Table 2.
Distributions of 3-year average concentrations of air pollutants in 64 communities in China.
| Study Region | PM10 (μg/m3) | PM2.5 (μg/m3) | PM1 (μg/m3) | NO2 (ppb) |
|---|---|---|---|---|
| Guangdong | 80.32 (2.91) | 51.63 (2.67) | 37.39 (6.41) | 24.30 (4.87) |
| Hubei | 108.36 (2.37) | 67.64 (2.70) | 46.77 (6.71) | 31.52 (1.58) |
| Jilin | 74.70 (3.56) | 42.19 (1.85) | 39.80 (6.32) | 20.20 (4.73) |
| Shaanxi | 91.24 (19.35) | 48.84 (10.41) | 42.44 (12.00) | 24.40 (5.90) |
| Shangdong | 135.85 (14.25) | 71.28 (11.18) | 38.00 (10.86) | 32.60 (9.85) |
| Shanghai | 100.55 (1.12) | 69.68 (.77) | 60.25 (9.10) | 46.31 (1.60) |
| Yunnan | 47.10 (5.14) | 27.90 (4.99) | 37.70 (13.18) | 19.19 (3.49) |
| Zhejiang | 83.86 (11.40) | 50.96 (7.85) | 35.10 (12.60) | 26.96 (11.94) |
| Mean (SD) | 91.11 (28.95) | 54.02 (17.02) | 42.90 (13.13) | 28.97 (11.31) |
| Median (IQR) | 93.79 (31.15) | 55.62 (26.14) | 41.54 (24.12) | 24.18 (22.42) |
PM10: particulate matter with an aerodynamic diameter less than or equal to 10 μm; PM2.5: particulate matter with an aerodynamic diameter less than or equal to 2.5 μm; PM1: particulate matter with an aerodynamic diameter less than or equal to 1 μm; NO2: nitrogen dioxide. IQR was computed by subtracting the 25th percentile from the 75th percentile. SD: standard deviation; IQR: interquartile range.