Research & Data

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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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Rulemaking Announcement (WAC 173-224) 06/07/22

This is a rulemaking announcement (CR-101) for WAC 173-224 Water Quality Permit Fees..

https://ecology.wa.gov/rulemaking-announcement-wac-173-224-06-07-22

Rulemaking Announcement (WAC 173-305) 09/14/22

This is a rulemaking announcement (CR-101) for WAC 173-305 Hazardous Waste Planning Fee

https://ecology.wa.gov/rulemaking-announcement-wac-173-305-09-14-22

Rulemaking Announcement (WAC 173-337) 11/17/21

This is a rulemaking announcement (CR-101) for WAC 173-337 Safer Products Restrictions and Reporting

https://ecology.wa.gov/rulemaking-announcement-wac-173-337-11-17-21

Rulemaking Announcement (WAC 173-224) 11/09/20

This is a rulemaking announcement (CR-101) for WAC 173-224 Water Quality Fees

https://ecology.wa.gov/rulemaking-announcement-wac-173-224-11-09-20

Rulemaking Announcement (WAC 173-323)

This is a rulemaking announcement for WAC 173-323 Grants and Loans

https://ecology.wa.gov/rulemaking-announcement-wac-173-323-7-25-17

Rulemaking Announcement (WAC 173-340) 12/20/18

This is a rulemaking announcement (CR-101) for WAC 173-340, Model Toxics Control Act - Cleanup

https://ecology.wa.gov/rulemaking-announcement-wac-173-340-12-20-18

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 Announcement (WAC 173-230) 06/22/18

This is a rulemaking announcement (CR-101) for WAC 173-230

https://ecology.wa.gov/rulemaking-announcement-wac-173-230-06-22-18

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

Rulemaking announcement (WAC 173-400) 07/17/18

This is the rulemaking announcement (CR-101) for WAC 173-400, General Regulations for Air Pollution Sources.

https://ecology.wa.gov/rulemaking-announcement-wac-173-400-07-17-18

Rulemaking Announcement (WAC 173-405; WAC 173-410; WAC 173-415) 06/20/18

This is a rulemaking announcement (CR-101) for WAC 173-405, Kraft Pulping Mills; WAC 173-410 Sulfite Pulping Mills; WAC 173-415 Primary Aluminum Plants.

https://ecology.wa.gov/rulemaking-announcement-wac-173-405;-wac-173-410;

Rulemaking Announcement 07/21/15

This is the first rulemaking announcement (CR 101) for Chapter 173-400 WAC General Regulations for Air Pollution Sources; Chapter 173-401 WAC Operating Permit Regulation.

https://ecology.wa.gov/rulemaking-announcement-wac-173-400;401-12-16-16

Rulemaking Announcement 12/16/16

This is the withdrawn rulemaking announcement (CR 101) for Chapter 173-400 WAC General Regulations for Air Pollution Sources; Chapter 173-401 WAC Operating Permit Regulation.

https://ecology.wa.gov/rulemaking-announcement-wc-173-400;401-07-21-15

Rulemaking Announcement (WAC 173-305) 11/22/23

This is a rulemaking announcement (CR-101) for WAC 173-305 Hazardous Waste Planning Fee

https://ecology.wa.gov/rulemaking-announcement-wac-173-305-11-22-23

Rulemaking Announcement (WAC 173-337) 12/08/23

This is a rulemaking announcement (CR-101) for WAC 173-337 Safer Products Restrictions and Reporting.

https://ecology.wa.gov/rulemaking-announcement-wac-173-337-12-06-23

Rulemaking Announcement (WAC 173-400; WAC 173-401) 01-18-24

This is a rulemaking announcement (CR-101) for WAC 173-400, General Regulations for Air Pollution Sources and WAC 173-401, Operating Permit Regulation.

https://ecology.wa.gov/rulemaking-announcement-wac-173-400;-wac-173-401-01-18-24

Rulemaking Announcement (WAC 173-339) MM/DD/YY

This is the rulemaking announcement (CR-101) for WAC 173-339)

https://ecology.wa.gov/rulemaking-announcement-wac-173-339-mm-dd-yy

Water Quality Fees Rulemaking Announcement

This is a rulemaking announcement (CR-101) for WAC 173-224 Water Quality Permit Fees..

https://ecology.wa.gov/rulemaking-announcement-wac-173-224-8-7-2024

Rulemaking Announcement (WAC 173-423) 11-20-24

CR 101 for WAC 173-423

https://ecology.wa.gov/rulemaking-announcement-wac-173-423-11-20-24

Rulemaking Announcement (WAC 173-339) 12/19/24

Rulemaking Announcement CR 101

https://ecology.wa.gov/rulemaking-announcement-wac-173-339-12-19-24