Table 4 Ambient exposure estimates derived from NAPS monitors within 50 km of residential postal codes and spatiotemporal exposure models.
Pollutant | N* | Mean | SD | Min | IQR | Max |
|---|---|---|---|---|---|---|
NAPS Measurements ≤ 50 km | ||||||
TSP (μg/m3) | 4027 | 60.0 | 16.9 | 22.3 | 21.4 | 114.1 |
Modeled PM2.5 (μg/m3)a | 4027 | 17.0 | 2.5 | 11.9 | 3.4 | 25.7 |
NO2 (ppb) | 3649 | 23.4 | 6.0 | 6.0 | 7.6 | 37.8 |
O3 (ppb)b | 4382 | 21.0 | 3.9 | 7.0 | 5.3 | 32.6 |
Spatiotemporal IDW Interpolation | ||||||
PM2.5 (μg/m3) | 6833 | 11.3 | 2.6 | 3.6 | 3.9 | 19.0 |
NO2 (ppb) | 6919 | 15.3 | 8.8 | 1.1 | 14.5 | 43.4 |
O3 b(ppb) | 6919 | 23.2 | 3.7 | 12.9 | 4.6 | 35.4 |
Linear Regression Models | ||||||
PM2.5 (μg/m3) | 6833 | 9.1 | 1.9 | 4.7 | 2.2 | 16.1 |
NO2 (ppb) | 6919 | 17.7 | 4.1 | 13.1 | 5.0 | 35.1 |
O3 b (ppb) | 6919 | 26.4 | 3.4 | 18.1 | 4.7 | 37.2 |