Table 1 Cumulative percentage of white, Hispanic, and black students at fixed distances from air pollution sources†.
| Buffer radius (miles) | % | % | % | % Difference | |
|---|---|---|---|---|---|
| White students | Hispanic students | Black students | Hispanic–white | Black–white | |
| TRI sites | |||||
| School | |||||
| 0.25 | 0.1 | 0.1 | 0.5 | 0.0* | 0.4* |
| 0.50 | 0.3 | 1.4 | 0.8 | 1.1* | 0.5* |
| 1.00 | 2.7 | 8.1 | 8.5 | 5.4* | 5.8* |
| 2.00 | 23.7 | 29.6 | 40.5 | 5.9* | 16.8* |
| 4.00 | 60.9 | 74.7 | 80.7 | 13.7* | 19.8* |
| Home | |||||
| 0.25 | 0.3 | 0.4 | 0.4 | 0.1* | 0.1* |
| 0.50 | 1.1 | 1.9 | 1.7 | 0.8* | 0.6* |
| 1.00 | 5.9 | 9.3 | 8.5 | 3.4* | 2.6* |
| 2.00 | 19.4 | 29.1 | 40.4 | 9.7* | 21.0* |
| 4.00 | 59.2 | 73.2 | 84.2 | 14.0* | 25.0* |
| AIRS facilities | |||||
| School | |||||
| 0.25 | 4.7 | 5.4 | 7.2 | 0.7* | 2.5* |
| 0.50 | 12.1 | 17.4 | 23.3 | 5.3* | 11.2* |
| 1.00 | 42.9 | 54.4 | 69.1 | 11.5* | 26.2* |
| 2.00 | 80.5 | 81.7 | 93.5 | 1.2* | 13.0* |
| 4.00 | 96.5 | 98.3 | 99.5 | 1.8* | 3.0* |
| Home | |||||
| 0.25 | 4.6 | 7.8 | 9.0 | 3.2* | 4.4* |
| 0.50 | 18.0 | 27.4 | 33.3 | 9.4* | 15.3* |
| 1.00 | 45.4 | 56.7 | 72.1 | 11.3* | 26.7* |
| 2.00 | 74.7 | 82.3 | 94.2 | 7.6* | 19.5* |
| 4.00 | 95.9 | 98.6 | 99.6 | 2.7* | 3.7* |
| Arterial roads | |||||
| School | |||||
| 0.25 | 38.3 | 45.7 | 45.7 | 7.4* | 7.4* |
| 0.50 | 62.1 | 66.7 | 72.2 | 4.6* | 10.1* |
| 1.00 | 82.8 | 91.7 | 92.6 | 8.9* | 9.8* |
| 2.00 | 94.3 | 97.2 | 99.0 | 2.9* | 4.7* |
| 4.00 | 100.0 | 100.0 | 100.0 | 0.00 | 0.0 |
| Home | |||||
| 0.25 | 37.9 | 47.9 | 46.3 | 10.0* | 8.4* |
| 0.50 | 63.3 | 77.3 | 79.3 | 14.0* | 16.0* |
| 1.00 | 83.5 | 93.8 | 96.7 | 10.3* | 13.2* |
| 2.00 | 95.7 | 98.4 | 99.4 | 2.7* | 3.7* |
| 4.00 | 99.9 | 100.0 | 100.0 | 0.1 | 0.1 |
AIRS, aerometric information retrieval system; TRI, toxic release inventory.
*p<0.001.
†z‐Test results.