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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A User's Guide to Compost: The Beauty of Your Lawn and Garden Blossoms from the Soil

A composting guide aimed at homeowners.

https://ecology.wa.gov/a-user-s-guide-to-compost-the-beauty-of-your-lawn

Applying Handling Charge

LightRecycle Washington - Applying the environmental handling charge

https://ecology.wa.gov/applyinghandlingcharge

Bio Recycling North Ranch Final Coverage Letter

A letter outlining the final coverage requirements for Bio Recycling's North Ranch site.

https://ecology.wa.gov/biorecyclingfinalcoverageletter12-2017

Bio Recycling North Ranch Response to Comments

Ecology's response to comments on the issuance of coverage for Bio Recycling's North Ranch site.

https://ecology.wa.gov/biorecyclingresponsetocomments12-2017

Biosolids Sampling and Analysis Plan Template

A document template for use in developing a biosolids sampling and analysis plan.

https://ecology.wa.gov/biosolids-sampling-and-analysis-plan

PCR Advisory committee meeting notes

These are notes from an advisory committee meeting, dealing with definitions regarding Washington's requirements for products to contain recycled material.

https://ecology.wa.gov/advisory-committee-meeting-notes

7-28-22 PCR Rulemaking Advisory Committee meeting summary

Meeting notes from the rulemaking advisory committee for post-consumer recycled plastics, WAC 173-925.

https://ecology.wa.gov/7-28-22-pcr-rulemaking-advisory-committee-meeting

8-18-22 Advisory committee meeting presentation

This is a presentation of the PCR rulemaking advisory committee meeting, from 8-18-22.

https://ecology.wa.gov/8-16-22-advisory-committee-meeting-presentation

8-18-22 Advisory Committee Notes

These are meeting notes from the 8-18-22 meeting of the PCR rulemaking advisory committee.

https://ecology.wa.gov/8-16-22-advisory-committee-notes

9-29-22 PCR Rulemaking Meeting Notes

This document contains summary notes from the final meeting of the post-consumer resin rulemaking advisory committee.

https://ecology.wa.gov/9-29-22-pcr-rulemaking-meeting-notes

9-29-22 PCR Rulemaking Meeting Notes

This document contains summary notes from the final meeting of the post-consumer resin rulemaking advisory committee.

https://ecology.wa.gov/9-29-22-pcr-rulemaking-meeting-notes-1

Ace Metal Co. Audit Report

This document includes information about direct processor, Ace Metal Co., and includes their annual environmental audit report. This audit verifies compliance with the performance standards for direct processors in the E-Cycle WA program.

https://ecology.wa.gov/acemetalauditsummary2017-pdf

2024 brand association list

This document includes a list of registered brands and their associated manufacturers for the E-Cycle Washington program.

https://ecology.wa.gov/2024-brand-association-list

Alt chart-Biosolids quality and use 2022

This spreadsheet is an alternative version of a chart representing Washington's biosolids management.

https://ecology.wa.gov/alt-chart-biosolids-quality-and-use-2022

Biosolids_EasternWA_LandApp

This map shows locations of biosolids land application sites in Eastern Washington.

https://ecology.wa.gov/biosolids_easternwa_landapp

Biosolids_WesternWA_LandApp

This map shows locations of biosolids land application sites in Western Washington.

https://ecology.wa.gov/biosolids_westernwa_landapp

Alt chart-Biosolids quality and use 2022

This spreadsheet is an alternative version of a chart representing Washington's biosolids management.

https://ecology.wa.gov/alt-chart-biosolids-quality-and-use-2022-052aecf47b873b032b1db858be036363

Battery Stewardship Rule Advisory Committee 9-23-24 meeting read-along document

This is the meeting read-along document for the Battery Rulemaking Advisory Committee's Sept. 23, 2024 meeting.

https://ecology.wa.gov/9-23-24-meeting-read-along-document

2024 YTD Statistics WMMFA

This report includes the year-to-date collection statistics for the E-Cycle Washington program in 2024.

https://ecology.wa.gov/2024-ytd-wmmfa

Biosolids facilities list 2025

This is Ecology's official list of biosolids facilities in Washington.

https://ecology.wa.gov/biosolids-facilities-list-a5a06e95e96db8d865eedf1f5db8a461