PHOTO: Smoke from two fires in southern Pima County have periodically drifted to the Tucson area this week.
According to the Arizona State Forestry Service, the human-caused Espinosa Fire began Tuesday about seven miles north of Arivaca. The Encinos Fire began Wednesday about five miles west of the Espinosa Fire, but officials haven't said what caused it.
As of Friday afternoon, fire officials estimate the Encinos Fire at 7,500 acres and 25% containment, while the Espinosa Fire is at 1,800 acres and 20% containment. According to the Pima County Department of Environmental Quality, smoke from the wildfires is causing hazy skies over some parts of the Tucson area.
While there has been an increase in particulate matter measured in some parts of Tucson, the PDEQ says the air quality is still "good" or "moderate" for most of the area.