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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 for WAC 173-405 (WAC 173-405; WAC 173-410; WAC 173-415) 07/17/18

This is draft rule language for Chapter 173-405 WAC, Kraft Pulping Mills. (7/17/18)

https://ecology.wa.gov/draft-rule-language-for-wac-173-405-wac-173-405;

Draft rule language (WAC 173-455) 5-18-22

This is the May 18, 2022 draft rule language for Chapter 173-455 WAC, Air Quality Fee Rule.

https://ecology.wa.gov/draft-rule-language-wac-173-455-5-18-22

Draft rule language (WAC 173-444) 05/07/20

This is draft rule language for Chapter 173-444 WAC, Clean Energy Transformation Rule.

https://ecology.wa.gov/draft-rule-language-wac-173-444-05-07-20

Draft rule language for WAC 173-405 (WAC 173-405; WAC 173-410; WAC 173-415) 08/14/18

This is draft rule language for Chapter 173-405 WAC, Kraft Pulping Mills. (8/14/18)

https://ecology.wa.gov/draft-rule-language-for-wac-173-405-wac-173-4-1

Draft rule language (WAC 173-444) 01/14/20

This is the draft rule language for Chapter 173-444 WAC, Clean Energy Transformation.

https://ecology.wa.gov/draft-rule-language-wac-173-444-01-14-20

Draft rule language for WAC 173-410 (WAC 173-405; WAC 173-410; WAC 173-415) 07/17/18

This is draft rule language for Chapter 173-410 WAC, Sulfite Pulping Mills. (7/17/18)

https://ecology.wa.gov/draft-rule-language-for-wac-173-410-wac-173-405;

Draft rule language for WAC 173-410 (WAC 173-405; WAC 173-410; WAC 173-415) 08/14/18

This is draft rule language for Chapter 173-410 WAC, Sulfite Pulping Mills. (8/14/18)

https://ecology.wa.gov/draft-rule-language-for-wac-173-410-wac-173-4-1

Draft rule language for WAC 173-415 (WAC 173-405; WAC 173-410; WAC 173-415) 07/17/18

This is draft rule language for Chapter 173-415 WAC, Primary Aluminum Plants. (7/17/18)

https://ecology.wa.gov/draft-rule-language-for-wac-173-415-wac-173-405;

Draft rule language (WAC 173-443) 1-27-23

This is the January 27, 2023 draft rule language for Chapter 173-443 WAC, Hydrofluorocarbons.

https://ecology.wa.gov/draft-rule-language-wac-173-443-1-27-23

Draft rule language for WAC 173-415 (WAC 173-405; WAC 173-410; WAC 173-415) 08/14/18

This is the draft rule language for Chapter 173-415 WAC, Primary Aluminum Plants. (8/14/18)

https://ecology.wa.gov/draft-rule-language-for-wac-173-415-wac-173-4-1

Draft rule language for WAC 173-400 (WAC 173-455; WAC 173-400) 2/28/18

This is draft rule language for Chapter 173-400 WAC, General Regulations for Air Pollution Sources. (2/28/18)

https://ecology.wa.gov/draft-rule-language-for-wac-173-400-wac-173-4-2

Draft rule language for WAC 173-400 (WAC 173-455; WAC 173-400) 06/27/17

This is draft rule language for WAC 173-400 on 06/27/17 for WAC 173-455 Air Quality Fee Rule; WAC 173-400 General Regulations for Air Pollution Sources.

https://ecology.wa.gov/draft-rule-language-for-wac-173-400-wac-173-4-1

Draft rule language for WAC 173-400 (WAC 173-455; WAC 173-400) 05/24/17

This is draft rule language on 5/24/17 for WAC 173-455 Air Quality Fee Rule

https://ecology.wa.gov/draft-rule-language-for-wac-173-400-05-24-17-1

Draft rule language for WAC 173-400 (WAC 173-455; WAC 173-400) 04/26/2017

This is draft rule language for WAC 173-400 General Regulations for Air Pollution Sources.

https://ecology.wa.gov/draft-rule-language-for-wac-173-400-wac-173-455;

Draft rule language (WAC 173-460) 03/05/19

This is the draft rule language for Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/draft-rule-language-wac-173-460-03-05-19

Draft rule language for Chapter 173-455 (WAC 173-455; 173-400) 2/28/18

This is draft rule language for Chapter 173-455 WAC, Air Quality Fee Rule. (2/28/18)

https://ecology.wa.gov/draft-rule-language-for-wac-173-455-wac-173-4-3

Draft rule language for WAC 173-455 (WAC 173-455; WAC 173-400) 06/27/17

This is draft rule language for Chapter 173-455 WAC, Air Quality Fee Rule; Chapter 173-400 WAC, General Regulations for Air Pollution Sources, 6/27/17 version.

https://ecology.wa.gov/draft-rule-language-for-wac-173-455-wac-173-4-2

Draft rule language for WAC 173-455 (WAC 173-455; WAC 173-400) 05/24/17

This is draft rule language for WAC 173-455 Air Quality Fee Rule.

https://ecology.wa.gov/draft-rule-language-for-wac-173-455-wac-173-4-1

Draft rule language for WAC 173-455 (WAC 173-455; WAC 173-400) 04/26/17

This is draft rule language for WAC 173-455 Air Quality Fee Rule

https://ecology.wa.gov/draft-rule-language-for-wac-173-455-wac-173-455;

Draft rule language for Chapters 173-455 and 173-400 WAC (WAC 173-455; 173-400) 2/07/18

This is draft rule language for Chapter 173-455 WAC, Air Quality Fee Rule and Chapter 173-400 WAC, General Regulations for Air Pollution Sources. (2/7/18)

https://ecology.wa.gov/draft-rule-language-for-wac-173-455;400-wac-173-4