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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Transcript: 30 Years of Toxics Reduction and Pollution Prevention

Transcript of the audio blog, "30 Years of Toxics Reduction and Pollution Prevention"

https://ecology.wa.gov/20220105-30-years-of-p2-transcript

Updating the Air Toxics Rule (WAC 173-460)

This is the overview of rulemaking for WAC 173-460, Controls for New Sources of Toxic Air Pollutants,

https://ecology.wa.gov/updating-the-air-toxics-rule

Adopted Rule - Crosswalk with Repealed Rule and Federal Rule (WAC 173-360; WAC 173-360A) 07/17/18

This document provides a crosswalk between the provisions in the new Underground Storage Tank Rule and the provisions in both the repealed rule and the federal rule.

https://ecology.wa.gov/adopted-rule-crosswalk-with-repealed-rule-and-fede

Adopted Rule - Overview of Changes to Repealed Rule (WAC 173-360; WAC 173-360A) 07/17/18

This document provides a summary of changes to the repealed chapter, WAC 173-360. Changes highlighted grey were made to be consistent with federal rule requirements in 40 C.F.R. Part 280 or to comply with state program approval (SPA) requirements in 40 C.F.R. Part 281.

https://ecology.wa.gov/adopted-rule-overview-of-changes-to-repealed-rule

Rulemaking Announcement CR-101

Rulemaking Announcement for 173-333 WAC Chemical Action Plans.

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

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

Adopted Rule - Summary - Certification for UST Services (WAC 173-360; WAC 173-360A) 07/17/18

This table identifies the underground storage tank system services requiring use of a service provider and the certification that a service provider must have to perform those services under the new rule, Chapter 173-360A WAC.

https://ecology.wa.gov/adopted-rule-summary-table-certification-to-perfor

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 173-910) 03/10/16

This is proposed rule language for WAC 173-910 Mercury Containing Lights product Stewardship Program.

https://ecology.wa.gov/rulemaking-proposed-language-wac-173-910-03-10-1

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

Adopted Rule - Summary - Deferred UST Compliance Dates (WAC 173-360; WAC 173-360A) 07/17/18

This table summarizes the dates by which owners and operators of previously deferred underground storage tank systems installed on or before the effective date of the new rule, Chapter 173-360A WAC, need to comply with the requirements of the rule.

https://ecology.wa.gov/adopted-rule-summary-table-previously-deferred-ust

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

SEPA - Determination of Non-Significance (WAC 173-910) 03/10/16

This is the SEPA Determination of Non-significants (DNS) for the rulemaking for WAC 173-910 Mercury-Containing Lights Product Stewardship Program.

https://ecology.wa.gov/sepa-determination-of-non-significance-wac-173

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

Pharmaceutical waste regulations webinar

PDF version of the Pharmaceutical Waste Regulations webinar conducted by Ecology's health care team January 2021

https://ecology.wa.gov/webinar-pharmawaste-slides-2021

WSR 23-19-066 Commerical airport restrictions

WSR 23-19-066 requires commercial airports in Washington procure non-PFAS firefighting agents by 2025.

https://ecology.wa.gov/wsr-23-19-066

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

Aug 14 webinar slides

This is the presentation for the Cycle 1.5 webinar conducted on Aug. 14, 2024

https://ecology.wa.gov/webinar-presentation-aug-14

SEPA determination of nonsignificance

This document is a determination of nonsignificance (DNS) in which Ecology has determined the proposed biosolids general permit will not have a probable significant adverse impact on the environment.

https://ecology.wa.gov/sepa-determination-of-nonsignificance-26201b433614b0478c7dbc8114f0a4ba

SPWA Sept 25 webinar materials

This is the PowerPoint presentation for the webinar conducted on Sept. 25, 2024 for WAC 173-339.

https://ecology.wa.gov/sept-25-webinar-materials