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Comment Period

Northwest Clean Air Agency Rule Change

State Implementation Plan (SIP)

Nov. 12, 2019 - Dec. 29, 2019, 11:59 p.m.

Ecology is proposing to submit a revision of Washington’s air quality State Implementation Plan (SIP) to EPA.

This proposed revision would update parts of Northwest Clean Air Agency's rule that are in the State Implementation Plan. Northwest Clean Air Agency has adopted the rule.

Document for review:

Tentative public hearing:

If a public hearing is requested by Dec. 13, 2019, we will hold it:
  December 19, 2019, 11 a.m.
  Northwest Clean Air Agency (map to location)
  1600 South Second Street; Mount Vernon, WA  98273

You can request the public hearing by using the online comment form linked below. If we do not receive a request for a public hearing, we will cancel it and update this page.


State Implementation Plan (SIP) is a master plan to keep the air clean.  it describes how Washington implements, maintains, and enforces national air quality standards.

The State Implementation Plan is an overarching guidance that outlines the process for reducing air pollution from sources including transportation, wood smoke, and industry.  The plans are tailored and implemented to meet regional air quality needs.

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Comment online

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Comment by mail

Linda Kildahl
Washington State Department of Ecology
Air Quality Program
P.O. Box 47600
Olympia, WA 98504-7600
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Linda Kildahl
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.