PM2.5 emissions

Check Before You Burn This Season to Help Improve Air Quality

The seasonal air pollution prevention program extends from Nov. 1 through Feb. 28, 2019. During this four-month period, residents living in the South Coast Air Basin, including all of Orange County and the non-desert areas of Los Angeles, Riverside and San Bernardino counties, are asked to help improve Southern California’s air quality by not burning firewood on No-Burn Days.