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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Fire Mountain Farms 2015 application form

2015 application for coverage under the general permit for biosolids management

https://ecology.wa.gov/2015-application-form

2015 Biosolids general permit

A PDF version of the Biosolids General Permit issued August 5, 2015 and in effect from September 4, 2015 to September 4, 2020.

https://ecology.wa.gov/2015-biosolids-general-permit

Minor source baseline dates by county

This is a spreadsheet of minor sources with baseline dates by county.

https://ecology.wa.gov/201502minorsourcebaselinecounty

2011 Comprehensive Emissions Inventory Categories Reference

This reference document summarizes the methods used to prepare the Washington 2011 County Emissions Inventory.

https://ecology.wa.gov/2011-comprehensive-emissions-inventory-categories

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 - 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

Sabey Intergate Data Center - Updated Health Impact Assessment

Updated Health Impact Assessment (Second Tier Review) Recommendation for Sabey Intergate Data Center, 3/3/15

https://ecology.wa.gov/updaterpt2ndtier

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

Microsoft Oxford Data Center - Notice of Construction application

Notice of Construction Application for Microsoft Oxford Data Center, 2/15/15

https://ecology.wa.gov/20150215oxfordnocapp

2015 Fact Sheet Sand and Gravel General Permit

The Fact Sheet serves as the documentation of the legal, technical, and administrative decisions Ecology has made in the process of reissuing the permit.

https://ecology.wa.gov/2015-fact-sheet

2014 Annual Report

2014 Willapa Bay Shellfish Z. japonica Annual Report

https://ecology.wa.gov/2014wag993008annualrpt

2014 Pretreatment Plan

2014 Willapa Bay Shellfish Z. japonica Pretreatment Plan

https://ecology.wa.gov/2014wag993008pretrtplan

2014 Annual Report

2014 Herrold Fish Oyster Z. japonica Annual Report

https://ecology.wa.gov/2014wag993009annualrpt

2014 Annual Report

2014 Heckes Clam Inc Z. japonica Annual Report

https://ecology.wa.gov/2014wag993010annualrpt

2014 Pretreatment Plan

2014 Heckes Clam Inc Z. japonica Pretreatment Plan

https://ecology.wa.gov/2014wag993010pretrtplan

2014 Pretreatment Plan

2014 Herrold Fish Oyster Z. japonica Pretreatment Plan

https://ecology.wa.gov/2014wag993009pretrtplan