Never burn garbage, plastics, rubber products, painted or treated wood, or other prohibited fuels either indoors or outdoors. Give your fire plenty of air. Open the draft controls. A hot fire also prevents the buildup of creosote. Keep an eye on the thickness of the smoke coming from your chimney.
Opacity is a measurement of the degree to which smoke obstructs the view of objects behind it.
Don't bank down fires overnight and don't start fires when you intend to leave the house. Such fires smoulder, waste wood, produce little heat, and result in substantial quantities of air pollution If you see smoke from your chimney entering a neighbor's yard, take actions to alleviate the problem. You are responsible for the impact of your chimney smoke on your neighbors. There is a permanent ban on outdoor burning in the cities of Olympia, Lacey and Tumwater.