<bold>Exhaust Emissions from Compact Cars</bold>

This paper presents an analysis and interpretation by the U. S. Public Health Service of the data obtained from a separate contract program to determine representative emission levels for imported, domestic, and total compact populations as compared to those for standard cars. To accomplish this purpose, the concentrations and mass levels of emissions of hydrocarbons, carbon monoxide, and oxides of nitrogen were measured for a variety of imported and domestic compact cars during operation on the road and on achassis dynamometer (California 7-mode cycle, hot start).