Table 6.
Overall and RUCC-stratified loadings for select variables in the air domain
|
Constructs indented |
Metropolitan - urbanized |
Non-metro urbanized |
Less-urbanized |
Thinly populated |
Overall |
|---|---|---|---|---|---|
| (RUCC1 = 1089) | (RUCC2 = 323) | (RUCC 3 = 1059) | (RUCC4 = 670) | (n = 3141) | |
|
Air Domain |
|
|
|
|
|
| Criteria air pollutants |
|
|
|
|
|
| Nitrogen Dioxide |
0.0613 |
0.1091 |
0.1014 |
0.0911 |
0.0848 |
| PM10 |
0.0845 |
0.0677 |
0.0627 |
0.0937 |
0.0897 |
| PM2.5 |
0.0701 |
0.1513 |
0.1281 |
0.1354 |
0.1036 |
| Hazardous air pollutants |
|
|
|
|
|
| Carbon disulfide |
0.1169 |
0.1140 |
0.1172 |
0.1261 |
0.1242 |
| Carbon tetrachloride |
0.0259 |
0.0281 |
0.0186 |
−0.0028 |
0.018 |
| Cyanide compounds |
0.1655 |
0.1674 |
0.1680 |
0.1497 |
0.1477 |
| Diesel engine emissions |
0.1545 |
0.1441 |
0.1431 |
0.1163 |
0.1321 |
| Dimethyl sulfate |
0.0472 |
0.1201 |
0.1024 |
0.1072 |
0.0942 |
| Lead compounds |
0.1366 |
0.0778 |
0.069 |
0.0581 |
0.1045 |
| PAH/POM |
0.1143 |
0.0822 |
0.1172 |
0.1192 |
0.1199 |
| Polychlorinated biphenyls |
0.0284 |
0.1300 |
0.0954 |
0.0779 |
0.0729 |
| Vinyl chloride | 0.1489 | 0.0997 | 0.1008 | 0.097 | 0.1257 |
Complete list of variable loadings is available in Additional file 3.