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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109 results

Input data for modeling emissions inventory for Prevention of Significant Deterioration-permitted facilities

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

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

2018 State Agency Greenhouse Gas Calculator

An Excel file to help you determine you emissions.

https://ecology.wa.gov/2018stateagencycalculator

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

This is the agenda for the May 5, 2023 stakeholder meeting for Chapter 173-408 WAC, Landfill Methane Emissions.

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

Agenda (WAC 173-408) 3-30-23

This is the agenda for the March 30, 2023 stakeholder meeting for Chapter 173-408 WAC, Landfill Methane Emissions.

https://ecology.wa.gov/agenda-wac-173-408-3-30-23

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

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

https://ecology.wa.gov/agenda-wac-173-408-6-21-23

Draft rule language (WAC 173-408) 6-8-23

This is the June 8, 2023 draft rule language for Chapter 173-408 WAC, Landfill Methane Emissions.

https://ecology.wa.gov/draft-rule-language-wac-173-408-6-8-23

Draft rule language (WAC 173-408) 5-3-23

This is the May 3, 2023 draft rule language for Chapter 173-408 WAC, Landfill Methane Emissions.

https://ecology.wa.gov/draft-rule-language-wac-173-408-5-3-23

Draft rule language (WAC 173-408) 4-5-23

This is the April 5, 2023 draft rule language for Chapter 173-408 WAC, Landfill Methane Emissions.

https://ecology.wa.gov/draft-rule-language-wac-173-408-4-5-23

Rulemaking Adoption Notice (WAC 173-407) 02/21/18

This is a rulemaking adoption (CR-103) for WAC 173-407 Greenhouse Gas Mitigation Requirements and Emissions Performance Standard for Power Plants.

https://ecology.wa.gov/rulemaking-adoption-notice-wac-173-407-02-21-18

Rulemaking Proposal (WAC 173-407) 10/04/17

This is a rulemaking proposal (CR-102) 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-proposal-wac-173-407-20171004

Rulemaking proposed language (WAC 173-407) 10/04/17

This is proposed rule language 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-proposed-language-wac-173-407-2017100

SEPA checklist, including a staff report - non-project review form (WAC 173-442; WAC 173-441) 01/05/

This is the SEPA checklist for WAC 173-442 Clean Air Rule and WAC 173-441Reporting of Emissions of Greenhouse Gases rulemaking.

https://ecology.wa.gov/sepa-checklist-including-a-staff-report-non-p-1

SEPA checklist, including a staff report - non-project review form

This is the SEPA checklist for WAC 173-442 Clean Air Rule and WAC 173-441Reporting of Emissions of Greenhouse Gases rulemaking.

https://ecology.wa.gov/sepa-checklist-including-a-staff-report-non-pro

Rulemaking Announcement (WAC 173-441; WAC 173-446) 6-26-23

This is a rulemaking announcement (CR-101) for WAC 173-441, Reporting of Emissions of Greenhouse Gases and WAC 173-446, Climate Commitment Act Program Rule.

https://ecology.wa.gov/rulemaking-announcement-wac-173-441;-wac-173-446-6-26-23

Informal draft rule changes to 173-441 WAC for Electricity Markets rulemaking

This document lists informal draft rule language changes to Chapter 173-441 WAC (Reporting of Emissions of Greenhouse Gases) for the Electricity Markets rulemaking.

https://ecology.wa.gov/informal-draft-rule-changes-to-173-441-wac-for-electricity-markets-rulemaking

Rulemaking Proposal (WAC 173-408) 10-30-23

This is a rulemaking proposal (CR-102) for Chapter 173-408 WAC, Landfill Methane Emissions.

https://ecology.wa.gov/rulemaking-proposal-wac-173-408-10-30-23

Rulemaking proposed language (WAC 173-408) 10-30-23

This is proposed rule language for Chapter 173-408 WAC, Landfill Methane Emissions.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-408-10-30-23

Draft rule changes (not tracked) to 173-441 WAC for Electricity Markets rulemaking (1/23/24)

This document lists the third informal draft rule language changes (not tracked) to Chapter 173-441 WAC (Reporting of Emissions of Greenhouse Gases) for the Electricity Markets rulemaking.

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

Draft rule changes (tracked) to 173-441 WAC for Electricity Markets rulemaking (1/23/24)

This document lists the third informal draft rule language changes (tracked) to Chapter 173-441 WAC (Reporting of Emissions of Greenhouse Gases) for the Electricity Markets rulemaking.

https://ecology.wa.gov/draft-rule-changes-tracked-to-173-441-wac-for-electricity-markets-rulemaking-1-23-24

Adopted rule language (WAC 173-408) 5-13-24

This is adopted rule language for Chapter 173-408 WAC. Landfill Methane Emissions.

https://ecology.wa.gov/adopted-rule-language-wac-173-408-5-13-24