Table 2.
Daily concentrations of ambient air pollutants and weather variables in 24 cities across Canada (1998–2011).
| Air Pollutants & weather variables | Mean (SD) | Median | IQR | Range |
|---|---|---|---|---|
| PM2.5 (µg/m3) | 8.84 (6.50) | 7.06 | 6.63 | <1-98.15 |
| NO2 (ppb) | 16.48 (8.33) | 15.36 | 10.91 | <1-68.44 |
| O3 (ppb) | 20.87 (9.99) | 20.12 | 13.61 | <1-89.78 |
| Ox (ppb) | 19.38 (6.25) | 18.73 | 8.13 | <1-62.40 |
| Temperature (°C) | 7.36 (10.62) | 8.00 | 15.3 | −39.7–31.51 |
| Relative Humidity (%) | 72.22 (12.85) | 72.96 | 17.41 | 16.04–100 |
IQR, interquartile range; Ox, redox-weighted oxidant capacity of NO2 and O3.