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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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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 173-400) 11/29/17

This is draft rule language for Chapter 173-400 WAC, General Regulations for Air Pollution Sources. (11/29/17)

https://ecology.wa.gov/draft-rule-language-wac-173-400-11-29-17

Draft rule language (WAC 173-400) 10/10/18

This is draft rule language for Chapter 173-400 WAC, General Regulations for Air Pollution Sources. (10/10/18)

https://ecology.wa.gov/sru-alternative-emission-standard10_10_18_

Draft rule language (WAC 173-400) 12/04/18

This is draft rule language for Chapter 173-400 WAC, General Regulations for Air Pollution Sources. (12/4/18)

https://ecology.wa.gov/draft-rule-language-wac-173-400-12-04-18

Draft rule language (WAC 173-400) 01/24/19

This is draft rule language for Chapter 173-400 WAC, General Regulations for Air Pollution Sources. (1/24/19)

https://ecology.wa.gov/draft-rule-language-for-wac-173-400-wac-173-400

Draft rule language (173-446B WAC) 11-13-23

This is draft rule language for Chapter 173-446B WAC, the Climate Commitment Act Funds Reporting Rulemaking.

https://ecology.wa.gov/draft-language-chapter-173-446b-wac

Draft rule changes (not tracked) to 173-446 WAC for Electricity Markets rulemaking (1/23/24)

This document lists the third informal draft rule language changes (not tracked) to Chapter 173-446 WAC (Climate Commitment Act Program) for the Electricity Markets rulemaking.

https://ecology.wa.gov/informal-draft-rule-changes-to-173-446-wac-for-electricity-markets-rulemaking-1-22-24

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

Draft rule changes (tracked) to 173-446 WAC for Electricity Markets rulemaking (1/23/24)

This document lists the third informal draft rule language changes (tracked) to Chapter 173-446 WAC (Climate Commitment Act Program) for the Electricity Markets rulemaking.

https://ecology.wa.gov/draft-rule-changes-tracked-to-173-446-wac-for-electricity-markets-rulemaking-1-23-24

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

Draft proposed rules changes to 173-441 WAC

.pdf of draft rule changes for WAC 173-441

https://ecology.wa.gov/draft-rule-language-173-441-wac-7-1-24

Draft proposed rules changes to 173-446 WAC

.pdf of draft rule changes for WAC 173-446

https://ecology.wa.gov/draft-rule-language-173-441-wac-7-1-26

CFS Draft Rule - Changes Summary

Summary of proposed changes to WAC 173-424

https://ecology.wa.gov/draft-rule-changes-summary-wac-173-424-8-30-24

Draft rule language (173-424-800 - 173-424-850)

Summary of proposed changes to WAC 173-424-800

https://ecology.wa.gov/draft-rule-language-173-424-800-173-424-850

Draft rule language (tracked) (173-424)

Summary of proposed changes to WAC 173-424

https://ecology.wa.gov/draft-rule-language-tracked-173-424

Draft rule language WAC 173-337

This is the draft rule language for WAC 173-337.

https://ecology.wa.gov/draft-rule-language-wac-173-337

Draft rule language (tracked) (173-446)

draft rule language for WAC 173-446, offsets protocols

https://ecology.wa.gov/draft-rule-language-173-446-wac-10-1-24

Draft rule changes summary-updated (WAC 173-424) 12-4-2024

“Rule Changes Summary” is a summary table of the changes we made since our initial draft in August.

https://ecology.wa.gov/draft-rule-changes-summary-wac-173-424-11-26-24

Draft proposed rules changes to 173-443 WAC

draft rule language for WAC 173-443, hydrofluorocarbons

https://ecology.wa.gov/draft-rule-changes-summary-wac-173-443-1-16-25