Trend in NO2 annual mean per station type

Notes:
The graph is based on annual mean concentration trends; they present the range of concentration changes per year (in μg/m³) per station type (urban, traffic, rural and other - mostly industrial). 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 of the 10-year 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.