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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 proposal continuance (WAC 173-525) 06/16/10

This is a rulemaking continuance for WAC 173-525 Grays-Elochoman Instream Resources Protection and Water Management Program

https://ecology.wa.gov/rulemaking-proposal-continuance-wac-173-525-06

Rulemaking Proposal Continuance (WAC 173-526) 06/16/10

This is a rulemaking proposal Continuance( CR-102) for WAC 173-526 Title.

https://ecology.wa.gov/rulemaking-proposal-continuance-wac-173-526-06-1

Rulemaking proposed language (WAC 173-201A) 02/01/16

This is proposed rule language for WAC 173-201A Water quality standards for surface waters of the state of Washington.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-201a-02-01

Rulemaking Proposal (WAC 173-910) 03/10/16

This is a rulemaking proposal (CR-102) for WAC 173-910 Mercury-Containing Lights Product Stewardship Program.

https://ecology.wa.gov/rulemaking-proposal-wac-173-910-03-10-16

Rulemaking proposed language (WAC 173-201A) 01/08/15

This is proposed rule language for WAC 173-201A Water quality standards for surface waters of the state of Washington.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-201a-01-08

Rulemaking proposed language (WAC 173-166) 01/02/2018

This is proposed rule language for WAC 173-166 Emergency Drought Relief

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-166-01-02-2

Rulemaking Proposal Language (WAC 173-182) 08/07/19

This is proposed rule language for WAC 173-182 Oil Spill Contingency Plan 07/26/19.

https://ecology.wa.gov/rulemaking-proposal-language-wac-173-182-08-07-1

Rulemaking Proposal Language (WAC 173-186) 6/5/19

This is proposed rule language for WAC 173-186 Oil Spill Contingency Plan - Railroad 6/5/19.

https://ecology.wa.gov/rulemaking-proposal-language-wac-173-186-6-5-19

Rulemaking Proposal Continuance (WAC 173-03) 10/03/17

This is a rulemaking proposal continuance for WAC 173-03 Public Records

https://ecology.wa.gov/rulemaking-proposal-continuance-wac-173-03-10-03

Rulemaking Proposal WAC 173-350 01/23/18

This is the information the agency filed with the Office of the Code Reviser on January 23, 2018 to formally propose amendments to Chapter 173-350 WAC - Solid Waste Handling Standards

https://ecology.wa.gov/rulemaking-proposal-wac-173-350-01-23-18

Rulemaking proposed language (WAC 173-180) 01/03/23

This is proposed rule language for WAC 173-180 Facility Oil Handling Standards; WAC 173-184 Vessel Oil Transfer Advance Notice and Containment Requirements.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-180-01-03-23

Rulemaking proposed language (WAC 173-184) 01/03/23

This is proposed rule language for WAC 173-180 Facility Oil Handling Standards; WAC 173-184 Vessel Oil Transfer Advance Notice and Containment Requirements.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-184-01-03-23

Rulemaking proposal language (WAC 173-03) 9/15/17

This is proposed rule language for WAC 173-03 Public Records

https://ecology.wa.gov/rulemaking-proposal-language-wac-173-03-9-15-17

Rulemaking Proposed Language for Chapter 173-201A WAC, Water Quality Standards for Surface Waters of the State of Washington

This is the proposed rule language for Chapter 173-201A WAC, Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-201a-07-17

Rulemaking proposal language for (WAC 173-441) 05/18/16

This is proposed rule language for WAC 173-441, Reporting of Emissions of Greenhouse Gases

https://ecology.wa.gov/rulemaking-proposal-language-for-wac-173-442;-wac

Rulemaking proposal language for (WAC 173-442) 05/18/16

This is proposed rule language for WAC 173-442 Clean Air Rule.