Only leaves, woody debris or brush less than 5 inches in diameter, or untreated wood and dimension lumber can be burned. For any open burning a written fire permit is required. Even with the permit, no open burning between the hours of 9:00 am and 5:00 pm unless it is raining (enough to use windshield wipers in the car).
Air quality regulations restrict the type of material burned in the open. Stumps, painted or treated lumber, tires, tubes, plastics, foam rubber and shingles are some of the prohibited materials.