| Pollution sources | Criteria | Weights (wi) |
| Sites of national interest (SIN) | C1 | 0.5831 |
| Cement plants | C2 | 0.2895 |
| Foundries | ||
| Incinerators, waste-to-energy plants | ||
| Petrochemical plants (including refineries) | ||
| Nuclear sites | ||
| Treatment and coating of metals industries | C3 | 0.0849 |
| Landfills sites | ||
| Waste treatment sites | ||
| Chemical industries | ||
| Thermal power plants (natural gas) | C4 | 0.0425 |
| Roads of major communication and urban areas | ||
| Commercial-industrial areas |