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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PFAS information from the Department of Health

The Washington State Department of Health has information on PFAS health concerns, PFAS in drinking water, and limiting exposure.

https://ecology.wa.gov/doh-pfas

Certificate of compliance 2023

Manufacturers that produce food packaging sold in Washington must fill out a Certificate of Compliance to show they meet the PFAS in food packaging rules

https://ecology.wa.gov/certificate-of-compliance-2023

Freshwater fish contaminant monitoring

We analyze freshwater fish for various toxic chemicals.

https://ecology.wa.gov/research-data/monitoring-assessment/toxics-monitoring/freshwater-fish-contaminant-monitoring

Northeast West Plains PFAS in drinking water sampling results map

The EPA created this map to summarize where samples were taken without showing private well locations.

https://ecology.wa.gov/west-plains-pfas-sampling-results-map

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

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

SEPA checklist

This is the SEPA checklist for the draft statewide biosolids general permit.

https://ecology.wa.gov/sepa-checklist-36f4934c9ee89903e7cf59127b74e49a

AFFF EIS interactive plain text

This is the plain text version of the interactive AFFF environmental impact statement (EIS).

https://ecology.wa.gov/afff-eis-plain-text

SEPA checklist appendix C

This appendix lists the full text of some cited references for the SEPA checklist.

https://ecology.wa.gov/sepa-checklist-appendix-c

SEPA checklist appendix A

This appendix lists the full text of some cited references for the SEPA checklist.

https://ecology.wa.gov/sepa-checklist-appendix-a

SEPA checklist appendix B

This appendix lists the full text of some cited references for the SEPA checklist.

https://ecology.wa.gov/sepa-checklist-appendix-b

2025-27 Ecology Operating Budget Request

Ecology's 2025-27 operating budget request

https://ecology.wa.gov/25-27operatingrequest

2025-27 Ecology Request Operating and Capital Budget Summary

Ecology's 2025-27 Operating and Capital Budget Request Summary

https://ecology.wa.gov/25-27operating-capitalsummary09-xx-24

2023-25 Ecology Operating Budget Request

Ecology's 2023-25 operating budget request

https://ecology.wa.gov/23-25operatingrequest