An air quality burn ban is a mandatory, yet temporary, order that restricts the use of wood stoves and fireplaces, as well as outdoor burning, when air quality is degraded and human health may be adversely impacted. Air quality burn bans typically occur during fall and winter months and may last for up to a week or more. They also may sometimes occur during the summer months if there is wildfire smoke.

For more information, visit our About Burn Bans page.

During a Stage 1 air quality burn ban:

• No burning is allowed in wood-burning fireplaces, uncertified wood stoves, or uncertified fireplace inserts unless this is your only adequate source of heat and you have an approved exemption.
• Even those using a certified device or those for whom this is their only adequate source of heat cannot generate visible smoke.
• All outdoor burning is prohibited, even in areas where outdoor burning is not permanently banned. This includes wood- and charcoal-fueled recreational fires.

During a Stage 2 air quality burn ban:

• No burning is allowed in ANY wood-burning fireplaces, wood stoves or fireplace inserts (certified or uncertified) or pellet stoves, unless this is your only adequate source of heat and you have an approved exemption.
• Even those for whom this is their only adequate source of heat cannot generate visible smoke.
• All outdoor burning is prohibited, even in areas where outdoor burning is not permanently banned. This includes wood- and charcoal-fueled recreational fires.

The Puget Sound Clean Air Agency has regulatory authority to issue air quality burn bans in King, Kitsap, Pierce, and Snohomish counties, in accordance with RCW 70.94.473.

The smoke from burning wood and wood-based products contains fine particles (soot) and a toxic mix of other carcinogens. This pollution is harmful to your health, particularly for young children, older adults and people with respiratory and heart disease. During stagnant weather conditions, concentrations of wood smoke can reach harmful levels, so we restrict wood smoke emissions to protect air quality in our neighborhoods and the health of those living there.

The Puget Sound Clean Air Agency calls air quality burn bans for King, Kitsap, Pierce, and Snohomish counties. Air quality burn bans for areas outside Puget Sound Clean Air Agency’s jurisdiction are issued by other local air agencies, the Washington Department of Ecology, or the U.S. Environmental Protection Agency.

We follow State Burn Ban Requirements:

We will issue Stage 1 air quality burn bans when weather conditions are predicted to create stagnant air and a build-up of fine particle pollution (PM_2.5) that:

• Exceeds a 24-hour average of 35 micrograms per cubic meter within 48 hours (King and Kitsap counties).
• Exceeds a 24-hour average of 30 micrograms per cubic meter within 72 hours (Pierce and Snohomish counties).

In some cases when PM_2.5 levels are rising rapidly, we may call a Stage 2 air quality burn ban without first calling a Stage 1 air quality burn ban.

Forecast weather conditions play a major role in determining when – or whether – to issue an air quality burn ban. For example, in certain circumstances when pollution levels have risen to the Stage 2 trigger, we may not issue an air quality burn ban if we expect that weather conditions over the next 24 hours will clean out our area’s air pollution.

We also issue these air quality bans based on the air quality conditions in the individual counties and in some cases sub-county areas within our jurisdiction. As a result, one or more counties or areas may have a Stage 1 burn ban in place while another county has advanced to a Stage 2 burn ban. Or one county may have a burn ban in effect while others have no restrictions in place.

The Agency issues air quality forecasts year-round to inform the public of expected conditions and health impacts based on EPA’s Air Quality Index.

We typically issue air quality burn bans on a county-wide basis. Our counties, however, have very diverse landscapes. Sometimes, one part of a county may experience stagnant weather conditions and elevated pollution levels, while in another part of the county, it’s windy and the air is somewhat cleaner.

We issue air quality burn bans when we expect air pollution to worsen. Sometimes the AQI may read “good” or “moderate” at the time we issue a ban; that means we anticipate that air pollution will build up soon. Pollution tends to build slowly during the day and is typically worst at night and early morning hours.