Air quality affects public health, the environment, and quality of life. Air pollution causes lung disease, makes existing heart and lung disease worse, and is associated with cancer.

The Air Quality Program's goal is to safeguard public health and the environment by preventing and reducing air pollution. Washington's main sources of air pollution are motor vehicles, outdoor burning, and wood smoke.

Motor Vehicles
Find information about emission testing, diesel programs, the "clean car" law, no-idle programs, and other vehicle related issues.

Agricultural Burning
Find agricultural burning permit applications and daily burn decisions.

Outdoor Burning (Non-Agricultural)
Find out where outdoor burning is banned, what the law says, and what you can do instead of burning.

Indoor Burning (Wood Stoves, Fireplaces)
Learn which wood burning devices are legal in Washington, how wood smoke harms your health, and how to reduce wood smoke.

Air Monitoring
Find real-time air monitoring data and learn about the health effects of current air pollution levels.

Air Permits for Business and Industry
Find information about Air Operating Permits, General Orders of Approval, NOC, PSD, Tiers I, II, and III, and other commercial/industrial permits.

Air Emissions Inventory
Find information about the Large Business Emissions Inventory and the Source Test Manual.

Air Rules and Laws
Find information about current air quality rule making activities.

Regional Haze
Get information about Washington's Regional Haze SIP, BART, TransAlta, and Washington's Class I areas.

Nonattainment Areas
Learn how Washington is doing at meeting federal air quality standards.

Local Clean Air Agencies
Find the agency responsible for air quality in your county.