Washington's air quality implementation plan

We have written a general cleanup plan for air called the State Implementation Plan (SIP). The plan describes how Washington carries out, maintains, and enforces national air quality standards — also known as National Ambient Air Quality Standards (NAAQS).

The State Implementation Plan 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.

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State Implementation Plan

Washington's implementation plan gives communities the tools to restore air quality to meet national air quality standards. The plans are put in place when an area fails to meet national air quality standards, such as for sulfur dioxide. Plans may be developed to attain or maintain air quality standards. They can result in rules and programs — like regional haze — to meet goals spelled out in a plan. Plans are continually updated with input from local clean air agencies and the public.

We send final plans to EPA for approval. Washington's State Implementation Plan (SIP) contains subsections addressing these topics:

Infrastructure – Plan to implement new or revised national air quality standards.
Rule – Rules are adopted into the plan to make sure we meet or exceed national air quality standards.
State air quality programs – These programs are required by the federal Clean Air Act. Some examples are:
- Motor Vehicle Inspection and Maintenance Plan (sunset Jan. 1, 2020)
- Regional Haze Plan (visibility protection)
- Smoke Management Program

Transportation conformity plans

We develop transportation conformity plans to make sure transportation activities meet national air quality standards. Transportation is a significant source of air pollution.

The State Implementation Plan process

Contact information

Anya Caudill
Environmental Planner
anya.caudill @ecy.wa.gov
360-791-5499

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Washington's air quality implementation plan

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State Implementation Plan

Attainment plans

Maintenance plans

Infrastructure, rule, and program plans

Transportation conformity plans

The State Implementation Plan process

Related links

Contact information