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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Clean Fuel Standard Cost-Benefit Analysis Report

This is an independent report of the cost-benefit analysis of the Clean Fuel Standard.

https://ecology.wa.gov/20220512cfscba

Microsoft MWH 2022 Notice of Construction Application

This is the 2022 air quality notice of construction application for Microsoft MWH in Quincy.

https://ecology.wa.gov/20220415microsoftmwhamendreqnocapp

Vantage Data Center Health Impact Assessment (Tier 2 review) letter, April 27, 2022

This is the April 27, 2022 health impact assessment (Tier 2 review) letter for Vantage Data Center.

https://ecology.wa.gov/20220427vantagetier2ltr