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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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

Vantage Data Center - Health Impact Assessment Recommendation

Health Impact Assessment (Second Tier Review) Recommendation, 11/30/12

https://ecology.wa.gov/b-updated-vantage-tier2-recommendation-11302012

Sabey Intergate Data Center - Health Impact Assessment letter

Health Impact Assessment (Second Tier Review) Letter for Sabey Intergate Data Center, 6/22/11

https://ecology.wa.gov/sabey-2ndtier-letter-to-karen-wood-06222011

Microsoft Oxford Data Center - Technical Support Document

Technical Support Document for Microsoft Oxford Data Center, 1/26/17

https://ecology.wa.gov/mwh-tsd-01262017

Vantage Notice of Construction Revised Tier 2

This is the Vantage Data Center's revised final 2012 Notice of Construction support document for Tier 2 review.

https://ecology.wa.gov/20121128nocrevtier2

Microsoft Oxford Data Center - Legal Notice

Legal notice for Microsoft Oxford, 11/3/16

https://ecology.wa.gov/mwh-legalnotice-11032016

Sabey Intergate Data Center - Health Impact Assessment

Health Impact Assessment (Second Tier Review) Technical Support Document for Sabey Intergate Data Center, 6/22/11

https://ecology.wa.gov/sabeyquincy-2ndtier-tsd-06222011-final

Yahoo Data Center - Notice of Construction permit

Notice of Construction permit for Yahoo Data Center, 3/28/11

https://ecology.wa.gov/yahoo-ord-11aq-e399

Vantage Data Center - Technical Support Document for Health Impact Assessment

Risk Analysis Technical Support Document for Health Impact Assessment (Second Tier Review) for Vantage Data Center, 11/28/12

https://ecology.wa.gov/a-revised-final-tier2-risk-analysis-vantage-112820

Yahoo Data Center - Technical Support Document for Health Impact Assessment

Technical Support Document for Health Impact Assessment (Third Tier Review) for Yahoo Data Center, 2/8/11

https://ecology.wa.gov/yahoo-tier3-tsd-2-8

Microsoft Oxford Data Center - Legal Notice

Legal notice for Microsoft Oxford Data Center, 10/6/16

https://ecology.wa.gov/mwh-legal-10062016

Vantage 2012 Notice of Construction Appendices

This document contains all the appendices for Vantage Data Center's notice of construction application from 2012.

https://ecology.wa.gov/20121018nocappendices

Microsoft Oxford Data Center - Health Impact Assessment letter

Health Impact Assessment (Second Tier Review) Letter for Microsoft Oxford Data Center, 9/27/16

https://ecology.wa.gov/mwh-tier2ltr-09272016

Microsoft Oxford Data Center - Health Impact Assessment (second revised)

Second Revised Health Impact Assessment for Microsoft Oxford Data Center, 9/27/16

https://ecology.wa.gov/mwh-hiarec-09272016

Microsoft Oxford Data Center - Draft Notice of Construction permit

Draft notice of construction permit for Microsoft Oxford Notice of Construction Application, 9/22/16

https://ecology.wa.gov/mwh-pd-09222016

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, 9/22/16

https://ecology.wa.gov/mwh-tsd-09222016

Microsoft Oxford Data Center - Completeness letter

Completeness determination letter for Microsoft Oxford Data Center

https://ecology.wa.gov/mwh-completeness-09202016

Microsoft Oxford Data Center - Request for revision of Notice of Construction permit

Request for revisions to Microsoft Oxford Data Center Notice of Construction permit, 4/8/16

https://ecology.wa.gov/mwh-noc-04082016-supp-09092016

Microsoft Oxford Data Center - Health Impact Assessment

Health Impact Assessment for Microsoft Oxford Data Center, 4/8/16

https://ecology.wa.gov/mwh-tier2hia-04082016