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You are here: Home / Data and maps / Maps and graphs / Trends in the maximum daily 8-hour O3 concentrations (in μg/m3) (2002–2011) per station type

Trends in the maximum daily 8-hour O3 concentrations (in μg/m3) (2002–2011) per station type

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The graph is based on the 93.15 percentile of the maximum daily 8-hour O3 concentration trends; it presents the range of concentration changes per year (in μg/m3) per station type. The trends are calculated based on the officially reported data by the EU Member States with a minimum data coverage of 75 % of valid data per year for at least 8 years out of the 10 years period. The diagram indicates the lowest and highest trends, the means and the lower and upper quartiles, per station type. The lower quartile splits the lowest 25 % of the data and the upper quartile splits the highest 25 % of the data.

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