Poor air quality along the Wasatch front has prompted a health warning and triggered wood-burning bans in a half-dozen counties through Tuesday. The Utah Division of Air Quality issued an âorange,â unhealthy grade on Monday for Sale Lake, Davis, Utah, Cache, Duchesne and Uintah counties. The National Weather Service says cold temperatures have trapped the pollution in valleys where little relief is expected until another front moves in toward the end of the week. Health officials are urging the ...