ANNEX II
Assessment thresholds
Section 1 – Assessment thresholds for health protection
Pollutant | Assessment threshold (annual mean, unless specified) |
PM_{2,5} | 5 μg/m3 |
PM_{10} | 15 μg/m3 |
Nitrogen dioxide (NO2) | 10 μg/m3 |
Sulphur dioxide (SO2) | 40 μg/m3 (24-hour mean)(1) |
Benzene | 1,7 μg/m3 |
Carbon monoxide (CO) | 4 mg/m3 (24-hour mean)(1) |
Lead (Pb) | 0,25 μg/m3 |
Arsenic (As) | 3,0 ng/m3 |
Cadmium (Cd) | 2,5 ng/m3 |
Nickel (Ni) | 10 ng/m3 |
Benzo(a)pyrene | 0,30 ng/m3 |
Ozone (O3) | 100 μg/m3 (maximum 8-hour mean) (1) |
Section 2 – Assessment thresholds for the protection of vegetation and natural ecosystems
Pollutant | Assessment threshold (annual mean, unless specified) |
Sulphur dioxide (SO2) | 8 μg/m3 (average between 1 October and 31 March) |
Oxides of nitrogen (NOx) | 19,5 μg/m3 |
(1) 99th percentile, i.e. 3 exceedance days per year.