The graphs are based on the annual mean concentration values; they present the range of concentrations at all station types (in μg/m3) officially reported by the EU Member States and how the concentrations relate to the limit value set by EU legislation (marked by the red line).
The diagram indicates the lowest and highest observations, the means and the lower and upper quartiles. 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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Anything you pour down your drain, sink or toilet can eventually end up in our rivers or sea! Never dispose of liquids such as oils, grease, or hazardous liquids – like paint thinners or unused paint – by pouring them down the drain. Instead, collect them in one box and dispose with the rest of your waste. Keep them all in their individual packaging, to avoid possible chemical reactions. This will also make it easier for them to be identified during waste collection. If applicable, take them to your community collection point.
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