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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Oath Approval Order No. 19AQ-E048

This is the 2019 air quality approval order for Oath Holdings in Quincy.

https://ecology.wa.gov/20190730oath19aq-e048

CyrusOne Data Center Tier 2 letter

This is the tier 2 letter for CyrusOne Data Center.

https://ecology.wa.gov/20190425cyrusonetier2ltr

CyrusOne Data Center Health Impact Assessment Recommendation

This is the health impact assessment recommendation for CyrusOne Data Center.

https://ecology.wa.gov/20190425cyrusonetier2hiarec

Vantage Data Center approval order 19AQ-E026

This is the approval order, technical support document, and response to comments for Vantage Data Center in 2019.

https://ecology.wa.gov/20190710vantagedatacenter19aqe026

Cowlitz County's Nov. 4, 2019 response to Ecology's questions

Information provided to Ecology in response to the agency's questions on a Supplemental Environmental Impact Statement for the proposed Northwest Innovation Works Kalama methanol plant.

https://ecology.wa.gov/2019-october-cowlitzcountyresponsetoecyquestions

CyrusOne Data Center Notice of Construction Application

This is the notice of construction application for CyrusOne Data Center.

https://ecology.wa.gov/20190219cyrusonenocappwithadd

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

2018WAG993013AnnualRpt

2018 Z. Japonica R&J Seafood Annual Report

https://ecology.wa.gov/2018wag993013annualrpt

2018WAG993011AnnualRpt

2018 Z. Japonica Coast Seafood Annual Report

https://ecology.wa.gov/2018wag993011annualrpt

2018WAG993010AnnualRpt

2018 Z. Japonica Heckes Clam Annual Report

https://ecology.wa.gov/2018wag993010annualrpt

2018WAG993003AnnualRpt

2018 Z. Japonica Long Island Oyster Annual Report

https://ecology.wa.gov/2018wag993003annualrpt

2018WAG993004AnnualRpt

2018 Z. Japonica Station House Annual Report

https://ecology.wa.gov/2018wag993004annualrpt

2018WAG993005AnnualRpt

2018 Z. Japonica Taylor Shellfish Annual Report

https://ecology.wa.gov/2018wag993005annualrpt

2018WAG993012AnnualRpt

2018 Z. Japonica Nisbet Annual Report

https://ecology.wa.gov/2018wag993012annualrpt

2018WAG993009AnnualRpt

2018 Z. Japonica Herrold Fish and Oyster Annual Report

https://ecology.wa.gov/2018wag993009annualrpt

2018WAG993007AnnualRpt

2018 Z. Japonica Northern Oyster Annual Report

https://ecology.wa.gov/2018wag993007annualrpt-1

2018WAG993008AnnualRpt

2018 Z. Japonica Willapa Bay Shellfish Annual Report

https://ecology.wa.gov/2018wag993008annualrpt

2018WAG993006AnnualRpt

2018 Z. Japonica Wiegardt and Sons Annual Report

https://ecology.wa.gov/2018wag993006annualrpt