Figure 6a: Histogram of Maximum Daily 1-Hour Ozone Concentrations at Parry Sound, May 1 to September 30, 2001

Figure 6a displays the frequency of maximum daily 1-hour ozone concentrations at Parry Sound in various modal classes from May 1 to September 30, 2001: There were no data points less than 15 ppb. There were 6 data points between 15 and 24 ppb. There were 7 data points between 25 and 34 ppb. There were 52 data points between 35 and 44 ppb. There were 37 data points between 45 and 54 ppb. There were 33 data points between 55 and 64 ppb. There were 25 data points between 65 and 74 ppb. There were 8 data points between 75 and 84 ppb. There were 6 data points between 85 and 94 ppb. There were 5 data points between 95 and 104 ppb. There was 1 data point between 105 and 114 ppb. There was 1 data point between 115 and 124 ppb.