| Pollutant | Statistic | Observed Mean (µgm-3) | |||
| Period 1 | Period 2 | Period 3 | Period 4 | ||
| NO2 | Maximum 1-h value | 68 | 58 | 53 | 53 |
| Daily value | 37 | 28 | 27 | 27 | |
| PM10 | Daily value | 18 | 14 | 17 | 18 |
| O3 | Maximum 1-h value | 66 | 95 | 100 | 120 |
| Maximum 8-h value | 59 | 87 | 91 | 108 | |