard and Sequestration Plans and Programs for Thermal Electric Generating Facilities

https://ecology.wa.gov/sepa-determination-of-nonsignificance-and-checklis

WA-GREET electric power final (WAC 173-424) 06-30-22

This is the June 30, 2022 final supporting documentation for electric power pathway in WA-GREET, Washington's version of the Greenhouse Gases, Regulated Emissions, and Energy Use in Technologies Model.

https://ecology.wa.gov/wa-greet-electric-power-final-wac-173-424-06-30-22

WA-GREET electric (WAC 173-424) 06-30-22

This is the June 30, 2022 supporting documentation for electric power pathway in WA-GREET, Washington's version of the Greenhouse Gases, Regulated Emissions, and Energy Use in Technologies Model.

https://ecology.wa.gov/wa-greet-electric-wac-173-424-06-30-22

WA-GREET supplemental (WAC 173-424) 03/08/22

This is supporting documentation for WA-GREET, Washington's version of the Greenhouse Gases, Regulated Emissions, and Energy Use in Technologies Model.

https://ecology.wa.gov/wa-greet-supplemental-wac-173-424-03-08-22

Presentation (WAC 173-408) 6-21-23

This is a presentation for the June 21, 2023 stakeholder meeting for Chapter 173-408 WAC, Landfill Methane Emissions.

https://ecology.wa.gov/presentation-(wac-173-408)-6-21-23

Rulemaking Adoption Notice (WAC 173-408) 5-13-24

This is a rulemaking adoption notice (CR-103) for Chapter 173-408 WAC, Landfill Methane Emissions.

https://ecology.wa.gov/rulemaking-adoption-notice-wac-173-408-5-13-24