Summary of 24 hour (one day) and five day moving average air pollution concentrations
| Percentiles | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Average | Pollutant | n | Mean (SD) | Min | 25th | 50th | 75th | Max | IQR* |
| *IQR, interquartile range (75th–25th percentile). | |||||||||
| 1 day | PM2.5 (μg/m3) | 113 | 19.6 (10.4) | 3.6 | 11.7 | 17.7 | 25.0 | 48.4 | 13.3 |
| SO42− (μg/m3) | 109 | 6.8 (4.7) | 0.0 | 3.3 | 5.7 | 8.5 | 25.0 | 5.2 | |
| EC (μg/m3) | 103 | 1.1 (0.6) | 0.3 | 0.7 | 1.0 | 1.3 | 3.6 | 0.6 | |
| O3 (ppb) | 111 | 21.8 (12.6) | −0.8 | 12.0 | 20.2 | 28.5 | 74.8 | 16.5 | |
| NO2 (ppb) | 111 | 10.7 (6.7) | −0.9 | 6.3 | 9.6 | 14.0 | 37.9 | 7.7 | |
| SO2 (ppb) | 106 | 10.4 (8.3) | 1.8 | 5.2 | 8.1 | 12.4 | 58.3 | 7.2 | |
| CO (ppm) | 110 | 0.2 (0.3) | −0.1 | 0.0 | 0.1 | 0.3 | 1.5 | 0.3 | |
| 5 day | PM2.5 (μg/m3) | 107 | 19.8 (7.5 | 4.9 | 13.9 | 19.0 | 23.9 | 38.7 | 10.0 |
| SO42− (μg/m3) | 97 | 6.7 (3.1) | 1.5 | 4.2 | 6.1 | 8.4 | 14.8 | 4.2 | |
| EC (μg/m3) | 80 | 1.0 (0.4) | 0.4 | 0.7 | 0.9 | 1.2 | 2.2 | 0.5 | |
| O3 (ppb) | 101 | 22.2 (9.1) | 6.5 | 14.2 | 20.7 | 29.1 | 44.0 | 14.9 | |
| NO2 (ppb) | 98 | 10.5 (4.2) | 4.5 | 7.4 | 9.2 | 12.9 | 20.4 | 5.5 | |
| SO2 (ppb) | 103 | 10.7 (5.5) | 2.4 | 7.4 | 9.1 | 12.8 | 31.3 | 5.4 | |
| CO (ppm) | 106 | 0.2 (0.2) | 0.0 | 0.1 | 0.2 | 0.3 | 1.3 | 0.2 | |