Abstract
Since late 1962, the Division of Air Pollution of the U. S. Public Health Service has used a mobile air sampling laboratory to provide technical assistance and training to local air pollution agencies. The laboratory and the manual and instrumental methods used to measure SO2, NO, NO2, CO, CO2, total hydrocarbons, oxidants, aldehydes, soiling index, and total suspended particulates are described, as are data handling systems. In several cities various parallel sampling methods have been used to determine the effect of analytical methods on indicated concentrations of particular pollutants. The significance of the air quality data collected is discussed.