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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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

CyrusOne Data Center Tier 2 letter

This is the tier 2 letter for CyrusOne Data Center.

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

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

CyrusOne Data Center Health Impact Assessment Recommendation

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

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

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

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

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

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

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

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

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