Table 2.
Annual average concentrations of air pollutants estimated by LUR and roadway density around the home, resolved to the level of the postal code.
| Exposure metric | Mean | 5th percentile | Median | 95th percentile | Interquartile range |
|---|---|---|---|---|---|
| Pollutant | |||||
| NO2 (ppb) | 13.58 | 9.92 | 13.15 | 18.01 | 4.50 |
| SO2 (ppb) | 5.39 | 4.38 | 5.28 | 6.92 | 0.94 |
| Coarse PM (μg/m3) | 7.25 | 6.02 | 7.27 | 8.23 | 0.77 |
| PM2.5 (μg/m3) | 15.62 | 14.17 | 15.42 | 17.17 | 1.23 |
| Black smoke (10−5/m) | 0.75 | 0.61 | 0.75 | 0.87 | 0.11 |
| Roadways (km) | |||||
| Distance to bridge | 7.25 | 1.72 | 7.41 | 12.67 | 4.77 |
| Length of local roadways within 200 m of the home | 1.55 | 0.20 | 1.70 | 2.20 | 0.65 |
| Length of all roadways within 200 m of the home | 1.68 | 0.20 | 1.80 | 2.35 | 0.65 |