Regulations & Permits

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

We oversee many state and federal laws designed to protect Washington's land, air, and water. See our laws, rules, & rulemaking page for more information about our current rules and rulemaking.

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CyrusOne Data Center Health Impact Assessment Recommendation

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

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

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 MWH Data Center Approval Order No. 20AQ-E005

This is the air quality permit No. 20AQ-E005 for Microsoft MWH Data Center in Quincy.

https://ecology.wa.gov/20200227mwhao20aqe005

Microsoft Columbia Approval Order No. 20AQ-E002

This is the air quality approval order 20AQ-E002 for Microsoft Columbia data center in Quincy.

https://ecology.wa.gov/20200206microsoftcolumbia20aqe002

Draft Washington regional haze plan four-factor analysis

Draft chapter Washington regional haze plan four-factor analysis

https://ecology.wa.gov/011121-draft-washington-regional-haze-plan-four-fa

Federal land managers - draft response to comments

Draft response to comments from federal land managers on proposed updates to regional haze plan.

https://ecology.wa.gov/011121-flm-response-to-comments-draft

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 MWH Data Center 18AQ-E024 response to comments

This is the response to public comments report for the Microsoft MWH Data Center 18AQ-E024

https://ecology.wa.gov/20181024mwh_rtc

Vantage Data Centers agreed order 18AQ-E043 and tech support doc.

This is the September 2018 agreed order and technical support for Vantage Data Centers in Quincy.

https://ecology.wa.gov/20180910vantagedatacenter18aq-e043

Sabey Intergate Data Center - Draft Notice of Construction permit

Draft notice of construction permit for Sabey Intergate Data Center, 11/16/15

https://ecology.wa.gov/prelim

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

Sabey Intergate Data Center - Health Impact Assessment letter

Health impact assessment (Second Tier Review) letter for Sabey Intergate Data Center, 11/16/15

https://ecology.wa.gov/2ndtierrev

Microsoft Columbia Data Center - Notice of Construction permit

Notice of Construction permit for Microsoft Columbia Data Center, 8/19/14

https://ecology.wa.gov/microsoft-columbia-noc

Microsoft MWH Data Center Expansion Approval Order 18AQ-E024

This is the Microsoft MWH Data Center Expansion 03/04/05/06 Approval Order 18AQ-E024

https://ecology.wa.gov/20181023mwh_ao18aq-e024

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

2020 regional haze overview presentation

An overview of the regional haze air quality process.

https://ecology.wa.gov/20201203-regional-haze-overview-presentation

CyrusOne Data Center Notice of Construction Application

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

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

Microsoft MWH Technical Support Document

This is the technical support document for Microsoft MWH Data Center's 03/04/05/06 expansion.

https://ecology.wa.gov/20181023mwh_tsd

Microsoft Columbia Data Center - Technical Support Document for Notice of Construction permit

Technical Support Document for Notice of Construction permit for Microsoft Columbia Data Center, 8/19/14

https://ecology.wa.gov/microsoft-columbia-tsd