| 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 |