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 (PM2.5) 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 PM2.5 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.