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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Rulemaking Announcement (WAC 508-14) 11/15/10

This is a rulemaking announcement (CR-101) for WAC 508-14 Columbia Basin project - Ground Waters

https://ecology.wa.gov/rulemaking-announcement-wac-508-14-11-15-10

Rulemaking Announcement (WAC 173-525)

This is a rulemaking announcement (CR-101) for Chapter 173-525 WAC Grays-Elochoman Instream Resources Protection and Water Management Program

https://ecology.wa.gov/rulemaking-announcement-wac-173-525

Rulemaking Announcement (WAC 173-491,400, 455) 07/02/13

This is a rulemaking announcement (CR-101) for Chapter 173-400 WAC General regulation for air pollution sources; Chapter 173-455 WAC Air quality fee regulation and Chapter 173-491 WAC Emission standards and controls for sources emitting gasoline vapors.

https://ecology.wa.gov/rulemaking-announcement-wac-173-491-400-455-07

Rulemaking Announcement (WAC 173-526) 03/02/05

This is a rulemaking announcement (CR-101) for WAC 173- Title; WAC XXX-XXX Title.

https://ecology.wa.gov/rulemaking-announcement-wac-173-526-03-02-05

Rulemaking Announcement (WAC 173-503A; 02/24/04

This is a rulemaking announcement (CR-101) for WAC 173-503A Instream Resources Protection Program Lower and Upper Skagit Water Resources Inventory Area (WRIAs 3 and 4)

https://ecology.wa.gov/rulemaking-announcement-wac-173-503a;-02-24-04

Rulemaking Announcement (WAC 173-55) 06/21/23

This is a rulemaking announcement (CR-101) for WAC 173-55 Accreditation of Cannabis Laboratories.

https://ecology.wa.gov/rulemaking-announcement-wac-173-55-06-21-23

Rulemaking Announcement (WAC 173-50) 10/10/22

This is a rulemaking announcement (CR-101) for WAC 173-50 Accreditation of Environmental Laboratories.

https://ecology.wa.gov/rulemaking-announcement-wac-173-50-10-10-22

Rulemaking Announcement CR-101

Rulemaking Announcement for 173-333 WAC Chemical Action Plans.

https://ecology.wa.gov/rulemaking-announcement-cr-101

Rulemaking Announcement refile (WAC 173-503A; 02/15/05

This is a rulemaking announcement refile (CR-101) for WAC 173-503A Instream Resources Protection Program Lower and Upper Skagit Water Resources Inventory Area (WRIAs 3 and 4)

https://ecology.wa.gov/rulemaking-announcement-refile-wac-173-503a;-02-2

Rulemaking Announcement (WAC 173-910) 07/22/15

This is a rulemaking announcement (CR-101) for WAC 173-910 Mercury-Containing Lights Product Stewardship Program

https://ecology.wa.gov/rulemaking-announcement-wac-173-910-07-22-15

Rulemaking Announcement (WAC 173-566) 08/15/18

This is a rulemaking announcement (CR-101) Chapter 173-566 Streamflow Restoration Funding

https://ecology.wa.gov/rulemaking-announcement-wac-173-566-08-15-18

Rulemaking Announcement (WAC 173-501) Instream Resources Protection Program - Nooksack Water Resource Inventory Area (WRIA) 1

This is a rulemaking Announcement (WAC 173-501) Instream Resources Protection Program - Nooksack Water Resource Inventory Area (WRIA) 1

https://ecology.wa.gov/rulemaking-announcement-wac-173-501-02-05-2019

Rulemaking Announcement (WAC 173-557) 01/21/14

This is a rulemaking announcement (CR-101) for WAC 173-557 Water Resources Management Program (WRMP) for the Spokane River and Spokane Valley Rathdrum Prairie (SVRP) Aquifer and amendment to WAC 173-555-010.

https://ecology.wa.gov/rulemaking-announcement-wac-173-557-01-21-14

Rulemaking Announcement 11-08 (WAC 173-201A) 9/13/12

This is a rulemaking announcement (CR-101) for WAC 173-201A Water quality standards for surface waters of the state of Washington.

https://ecology.wa.gov/rulemaking-announcement-11-08-wac-173-201a-9-13

Rulemaking Announcement (WAC 173-455) 09-23-21

This is a rulemaking announcement (CR-101) for Chapter 173-455 WAC, Air Quality Fee Rule.

https://ecology.wa.gov/rulemaking-announcement-wac-173-455-09-23-21

Rulemaking-Announcement

A Preproposal Statement of Inquiry, announcing the beginning of an Ecology rulemaking on recycled content for plastic containers.

https://ecology.wa.gov/rulemaking-announcement-wac-173-925

Rulemaking Announcement (WAC 173-455; WAC 173-400) 04/18/18

This is the rulemaking announcement (CR-101) for WAC 173-455 Air Quality Fee rule; WAC 173-400 General Regulations for Air Pollution Sources.

https://ecology.wa.gov/rulemaking-announcement-wac173-455;-wac-173-400

Rulemaking Announcement (WAC 173-455; WAC 173-400) 02/06/2017

This is a rulemaking announcement (CR-101) for WAC 173-455 Air Quality Fee Rule; WAC 173-400 General Regulations for Air Pollution Sources.

https://ecology.wa.gov/d1609

Rulemaking Announcement (WAC 173-460) 07/18/18

This is a rulemaking announcement (CR-101) for WAC 173-460, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/rulemaking-announcement-wac-173-460-07-18-18

Rulemaking Announcement CR101( 173-26&27 WAC) 24-11-003

Rulemaking Announcement CR 101

https://ecology.wa.gov/rulemaking-announcement-cr-101-chapter-173-26-27