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History

PM10

Evolution of the number of monitoring stations where PM10 is measured, including both the telemetric stations and the stations used in specific studies. The number of PM10 monitoring stations in Belgium has risen from 20 in 1997 to 72 in 2016. Because the number of monitoring stations was considerably smaller in the first years, the uncertainty on the interpolated annual mean concentrations is greater in those initial years.

pm10_stations_2016

 

PM2.5

Evolution of the number of monitoring stations where PM2.5is measured, including both the telemetric stations and the stations used in the specific studies. The number of PM2.5 monitoring stations has risen significantly from 5 in 2000 to 72 in 2016. Because the number of monitoring stations was substantially lower in the first years, the uncertainty on the annual mean values is greater in these initial years. This is especially true for Wallonia where PM2.5 was not measured before 2008.

pm25_stations_2016

 

Ozone

Evolution of the number of monitoring stations where ozone is measured, including both the telemetric stations and the stations used in specific studies. The number of ozone monitoring stations has risen from 12 in 1990 to 41 in 2015. Since the number of monitoring stations in 1997 is substantially lower than in 2015, the uncertainty on the interpolated annual mean concentrations is larger in those initial years.

o3_stations_2016

 

Nitrogen Dioxide

Evolution of the number of monitoring stations where NO2is measured, including both the telemetric stations, stations used in specific studies and stations that are managed by the electricity producers and the Belgian Petroleum Federation in cooperation with the regional environmental administrations. The number of ozone monitoring stations has risen from 12 in 1990 to 41 in 2011 and did not evolve since then. Since the number of monitoring stations in the first years was substantially lower than more recently, the uncertainty on the interpolated annual mean concentrations is larger in those initial years.

no2_stations_2016

 

Sulfur Dioxide

Evolution of the number of monitoring stations where SO2 is measured, including both the telemetric stations, stations used in specific studies and stations that are managed by the electricity producers and the Belgian Petroleum Federation in cooperation with the regional environmental administrations. The number of SO2 monitoring stations has dropped from 81 in 1990 to 54 in 2016. In the years with fewer monitoring stations, the interpolated values have a larger uncertainty.

so2_stations_2016