Puget Sound Clean Air Agency
Air Quality
Today's Forecast
King AQI:Good - Pollutant:PM2.5
Kitsap AQI:Good - Pollutant:PM2.5
Pierce AQI:Good - Pollutant:PM2.5
Snohomish AQI:Good - Pollutant:PM2.5
Cascade Foothills AQI:Good - Pollutant:PM2.5
King AQI:Good - Pollutant:OZONE
Kitsap AQI:Good - Pollutant:OZONE
Pierce AQI:Good - Pollutant:OZONE
Snohomish AQI:Good - Pollutant:OZONE
Cascade Foothills AQI:Good - Pollutant:OZONE
Forecast Discussion
Current Air Quality
Data and Reports
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Tips & Trivia
  • About 13% of our region's summertime ozone comes from gasoline-powered yard equipment. More.
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Photo: residential chimney smokeWashington State
Opacity Standards

Generating excessive smoke is not only un-neighborly, it's illegal. Under state regulations, smoke from your solid fuel burning device cannot exceed 20 percent opacity for six consecutive minutes. When a burn ban is in effect, it is illegal to generate any visible smoke at all (excluding the first 20 minutes of start-up). Violating smoke emission regulations could result in fines from the Puget Sound Clean Air Agency.

Excessive chimney smoke

Photo: Excessive chimney smoke, three panels, left = 20% (legal), middle = 40% (illegal), right = 80% (aggregious)




Additional resources

Washington Administrative Code, Section 173-433-110.

For tips on how to minimize smoke, visit “Burning Basics.”