Inter-urban comparison of ambient volatile organic compound concentration in U.S. cities.

Comparison of data from various cities in the United States concerning the levels of volatile organic compounds in the air and which ones perpetuate a significant health risk are given. It is noted that there are no federal standards for many of the compounds listed and that interpretation of findings can create problems and should be used with caution. It is also noted that while automobile exhaust emissions are not the only source of these compounds, they are the dominant source.