Air quality 2008: Caps for particulate matter exceeded once again
Loads low compared to previous year, yet no grounds for ‘all clear’ signal
The preliminary assessment of Germany’s air quality in 2008 made by the Federal Environment Agency (UBA) shows that the existing caps on the pollutants particulate matter and nitrogen dioxide (NO2) were also exceeded in 2008. Particulate matter concentrations at 19 of the total 421 measuring stations exceeded the caps (50 microgrammes/cubic metre air (µg/m3)) more frequently than the permissible 35 days. Furthermore, the PM10 limit value of 40 µg/m3, based on the annual mean value, was not complied with at the Stuttgart Neckartor measuring station. PM10 (particulate matter) refers to dust particles whose diameter is less than 10 micrometres; 10 µm is 10 millionths of a metre.