Q2 reports air quality has been adversely affected by smoke from wildfires across Big Sky Country, but rain over the last few days has helped wash some of that smoke from the air. As of Saturday, the air quality in Billings was considered “moderately unhealthy,” inching ever-closer to unhealthy levels. By Sunday, the air quality in the city and the surrounding area soared into the unhealthy range, according to the Montana Department of Environmental Quality. But by Monday, air quality continued to improve, largely due to the rain.