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PM2.5 levels too high in certain towns


4.4 To ensure safe air quality. Current knowledge indicates that air is safe to breathe if concentrations of pollutants are below the following limits: – Annual mean concentration of PM10: 20 μg/m3 – Annual mean concentration of PM2.5: 8 μg/m3 – Annual mean concentration of NO2: 40 μg/m3


Trends in annual mean concentration of PM2.5, focusing on places where levels exceed the levels considered to be safe

Are we moving in the right direction? Published by the Norwegian Environment Agency

The national air quality targets apply to the entire country, but pollution problems are greatest in towns. Measurements show that particular matter (PM2.5) is a problem in several towns in Norway.

The national target is exceeded in certain towns. PM2.5 levels are lower than before, but vary from year to year due to local meteorological variations.

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There are several reasons why PM2.5 levels exceed the national target. Long-range air pollution is the most important source of PM2.5 in towns where the target is exceeded. Wood-burning is normally the most important local source. Road traffic also contributes, as well as industrial emissions in some places.  

Future PM2.5 levels

Unless new measures against wood-burning are introduced, the national target will be exceeded in some towns in the coming years,

Furthermore, it is important that the international agreements against air pollution meet European targets, so that long-range air pollution is further reduced.