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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2018 Draft Water Quality Assessment 4B Analyses

This is part of Ecology's submittal to EPA for the 2018 Water Quality Assessment.

https://ecology.wa.gov/2018-draft-wqa-4b-analyses

2018 Deschutes TMDL Cover Letter

This cover letter is included in the TMDL document to address the EPA decisions about this TMDL

https://ecology.wa.gov/2018-deschutes-tmdl-cover-letter

Determinations for Data and Information Submitted

This explains how Ecology used narrative data and information submitted for the 2018 Draft Water Quality Assessment

https://ecology.wa.gov/2018-draft-wqa-determinations-for-data-and-informa

Guidance for Public Review

This is a guide on how to review and comment on the draft Water Quality Assessment

https://ecology.wa.gov/2018-draft-wqa-guidance-for-public-review

2018 Modified Sand & Gravel General Permit

Sand & Gravel General Permit language modified 2018.

https://ecology.wa.gov/2018-modified-sand-gravel-general-permit

Response to comments 2018

This document is the response to public comment period held on the 2018 permit modification.

https://ecology.wa.gov/2018-response-to-comments

2018 EWA Formal Workshops Agenda

Agenda for the 2018 Formal Workshops and Public Hearings in Eastern WA

https://ecology.wa.gov/2018-ewa-formal-workshops-agenda

2017 settlement Agreement Sand & Gravel

Sand & Gravel 2017 settlement Agreement with WACA

https://ecology.wa.gov/2017settlementagreemt

Public meeting table prompts for MS4 reissuance 2017

This is the list of table prompts from the public meeting for the MS4 reissuance process.

https://ecology.wa.gov/2017pubmtgtableprompts

2017 Pretreatment Plan

2017 Coast Seafood Z. japonica Pretreatment Plan

https://ecology.wa.gov/2017wag993011pretrtplan

Coast Pretreatment plan for 2018

Annual pretreatment plan for Zostera Japonica control on commercial clam beds in Willapa Bay.

https://ecology.wa.gov/2018-pretreatment-plan-for-coast

2017 Pretreatment Plan

2017 Taylor Shellfish Z. japonica Pretreatment Plan

https://ecology.wa.gov/2017wag993005pretrtplan

2017 Pretreatment Plan

2017 Wiegardt and Sons Z. japonica Pretreatment Plan

https://ecology.wa.gov/2017wag993006pretrtplan

2017 Pretreatment Plan

2017 Station House Oysters Z. japonica Pretreatment Plan

https://ecology.wa.gov/2017wag993004pretrtplan

2017 Pretreatment Plan

2017 Northern Oyster Company Z. japonica Pretreatment Plan

https://ecology.wa.gov/2017wag993007pretrtplan

2017 Pretreatment Plan

2017 Willapa Bay Shellfish Z. japonica Pretreatment Plan

https://ecology.wa.gov/2017wag993008pretrtplan

2017 Pretreatment Plan

2017 Herrold Fish Oyster Z. japonica Pretreatment Plan

https://ecology.wa.gov/2017wag993009pretrtplan

2017 Pretreatment Plan

2017 Heckes Clam Inc Z. japonica Pretreatment Plan

https://ecology.wa.gov/2017wag993010pretrtplan