Summary of exposure data in 2003–2009
| Pollutant | Number of monitors | Median (IQR) | 10th–90th centile range |
|---|---|---|---|
| CO (mg/m3) | 61 | 0.2 (0.2–0.4) | 0.4 |
| NO2 (μg/m3) | 93 | 24 (13–37) | 45 |
| O3 (μg/m3) | 82 | 61 (46–76) | 61 |
| PM10 (μg/m3) | 62 | 20 (15–27) | 26 |
| PM2.5 (μg/m3) | 46 | 10 (7–15) | 16 |
| SO2 (μg/m3) | 71 | 3.1 (2–6) | 10.4 |
| Mean temperature (d/C) | 717 | 9.85 (6.2–13.9) | 13.85 |
CO, carbon monoxide; NO2, nitrogen dioxide; PM2.5, particulate matter less than 2.5 μm in aerodynamic diameter; PM10, particulate matter less than 10 μm in aerodynamic diameter; SO2, sulfur dioxide.