Washington Revised Code Title 70A. Environmental Health and Safety § 70A.15.5010. Outdoor burning--Fires prohibited--Exceptions

(1) Containing garbage, dead animals, asphalt, petroleum products, paints, rubber products, plastics, or any substance other than natural vegetation that normally emits dense smoke or obnoxious odors. Agricultural heating devices that otherwise meet the requirements of this chapter shall not be considered outdoor fires under this section;

(2) During a forecast, alert, warning or emergency condition as defined in RCW 70A.15.6010 or impaired air quality condition as defined in RCW 70A.15.3580.