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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Wood-fired hydronic heaters that meet Washington standards, May 13, 2025

This is the May 13, 2025 list of wood-fired hydronic heaters that meet Washington standards.

https://ecology.wa.gov/20250422hydronicheaters

Presentation for September/October 2024 information sessions about grants for overburdened communities

This is the presentation for September/October 2024 information sessions about grants for overburdened communities.

https://ecology.wa.gov/202409obcgrantspresentation

Grant Application for Air Quality in Overburdened Communities Grant: Frequently Asked Questions, October 15, 2024

This is the October 15, 2024 frequently asked questions (FAQ) about the grant application for Air Quality in Overburdened Communities Grant.

https://ecology.wa.gov/20241015overburdenedfaq

Public comments received about linkage (Spring 2023 – Fall 2024)

A link to comments received on linkage from Spring 2023 to present.

https://ecology.wa.gov/linkagecomments

H5 Data Center notice of construction (NOC) permit

This is the November 2024 air quality notice of construction permit (approval order) for H5 Data Center in Quincy.

https://ecology.wa.gov/20241126h5nocpermit

Microsoft Columbia Data Center notice of construction (NOC) application

This is the air quality notice of construction application for Microsoft Columbia Data Center in Quincy.

https://ecology.wa.gov/20241001mscolumbianocapp

Public comments on Cap-and-Invest linkage (Jan. 31-May 15, 2023)

Document with all comments received about linkage from Jan. 31 to May 15, 2023

https://ecology.wa.gov/linkage_comments_spring2023