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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Microsoft Oxford Data Center - Health Impact Assessment Recommendation

Health Impact Assessment (Second Tier Review) Recommendation for Microsoft Oxford Data Center, 8/12/14

https://ecology.wa.gov/microsoftoxfordhiarecommendationupdated

Microsoft Oxford Data Center - Health Impact Assessment letter

Health Impact Assessment (Second Tier Review) Letter for Microsoft Oxford Data Center, 6/13/14

https://ecology.wa.gov/microsoftoxfordtier2letter-06132014

Microsoft Oxford Data Center - Notice of Construction application

Notice of Construction Application for Microsoft Oxford, 6/11/14

https://ecology.wa.gov/final-project-oxford-noc-rpt-06-11-14

Microsoft Oxford Data Center - Health Impact Assessment

Health Impact Assessment (Second Tier Review) for Microsoft Oxford, 6/11/14

https://ecology.wa.gov/final-project-oxford-risk-analysis-rpt-06-11-14

Microsoft Oxford Data Center Map

Map of proposed project location of Microsoft Oxford Data Center, 1/14

https://ecology.wa.gov/microsoftoxforddatacenter

Sabey Data Center Approval Order 20AQ-E22

This is the 2020 approval order for Sabey Data Center in Quincy.

https://ecology.wa.gov/20200916sabeydatacenterao20aqe22

Microsoft Columbia C06, Quincy, Preliminary Determination

This is the preliminary determination for the Microsoft Columbia expansion, C06.

https://ecology.wa.gov/20191209mscolumbiapd

Microsoft Columbia, Quincy, draft Technical Support Document

This is the draft technical support document for Microsoft Columbia's expansion, C06, in Quincy.

https://ecology.wa.gov/20191209mscolumbiadrafttsd

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 Approval Order Modification

This is the air quality approval order modification for Microsoft MWH in Quincy.

https://ecology.wa.gov/20191126mwhaomod

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

Schweitzer Engineering Labs (SEL) Health Impact Assessment Recommenation

This is the health impact assessment recommendation for Schweitzer Engineering Labs (SEL) in Pullman.

https://ecology.wa.gov/20190805selhia

Sabey Data Center 2020 Tier 2 letter & HIA Recommendation

This is the 2020 Tier 2 letter and Health Impact Assessment Recommendation for Sabey Data Center, Quincy

https://ecology.wa.gov/20200529sabeytier2hiarecomm

Microsoft MWH Preliminary Determination 19AQ-E031

This is the preliminary determination for the revision to Microsoft MWH Data Center's 2018 approval order.

https://ecology.wa.gov/201907mwhpd19aqe031

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

Sabey Data Center 2020 NOC App

This is the 2020 Notice of Construction Application for Sabey Data Center in Quincy

https://ecology.wa.gov/20200413sabeynocapp

Sabey Data Center 2020 Trinity HIA

This is the 2020 Health Impact Assessment by Trinity Consultants for Sabey Data Center in Quincy.

https://ecology.wa.gov/20200403sabeyhiatrinity

Vantage Data Center Health Impact Assessment (Second Tier Review) Recommendation, April 2022

This is the April 2022 Health Impact Assessment (Second Tier Review) Recommendation for Vantage Data Center.

https://ecology.wa.gov/202204vantagetier2rec