| Mean (SD) | IQR | SPM | NO2 | SO2 | Ozone | CO | Temperature | Relative humidity | ||
---|---|---|---|---|---|---|---|---|---|---|---|
All day | Daytime (8Â am to 7Â pm) | Nighttime (8Â pm to 7Â am) | |||||||||
SPM (μg/m3) | 26.8 (18.3) | 27.5 (18.4) | 26.1 (18.1) | 20.6 | 1 | 0.41 | 0.50 | 0.06 | 0.35 | 0.23 | 0.00 |
NO2 (ppb) | 17.1 (8.1) | 15.9 (7.9) | 18.3 (8.2) | 11.1 |  | 1 | 0.40 | −0.40 | 0.63 | −0.26 | 0.20 |
SO2 (ppb) | 3.0 (2.5) | 3.7 (3.0) | 2.3 (1.7) | 2.3 |  |  | 1 | 0.26 | 0.19 | 0.22 | −0.31 |
Ozone (ppb) | 25.9 (17.9) | 33.8 (18.5) | 18.1 (13.1) | 25.8 |  |  |  | 1 | −0.31 | 0.36 | −0.65 |
CO (ppm) | 0.6 (0.3) | 0.6 (0.3) | 0.6 (0.3) | 0.3 |  |  |  |  | 1 | −0.17 | 0.17 |