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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2018 Modified Sand & Gravel General Permit

Sand & Gravel General Permit language modified 2018.

https://ecology.wa.gov/2018-modified-sand-gravel-general-permit

Response to comments 2018

This document is the response to public comment period held on the 2018 permit modification.

https://ecology.wa.gov/2018-response-to-comments

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

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

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

2018 EWA Formal Workshops Agenda

Agenda for the 2018 Formal Workshops and Public Hearings in Eastern WA

https://ecology.wa.gov/2018-ewa-formal-workshops-agenda

2018 WWA Formal Workshops Agenda

Agenda for the 2018 Formal Workshops and Hearings in Western WA

https://ecology.wa.gov/2018-wwa-formal-workshops-agenda

Comprehensive Planning Workshop Agenda

Agenda for the 2018 Comprehensive Stormwater Planning Workshop

https://ecology.wa.gov/20180913-comp-planning-agenda

Sept 13 2018 Comprehensive Planning Presentation

Presentation given at the Comprehensive Planning workshop in Tacoma, WA

https://ecology.wa.gov/2018-9-13-workshop-presentation

2017 Pretreatment Plan

2017 Coast Seafood Z. japonica Pretreatment Plan

https://ecology.wa.gov/2017wag993011pretrtplan

Coast Pretreatment plan for 2018

Annual pretreatment plan for Zostera Japonica control on commercial clam beds in Willapa Bay.

https://ecology.wa.gov/2018-pretreatment-plan-for-coast

2017 Pretreatment Plan

2017 Heckes Clam Inc Z. japonica Pretreatment Plan

https://ecology.wa.gov/2017wag993010pretrtplan