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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Titan Data Center Moses Lake Approval Order 15AQ-E616

This is the 2015 air quality permit approval order for Titan Data Center in Moses Lake.

https://ecology.wa.gov/20150520titan15aqe616

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

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

Sabey Intergate Data Center - Revised Health Impact Assessment

Revised Health Impact Assessment for Sabey Intergate Data Center, 11/16/15

https://ecology.wa.gov/revhistmt

Sabey Intergate Data Center - Draft Notice of Construction Technical Support Document

Draft Notice of Construction Technical Support Document for Sabey Intergate Data Center, 11/16/15

https://ecology.wa.gov/tsd111615

Sabey Intergate Data Center - Appendix E of Notice of Construction permit

Appendix E of Notice of Construction application for Sabey Intergate Data Center, 6/4/15

https://ecology.wa.gov/appxe

Yahoo Data Center - Health Impact Assessment letter

Health Impact Assessment (Second Tier Review) Letter for Yahoo Data Center, 2/17/16

https://ecology.wa.gov/yahoogenesistier2ltr02172016

Yahoo Data Center - Health Impact Assessment

Health Impact Assessment (Second Tier Review) for Yahoo Data Center, 2/17/16

https://ecology.wa.gov/yahoogenesishis02172016

Sabey Intergate Data Center - Request for revisions for Notice of Construction permit

Request for revisions to Notice of Construction permit for Sabey Intergate Data Center, 3/4/15

https://ecology.wa.gov/revrequestao030415

Vantage Data Center - Health Impact Assessment Protocol

Methods and procedures to follow for a Health Impact Assessment (Second Tier Review) for Vantage Data Center, 3/7/16

https://ecology.wa.gov/vantage-hia-protocol-030716ada

Yahoo Data Center - Draft Notice of Construction permit

Draft Notice of Construction permit for Yahoo Data Center, 2/5/16

https://ecology.wa.gov/yahoopd02052016

Yahoo Data Center - Draft Technical Support Document for Notice of Construction permit

Draft Technical Support Document for Notice of Construction permit for Yahoo Data Center, 2/5/16

https://ecology.wa.gov/yahoodrafttsd02052016

Vantage Data Center - Air Dispersion Modeling Protocol

Protocol and methods for air dispersion modeling for a Notice of Construction application for Vantage Data Center, 2/25/16

https://ecology.wa.gov/vantage-modeling-protocol-022516ada

Yahoo Data Center - Notice of Construction application

Notice of Construction application (revised) for Yahoo Data Center, 12/23/15

https://ecology.wa.gov/yahoorevisednoc12232015

Yahoo Data Center - Revised Risk Analysis

Risk Analysis for Yahoo Data Center (revised), 12/23/15

https://ecology.wa.gov/yahoorevisedriskanalysis12232015

Microsoft Oxford Data Center - Draft Notice of Construction permit

Draft Notice of Construction Permit for Microsoft Oxford Data Center, 5/14/15

https://ecology.wa.gov/draftpermit

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

Draft Notice of Construction Technical Support Document for Microsoft Oxford Data Center, 5/14/15

https://ecology.wa.gov/20150514oxforddrafttsd

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

Draft Notice of Construction Technical Support Document for Microsoft Oxford Data Center, 5/14/15

https://ecology.wa.gov/tsd

Microsoft Oxford Data Center - Health Impact Assessment letter

Health Impact Assessment (Second Tier Review) Letter for Microsoft Oxford Data Center, 5/13/15

https://ecology.wa.gov/20150513oxfordhialtr

Microsoft Oxford Data Center - Health Impact Assessment Recommendation

Health Impact Assessment (Second Tier Review) Recommendation for Microsoft Oxford Data Center, 5/13/15

https://ecology.wa.gov/20150513oxfordhiarec