| Pollutant | Limit values | Alert thresholds | |||
| 1 hour | 8 hour | 1 day | Annual | ||
| SO2, µg/m3 | 350 |
| 125 |
| 500 |
| NO2, µg/m3 | 200 |
|
| 40 | 400 |
| CO, mg/m3 |
| 10 |
|
|
|
| O3, µg/m3 |
| 120 |
|
| 240 |
| Benzene, µg/m3 |
|
|
| 5 |
|
| PM10, µg/m3 |
|
| 50 | 40 |
|
| PM2.5, µg/m3 |
|
|
| 24 |
|