NILU has studied the effect of aluminum production on the environment around Norwegian aluminum smelters by doing calculations and measurements since the early 1970s.
In this project, surface concentrations have been calculated for SO2, dust and fluorides, as well as the metal components listed in the emission permit close to the smelter in Årdal, Western Norway.
The calculations are based on a conservative methodology (CONDEP) and the emission inventories are taken from the emissions permit as a worst-case assessment.
The mapping provides answers as to whether there is a risk of certain pollution components being exceeded, or whether the emissions indicate ground concentrations below the current limit values.
For example, the results show that the limit values for SO2 around the plant will not be exceeded by a good margin.