| Exposure of the population | General description |
| Low | Rural communities usually isolated population, could be far from generators foci. Less than 10,000 inhabitants |
| Moderate | Semi rural communities with concentrated population, may be moderate distances to generators foci. Between 10,000 and 75,000 inhabitants. |
| High | Urban communities with concentrated population may be at near distances to generators foci. Between 75,000 and 250,000 inhabitants. |
| Very High | Urban communities with highly concentrated population and can be very close distances to generators foci. More than 250,000 inhabitants. |