Pollutant | Average time | EU (AQS, 2011) | U.S (U.S EPA, 2012) | WHO (WHO, 2006) |
SO2 (ppb) | 1 hour mean | 134 | 75 | - |
3 hours mean | - | 500 | - | |
24 hours mean | 47 | 140 | 8 | |
annual mean | - | 30 | - | |
NO2 (ppb) | 1 hour mean | 105 | 100 | 106 |
24 hours mean | - | - | - | |
annual mean | 21 | 53 | 21 | |
PM10 (µg∙m−3) | 24 hours mean | 50 | 105 | 50 |
annual mean | 40 | - | 20 | |
PM2.5 (µg∙m−3) | 24 hours mean | - | 35 | 25 |
annual mean | 25 | 15 | 10 | |
Ozone (ppb) | 1 hour mean | - | 120 | - |
8 hours mean | 40 | 75 | 50 |