An evaluation of the indoor air quality in bars before and after a smoking ban in Austin, Texas

Indoor air quality and occupancy levels were investigated in seventeen bars , before and after the smoking ban that took effect on September 1, 2005 in Austin, Texas. Number of occupants, number of lit cigarettes, temperature, relative humidity, room volume, PM 2.5, CO and CO2 concentrations have been measured for that study. Results and conclusions are presented.