Table 2.
Distribution of daily pollution concentrations from 2004 to 2010 and reported as median (25th–75th percentiles)
| Pollutant | Overall | Calgary | Edmonton | P-value |
|---|---|---|---|---|
| O3 (ppb) | 21.7 (15.0–28.3) | 19.3 (13.3–25.7) | 23.7 (17.5–30.9) | 0.2 |
| SO2 (ppb) | 1.0 (0.9–1.8) | 1.0 (1.0–2.0) | 1.1 (0.8–1.6) | <0.001 |
| CO (ppm) | 0.3 (0.2–0.4) | 0.4 (0.3–0.4) | 0.3 (0.2–0.4) | <0.001 |
| NO2 (ppb) | 12.7 (7.6–19.0) | 17.3 (13.0–23.5) | 7.9 (5.6–12.1) | <0.001 |
| PM2.5 (μg/m3) | 5.3 (3.5–7.7) | 6.0 (4.3–8.7) | 4.6 (3.1–6.6) | 0.2 |
| PM10 (μg/m3) | 18.1 (13.0–27.0) | 22.0 (15.0–32.0) | 15.8 (12.0–21.8) | <0.001 |
PPB parts per billion, PPM, parts per million, SO2 sulfur dioxide, NO2 nitrogen dioxide, CO carbon monoxide, O3 ozone, PM10 particulate matter with aerodynamic diameter of ≤10 μm, PM2.5 particulate matters with aerodynamic diameter of ≤2.5 μm