Limit values (LV) for the protection of health
| Pollutant | Averaging interval | Assessment threshold [μg.m-3] | Limit value [μg.m-3] LV |
Margin of tolerance for 2008 [μg.m-3] MT |
Date for achieving LV | |
| Upper UAT |
Lower LAT |
|||||
| SO2 | 1 hour | — | — | 350 max. 24x/year |
— | — |
| 24 hours | 50 max. 3x/year |
75 max. 3x/year |
125 max. 3x/year |
— | — | |
| PM10 | 24 hours | 20 max. 7/year |
30 max. 7x/year |
50 max. 35x/year |
— | — |
| calendar year | 10 | 14 | 40 | — | — | |
| NO2 | 1 hour | 100 max. 18x/year |
140 max. 18x/year |
200 max. 18x/year |
20 | 31.12.2009 |
| calendar year | 26 | 32 | 40 | 4 | 31.12.2009 | |
| Pb | calendar year | 0.25 | 0.35 | 0.5 | — | — |
| CO | max. daily 8-h running average | 5 000 | 7 000 | 10 000 | — | — |
| Benzene | calendar year | 2 | 3.5 | 5 | 2 | 31.12.2009 |
The PM2.5 limit value set by the Directive of the European Parliament and of the Council No. 2008/50/EC of 21 May 2008 on ambient air quality and cleaner air for Europe (published in the EU Official Journal on 11 June 2008) is 25 μg.m-3.