Figure 1   Ground level ozone formation

Figure 2   Ozone hours in the United Kingdom above 80 ppb 1987-1990

Figure 3   The influence of urban areas on the percentiles of the cumulative frequency distributions of 8-hourly running average concentrations reported for a trasect across southern England during 1984

Figure 4   Department of the Environment automatic ozone monitoring sites 1994

Figure 5   The maximum 8-hourly running average ozone concentration (ppb) recorded at individual sites between 1972 and 1991

Figure 6   The maximum 8-hourly running average ozone concentrations recorded each month for 53 sites operating within the period 1972-1992. (Based on 2238 values)

Figure 7   Number of days during 1990, a high ozone year, that the Expert Panel's recommended Standard was exceeded in the United Kingdom

Figure 8   A plot, for individual sites in any one year, of the maximum 8-hour running average ozone concentration against the number of days on which the Expert Panel's recommended Standard was exceeded. 1971-1990