That smoke in the Erie area near Colorado 52 and East County Line Road is a prescribed burn, and there is no reason to worry, officials say.

The Boulder County Sheriff’s Office Fire Management Team is conducting the prescribed burn, according to a Mountain View Fire Rescue post on Facebook.

There is no reason to call 911 for the smoke in the area, the post says.

Parts of the burn area have cattails, which make a lot of dark smoke when they burn, Mountain View spokesperson Rick Tillery said. Cattails, or typha, are a plant that grows near water.

Sheriff’s Office crews are on the scene monitoring the burn.