MAP: Boone County receives A grade for air quality

April 28, 2013 | 2:59 p.m. CDT
Columbia is one of the 25 cleanest cities in the U.S. regarding ozone pollution, and Boone County is the only county in Missouri that received an A for air quality, according to a report released April 24 by the American Lung Association. The map also shows counties with worst air quality in the state.