Daily air pollution levels and apparent (perceived) temperature*
| Percentile | Augsburg | Barcelona | Helsinki | Rome | Stockholm | |
|---|---|---|---|---|---|---|
| *Index of perceived temperature, combines measured temperature and relative humidity. | ||||||
| †Eight hour mean levels during warm season (April–September). | ||||||
| ‡Apparent temperature. | ||||||
| CO (mg/m3) | 25th | 0.7 | 0.6 | 0.3 | 1.7 | 0.3 |
| 50th | 0.9 | 0.9 | 0.4 | 2.3 | 0.4 | |
| 75th | 1.1 | 1.4 | 0.5 | 2.9 | 0.5 | |
| 98th | 2.2 | 3.2 | 0.8 | 5.2 | 0.9 | |
| NO2 (μg/m3) | 25th | 40.2 | 34.8 | 21.8 | 61.9 | 16.3 |
| 50th | 49.2 | 45.0 | 28.7 | 70.6 | 22.2 | |
| 75th | 58.9 | 60.0 | 37.6 | 80.4 | 28.6 | |
| 98th | 88.7 | 86.0 | 64.7 | 102.5 | 45.9 | |
| PNC (1/cm3) | 25th | 9720 | 48900 | 10500 | 35200 | 9130 |
| 50th | 12400 | 76300 | 13600 | 46000 | 11800 | |
| 75th | 16200 | 110000 | 17700 | 63300 | 15300 | |
| 98th | 31800 | 207000 | 29700 | 116000 | 27800 | |
| PM10 (μg/m3) | 25th | 31.1 | 45.1 | 15.1 | 36.0 | 9.4 |
| 50th | 43.5 | 57.4 | 21.0 | 48.5 | 12.5 | |
| 75th | 57.2 | 73.1 | 30.8 | 65.7 | 17.9 | |
| 98th | 100.0 | 114.8 | 74.8 | 104.2 | 36.9 | |
| O3† (μg/m3) | 25th | 62.6 | 50.0 | 57.6 | 95.3 | 65.4 |
| 50th | 82.6 | 63.3 | 69.8 | 114.4 | 77.2 | |
| 75th | 105.3 | 79.6 | 82.7 | 138.7 | 89.8 | |
| 98th | 151.6 | 106.0 | 110.8 | 200.5 | 119.5 | |
| App temp‡ (°C) | 25th | 0.4 | 10.4 | −2.6 | 7.7 | −1.4 |
| 50th | 7.7 | 15.1 | 2.5 | 15.1 | 4.1 | |
| 75th | 15.0 | 21.1 | 11.2 | 22.6 | 12.1 | |
| 98th | 21.8 | 28.3 | 18.4 | 28.8 | 19.9 | |