Record Display for the EPA National Library Catalog


Main Title Concentrations and Patterns of Photochemical Oxidants in the United States.
Author Tilton, B. E. ; Meeks, S. A. ;
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Environmental Criteria and Assessment Office.
Publisher Jan 89
Year Published 1989
Report Number ECAO-R-0223 ;EPA/600/D-88/239;
Stock Number PB89-136683
Additional Subjects Ozone ; Air pollution ; Pattern recognition ; Photochemical reactions ; United States ; Chemical analysis ; Atmospheric composition ; Nitrogen dioxide ; Sulfur dioxide ; Trends ; Public health ; Monitors ; Predictions ; Oxidants ; Risk assessment
Library Call Number Additional Info Location Last
NTIS  PB89-136683 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 22p
The report describes ozone and PAN levels at urban sites in the U.S., and of ozone at selected nonurban sites. Sample diurnal curves for ozone at suburban and nonurban sites are presented. Highest concentrations of both oxidants occur in California, where the second-highest 1-hr concentration of ozone in 1983 was 0.37 ppm, and the highest PAN concentration reported in this decade was 0.047 ppm, in 1980. At selected nonurban sites, maximum 1-hr ozone levels for 1978-1981 were about half the second-highest 1-hr ozone levels at urban sites in those years. Examples presented of temporal patterns of ozone show distinct seasonality at suburban versus nonurban sites, and point out potential implications for exposures to ozone of populations, vegetation, and other receptors. Data on co-occurrences of ozone with nitrogen dioxide or sulfur dioxide indicate relatively few such events at levels of potential concern for vegetation and public health.