| Variable | R2 | P | t | F | DW | ARMA | Result | 
| Air | 0.7364 | 0.0000 | 11.69 | 0.67 | 
 | OK | |
| Water | 0.4742 | 0.0000 | 8.19 | 0.19 | 
 | Weak | |
| Waste | 0.3468 | 0.0000 | 7.09 | 0.40 | 
 | Weak |