Table 2.
Distribution of activity space size and fine particulate matter (PM2.5) concentration by township within Tulare County. SD—standard deviation; IQR—interquartile range.
| Variable | Visalia | Tulare | Porterville | p-Value |
|---|---|---|---|---|
| Annual mean PM2.5 (μg/m3) (SD) | 15.6 (1.1) | 14.17 (1.36) | 15.3 (1.63) | 0.98 |
| Emitter count (n) | 203 | 102 | 73 | <0.001 |
| Emitter density (emitters/m3) | 5.59 | 4.85 | 4.12 | 0.89 |
| Activity space-specific mean annual PM2.5 (μg/m3) (SD) | 16.64 (0.27) | 15.39 (0.41) | 16.52 (0.62) | <0.001 |
| Nocturnal location mean annual PM2.5 (μg/m3)(SD) | 16.05 (1.27) | 15.52 (0.63) | 16.33 (1.0) | 0.04 |
| Median emitters per activity space (emitters/m3) (IQR) | 11 (4–18) | 11 (2–14) | 3 (0–10) | 0.07 |
| Median activity space size (km)(IQR) | 6.96 (3.26–11.5) | 5.04 (1.02–9.43) | 3.02 (0.01–5.74) | 0.07 |