Table 2 Comparing potential exposure at school and home locations: cumulative percentages of students at fixed distances from air pollution sources†.
| Buffer | % White students | % Hispanic students | % Black students | ||||||
|---|---|---|---|---|---|---|---|---|---|
| (miles) | School | Home | Difference | School | Home | Difference | School | Home | Difference |
| TRI sites | |||||||||
| 0.25 | 0.1 | 0.3 | −0.2* | 0.1 | 0.4 | −0.3* | 0.4 | 0.4 | 0.0 |
| 0.50 | 0.3 | 1.1 | −0.8* | 1.4 | 1.9 | −0.5* | 0.8 | 1.7 | −0.9* |
| 1.00 | 2.7 | 5.9 | −3.2* | 8.1 | 9.3 | −1.2* | 8.5 | 8.5 | 0.0 |
| 2.00 | 23.7 | 19.4 | 4.3* | 29.6 | 29.1 | 0.5* | 40.5 | 40.4 | 0.1 |
| 4.00 | 60.9 | 59.2 | 1.7* | 74.7 | 73.2 | 1.5* | 80.7 | 84.2 | −3.5* |
| AIRS facilities | |||||||||
| 0.25 | 4.7 | 4.6 | 0.1* | 5.4 | 7.8 | −2.4* | 7.2 | 9.0 | −1.8* |
| 0.50 | 12.1 | 18.0 | −5.9* | 17.3 | 27.4 | −10.1* | 23.3 | 33.3 | −10.0* |
| 1.00 | 42.9 | 45.4 | −2.5* | 54.4 | 56.7 | −2.3* | 69.1 | 72.1 | −3.0* |
| 2.00 | 80.5 | 74.7 | 5.8* | 81.7 | 82.3 | −0.6* | 93.5 | 94.2 | −0.7* |
| 4.00 | 96.5 | 95.9 | 0.6* | 98.3 | 98.6 | −0.3* | 99.5 | 99.6 | −0.1 |
| Arterial roads | |||||||||
| 0.25 | 38.3 | 37.9 | 0.4* | 45.7 | 47.9 | −2.2* | 45.7 | 46.3 | −0.6* |
| 0.50 | 62.1 | 63.3 | −1.2* | 66.7 | 77.3 | −10.4* | 72.2 | 79.3 | −7.1* |
| 1.00 | 82.8 | 83.5 | −0.7* | 91.7 | 93.8 | −2.1* | 92.6 | 96.7 | −4.1* |
| 2.00 | 94.3 | 95.7 | −1.4* | 97.2 | 98.4 | −1.2* | 99.0 | 99.4 | −0.4* |
| 4.00 | 100.0 | 99.9 | 0.1 | 100.0 | 100.0 | 0.0 | 100.0 | 100.0 | 0.0 |
AIRS, aerometric information retrieval system; TRI, toxic release inventory.
*p<0.01.
†z‐Test results.