Table 3.
Distribution of PM2.5 and PM2.5 component concentrations (μg/m3) by three estimation approaches
| Approach |
PM2.5 |
EC |
OC |
Silicon |
Sulfur |
|||||
|---|---|---|---|---|---|---|---|---|---|---|
| Median | IQR | Median | IQR | Median | IQR | Median | IQR | Median | IQR | |
| Nearest monitor |
13.66 |
2.340 |
1.36 |
0.825 |
1.93 |
0.62 |
0.11 |
0.074 |
1.30 |
0.409 |
| Inverse-distance weighting (IDW) |
13.69 |
1.314 |
1.32 |
0.570 |
1.92 |
0.31 |
0.12 |
0.039 |
1.26 |
0.425 |
| City-wide average | 13.57 | 1.143 | 1.32 | 0.509 | 2.05 | 0.26 | 0.11 | 0.031 | 1.24 | 0.435 |
*PM2.5, particulate matter less than or equal to 2.5 μm in aerodynamic diameter; EC, elemental carbon; OC, organic carbon.