Event detail icon
Comment Period

Southwest Clean Air Agency Rule Changes

State Implementation Plan

March 13, 2023 - April 21, 2023, 11:59 p.m.

We propose to send EPA the revised air quality State Implementation Plan (SIP) to include Southwest Clean Air Agency's updated rules.

The revised SIP:

  • Removes Southwest Clean Air Agency's outdated rules
  • Adds their current rules

Documents for review and how to comment or request a public hearing:

Tentative public hearing:

(if requested by April 12, 2023)
April 19, 2023, 3 p.m. online

We will cancel the public hearing if we do not receive a request by April 12, 2023. We will update this webpage if the public hearing is cancelled. To comment or request a public hearing, use one of the ways listed.


State Implementation Plan is a general cleanup plan for air.  It describes how Washington carries out, maintains, and enforces national air quality standards.

The SIP explains how Washington will lower air pollution from sources like transportation, wood smoke, and industry. Sections of the plan are customized to meet regional air quality needs.

Comment by mail icon

Comment by mail

Jack Millard
Washington Department of Ecology
Air Quality Program
P.O. Box 47600
Olympia, WA 98504-7600
Questions icon


Jack Millard
Environmental Planner

To request ADA accommodation, contact Ecology's ADA Coordinator by email at ecyadacoordinator@ecy.wa.gov, or call 360-407-6831, 711 (relay service), or 877-833-6341 (TTY). More about our accessibility services.