Critical Load/Level Values
- 1 day < 5 µg m-3
- 1 week < 0.5 µg m-3
- 1 month =< 0.2-0.3 µg m-3
- 3 months =< 0.2-0.3 µg m-3
Habitat/Ecosystem Type
all habitats
Description
Maximum allowable concentrations are specified for different exposure periods. They should be applied for the periods during the year when the leaves of sensitive species are expanding. The concentrations for 1 day and 1 week are reliable but those for 1 and 3 months are less certain.
Reliability
reliable i.e. a number of published papers of various studies show comparable results