Research & Data

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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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Research & Data

Use this portal to filter and search for all of our scientific information.

Research & Data icon

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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Air quality
2017 and 2018 air quality days
A color coded chart showing the air quality days from good to very unhealthy for 2017 and 2018.
https://ecology.wa.gov/2019aqigraphic1718-alt
Table of ASIL, SQER, and de minimis emission values – WAC 173-460-150 (Effective 12-23-2019)
This is the 12/23/19 sortable table of toxic air pollutants (TAPs) listed in Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.
https://ecology.wa.gov/table-of-asil-sqer-and-de-minimis-emission-value
How can I protect my health at different AQI values
A color coded chart with numerical values telling what actions to take to protect your health during an air quality event.
https://ecology.wa.gov/2019aqigraphic-alt
Creating a SAW account for Washington Emissions Inventory Reporting System (WEIRS)
Instructions for creating a SAW account for Washington Emissions Inventory Reporting System (WEIRS)
https://ecology.wa.gov/20190723creatingsawweirsaccount
Washington Emissions Inventory Reporting System (WEIRS) Emissions Inventory Codes
Emissions Inventory Codes for Washington Emissions Inventory Reporting System (WEIRS), 12/20/19
https://ecology.wa.gov/20191220emissionsinventorycodes
Questions and Answers - Electric vehicle charging infrastructure along high-traffic corridors
Information on grant opportunities to add electric vehicle charging infrastructure on major transportation corridors in Washington.
https://ecology.wa.gov/20200107-vwfederalcorridorfaq
VW Federal Funds For Ferry
Alternate text for the graphic showing VW federal funds are going towards retrofitting a diesel ferry to electric hybrid
https://ecology.wa.gov/20191022-vwfederalfundsforferry-alt
VW Settlement - Q & A EV charging infrastructure at workplaces grants
Electric Vehicle Charging Infrastructure at State and Local Government-Owned Facilities
https://ecology.wa.gov/20191003-workplace-charging-grants
CyrusOne Data Center Approval Order 19AQ-E052
This is the air quality approval order No. 19AQ-E052 for the CyrusOne Data Center in Quincy.
https://ecology.wa.gov/20191023cyrusoneao19aqe052
Oath Approval Order No. 19AQ-E048
This is the 2019 air quality approval order for Oath Holdings in Quincy.
https://ecology.wa.gov/20190730oath19aq-e048
Vantage Data Center approval order 19AQ-E026
This is the approval order, technical support document, and response to comments for Vantage Data Center in 2019.
https://ecology.wa.gov/20190710vantagedatacenter19aqe026
Microsoft Columbia 2019 NOC Application
This is the 2019 air quality notice of construction application for Microsoft Columbia in Quincy
https://ecology.wa.gov/20191206microsoftcolumbianocapp
Microsoft Columbia C06, Quincy, Preliminary Determination
This is the preliminary determination for the Microsoft Columbia expansion, C06.
https://ecology.wa.gov/20191209mscolumbiapd
Microsoft Columbia C06, Quincy, NOC Application
This is the notice of construction application for Microsoft Columbia's C06 expansion
https://ecology.wa.gov/20191206mscolumbianocappc06
Microsoft MWH Data Center Approval Order & TSD 19AQ-E031
This is the 2019 approval order and technical support document for Microsoft MWH Data Center.
https://ecology.wa.gov/20190926microsoftmwhaotsd19aqe031
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