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Distribution of stations by thresholds of the 93.15 percentile of the daily maximum of the running 8-h mean O3 concentrations for the year 2011. The chart is based on the 93.15 percentile of the daily maximum of the running 8-h mean O3 concentrations, corresponding to the 26th highest O3 concentration when data availability is 100% over the year.
Distribution of stations by thresholds of PM2.5 annual mean concentrations for the year 2011.