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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VW federal settlement electric transit bus awards

Text version of Washington map showing where electric transit bus grant awards were dispersed

https://ecology.wa.gov/06122019vwfedelectransitbus

VW settlement funds distribution

An image showing how the VW settlement funds will be distributed

https://ecology.wa.gov/20190205vwsettlementfundsdistribution-alt

2018 School Bus Replacement Preliminary Application Criteria

A criteria supplement to the 2018 Clean School Bus Replacement Application.

https://ecology.wa.gov/2018schoolbusreplacementprelimappcriteria

2018 School Bus Replacement Preliminary Application

A preliminary application to apply for the VW state settlement grant for clean school bus replacement.

https://ecology.wa.gov/2018schoolbusreplacementprelimapplication

2018 Transit Bus Replacement Interest Form 2018

A preliminary application to apply for the VW state settlement grant for transit bus replacement.

https://ecology.wa.gov/2018transitbusreplacementinterestform2018

2019 Draft Acceptable Source Impact Levels (ASIL) Options (WAC 173-460) 02/14/19

This is a 2/14/19 spreadsheet of options to update the list of acceptable source impact levels (ASIL) in Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/2019-draft-asil-options-wac-173-460-02-05-19

2019 Draft Labeling Options (WAC 173-443) 12/17/19

This is a 12/17/19 draft document about options for labeling products and equipment in Chapter 173-443 WAC, Hydrofluorocarbons.

https://ecology.wa.gov/2019-draft-labeling-options-wac-173-443-12-17-19

CyrusOne Data Center Tier 2 letter

This is the tier 2 letter for CyrusOne Data Center.

https://ecology.wa.gov/20190425cyrusonetier2ltr

2019 Draft ASIL SQER Deminimis Values (WAC 173-460) 03/04/19

This is a table of options to update the list of acceptable source impact levels (ASIL), small quantity emission rates (SQER), and de minimis emission values in Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/2019-draft-asil-sqer-deminimis-values-wac-173-460

CyrusOne Data Center Health Impact Assessment Recommendation

This is the health impact assessment recommendation for CyrusOne Data Center.

https://ecology.wa.gov/20190425cyrusonetier2hiarec

2019 draft ASIL, SQER, de minimis emission values (WAC 173-460) 01/17/19

This is a spreadsheet of options to update the list of acceptable source impact levels (ASIL), small quantity emission rates (SQER), and de minimis emission values in Chapter 173-460 WAC.

https://ecology.wa.gov/20190107-drafttable

2019 Draft ASIL Summary List (WAC 173-460) 03/07/19

This is the 3/7/19 draft summary list of Acceptable Source Impact Levels (ASIL) in Chapter 173-460 WAC.

https://ecology.wa.gov/2019-draft-asil-summary-list-wac-173-460-03-07-1

CyrusOne Data Center Notice of Construction Application

This is the notice of construction application for CyrusOne Data Center.

https://ecology.wa.gov/20190219cyrusonenocappwithadd

2019 Draft Acceptable Source Impact Levels (ASIL) Summary List (WAC 173-460) 02/15/19

This is the 2/15/19 draft summary list of Acceptable Source Impact Levels (ASIL) in Chapter 173-460 WAC.

https://ecology.wa.gov/2019-draft-asil-summary-list-wac-173-460-02-15-1

CyrusOne Data Center Second-Tier Health Impact Assessment

This is the second-tier health impact assessment report prepared by Landau Associates for CyrusOne Data Center.

https://ecology.wa.gov/20181226cyrusonehialandau

2019 Final Table of Toxic Air Pollutants (WAC 173-460) 12/23/19

This is the 12/23/19 adopted table of toxic air pollutants listed in Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/tapstable122319

2019 Proposed Table of Toxic Air Pollutants (WAC 173-460) 06/03/19

This is the 6/3/19 proposed table of toxic air pollutants listed in Chapter 173-460 WAC, Controls for New Sources of Toxic Air Pollutants.

https://ecology.wa.gov/2019-proposed-table-of-toxic-air-pollutants-wac-1

Microsoft MWH FAQ Sheet

This is the general information and FAQ sheet for Microsoft MWH's 2018 permit revision.

https://ecology.wa.gov/20190601mwhfaqsheet

Microsoft MWH Technical Support Document for 19AQ-E031

This is the technical support document for Microsoft MWH's Data Center 2018 permit revision.

https://ecology.wa.gov/20190524mwhtsd19aqe031

Microsoft MWH NOC Application Approval Order amendment

This is the notice of construction approval order amendment request for Microsoft MWH.

https://ecology.wa.gov/20190508mwhnocapp