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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The Tri-Cities Ozone Precursor Study

A report on the ozone study conducted in the Tri-Cities area.

https://ecology.wa.gov/20171212tricitiesozoneprecursorstudy

State Implementation Plan Process

This is the text version of the steps to develop and finalize a state implementation plan.

https://ecology.wa.gov/171026stateimplementationplanprocess-alt-docx

VW Final Executed Trust Agreements, October 2017

United States' notice of final trust agreement for VW federal settlement.

https://ecology.wa.gov/vwfinalexecutedtrust-agreements

2017 VW affected vehicles registered in Washington.

The text version for the map showing where, by percentage, the affected cars are registered in Washington.

https://ecology.wa.gov/2017affectedvwcars-alt

Areas affected by nitrogen oxides emissions in Washington

Map of nitrogen oxides emissions from diesel Volkswagen (VW) vehicles in Washington

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

2017 VW Diesel NOx By Census

An Excel file that shows 2017 Diesel NOx pollution by census tract.

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

Volkswagen (VW) Nitrogen Oxides Emissions in Washington-alt

The text version of the map where the nitrogen oxides emissions can be found in Washington.

https://ecology.wa.gov/2017vwnitrogenoxideemissions-alt

2017 affected Volkswagen (VW) registered vehicles in Washington

Top Washington counties with registered 2.0 and 3.0 liter diesel Volkswagen (VW) vehicles

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

Oath Approval Order 16AQ-E012 Amendment 2

This is the 2017 amendment 2 approval order for Oath Holdings in Quincy.

https://ecology.wa.gov/20171222oath16aq-e012amend2

2018 Draft Acceptable Source Impact Levels (ASIL) Options (WAC 173-460) 07/26/18

This is a 7/26/18 spreadsheet of options to update the list of acceptable source impact levels (ASIL) in Chapter 173-460 WAC.

https://ecology.wa.gov/2018-asil-options-wac-173-460-07-26-18

Yahoo Data Center - Legal notice for revised Notice of Construction permit

Legal notice for revised Notice of Construction permit for Yahoo Data Center, 8/8/17

https://ecology.wa.gov/yahoolegalnotice08082017

Yahoo Data Center - Technical Support Document for Notice of Construction permit

Technical Support Document for Notice of Construction permit for Yahoo Data Center, 7/13/17

https://ecology.wa.gov/yahoopd16aqe012amd1

Yahoo Data Center - Notice of Construction application

Notice of Construction application for Yahoo Data Center, 6/9/17

https://ecology.wa.gov/yahoonocapp060917

Vantage Data Center, Quincy Agreed Order with TSD & R2C

This is the Agreed Order 16AQ-E026 for Vantage Data Center with the Technical Support Doc and the Response to Comments attached.

https://ecology.wa.gov/201712vantagequincyao16aq-e026-tsd-r2c

2018 Draft Acceptable Source Impact Levels (ASIL) Summary List (WAC 173-460) 07/26/18

This is the 7/26/18 draft summary list of Acceptable Source Impact Levels (ASIL) in Chapter 173-460 WAC.

https://ecology.wa.gov/2018-draft-asil-list-wac-173-460-07-26-18

Microsoft MWH Data Center Expansion Tier 2 letter

This is the Microsoft MWH Data Center expansion Tier 2 toxics review letter.

https://ecology.wa.gov/20180717tier2ltr

Microsoft MWH Data Center Expansion HIA Recommendation

This is the Microsoft MWH Data Center expansion Health Impact Assessment recommendation document.

https://ecology.wa.gov/201807mwh_hiarecomm

Microsoft MWH Data Center Expansion PD

This is the Microsoft MWH Data Center expansion preliminary determination.

https://ecology.wa.gov/20180607mwh_pd2

Microsoft MWH Data Center 2nd Tier HIA

This is the 2nd Tier Health Impact Assessment for the Microsoft Data Center expansion in Quincy.

https://ecology.wa.gov/20180606mwh_hia

Microsoft MWH Data Center Notice of Construction Application

This is the notice of construction application submitted by Microsoft for the MWH Data Center in Quincy.

https://ecology.wa.gov/20180606mwh_noc