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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Laboratory Accreditation Rulemaking Presentation

This is a PDF file of presentation slides that summarize the rulemaking process.

https://ecology.wa.gov/rulemaking-presentation

Rulemaking Proposal (WAC 173-201A) 10/18/21

This is a rulemaking proposal (CR-102) for WAC 173-201A Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/rulemaking-proposal-wac-173-201a-10-18-21

Rulemaking Proposal (WAC 173-201A) 3/24/21

This is a rulemaking proposal (CR-102) for WAC 173-201A Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/rulemaking-proposal-wac-173-201a-3-24-21

Rulemaking Proposal — Continuance (WAC 173-182) 8/21/19

This is a rulemaking proposal (CR-102) continuance for WAC 173-182 Oil Spill Contingency Plan.

https://ecology.wa.gov/rulemaking-proposal-continuance-wac-173-182-8

Rulemaking Proposal — Continuance (WAC 173-186) 7/11/19

This is a rulemaking proposal (CR-102) continuance for WAC 173-186 Oil Spill Contingency Plan - Railroad.

https://ecology.wa.gov/rulemaking-proposal-continuance-wac-173-186-7

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

This is a rulemaking proposal (CR-102) for WAC 173-186 Oil Spill Contingency Plan - Railroad.

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

Rulemaking Proposal (WAC 173-201A) 07/30/19

This is a rulemaking proposal (CR-102) for WAC 173-201A multiple revisions to WQ Standards

https://ecology.wa.gov/rulemaking-proposal-wac-173-201a-07-30-19

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

This is a rulemaking proposal (CR-102) for WAC 173-182 Oil Spill Contingency Plan.

https://ecology.wa.gov/rulemaking-proposal-wac-173-182-08-07-19

Rulemaking proposal CR-102 (173-166 WAC) 01/02/2018

This is a rulemaking proposal (CR-102) for WAC 173-166 Emergency Drought Relief

https://ecology.wa.gov/rulemaking-proposal-173-166-wac-01-02-2018

Rulemaking Proposal (WAC 173-180; WAC 173-184) 01/03/23

This is a rulemaking proposal (CR-102) for WAC 173-180 Facility Oil Handling Standards; WAC 173-184 Vessel Oil Transfer Advance Notice and Containment Requirements.

https://ecology.wa.gov/rulemaking-proposal-wac-173-180;-wac-173-184-01-03

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

This is a rulemaking proposal (CR-102) for WAC 173-201A Water quality standards for surface waters of the state of Washington.

https://ecology.wa.gov/rulemaking-proposal-wac-173-201a-02-01-16

Rulemaking Proposal (WAC 173-03) 9/15/17

This is a rulemaking proposal (CR 102) for Public Records

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

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

This is a rulemaking proposal (CR-102) for WAC 173-201A Water quality standards for surface waters of the state of Washington.

https://ecology.wa.gov/rulemaking-proposal-wac-173-201a-01-08-15

Rulemaking Proposal (WAC 173-185) 9-2-20

This is a rulemaking proposal (CR-102) for WAC 173-185 Oil Movement by Rail and Pipeline Notification

https://ecology.wa.gov/rulemaking-proposal-wac-173-185-9-2-20

Rulemaking proposal (WAC 173-219) Aug. 23, 2017

This is a rulemaking proposal (CR-102) for WAC 173-219 Reclaimed Water

https://ecology.wa.gov/rulemaking-proposal-wac-173-219-08-23-17

Rulemaking Proposal (WAC 173-201A) 07/18/23

This is a rulemaking proposal (CR-102) for WAC 173-201A Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/rulemaking-proposal-wac-173-201a-07-18-23

This is a rulemaking proposal (CR-102) for WAC 173-201A 02/15/24

This is a rulemaking proposal (CR-102) for WAC 173-201A Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/rulemaking-proposal-wac-173-201a-02-15-24

Rulemaking Overview (WAC 173-18; WAC 173-20; WAC 173-22; WAC 173-26; WAC 173-27)

This is a rulemaking overview for WAC 173-18; WAC 173-20; WAC 173-22; WAC 173-26; WAC 173-27

https://ecology.wa.gov/rulemaking-overview-wac-173-18;-wac-173-20;-wac-173-22;-wac-173-26;-wac-173-27

Rulemaking Proposal (WAC 173-201A) 5/10/24

This is a rulemaking proposal (CR-102) for WAC 173-201A Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/rulemaking-proposal-wac-173-201a-5-10-24

Rulemaking Proposal (WAC 173-201A) 09/17/2024

This is a rulemaking proposal (CR-102) for Water Quality Standards for Surface Waters of the State of Washington

https://ecology.wa.gov/rulemaking-proposal-wac-173-201a-09-17-2024