| References | Countries | Types of water intake | Radius of Zone 1 |
| [32] | Quebec | Lake and River | 300 to 1000 m |
| River | 200 to 500 m | ||
| [19] | Côte d’Ivoire | Lake | 100 m |
| [16] | Maroc | Lake | 100 m |
| [34] | Maroc | Lake | 100 m |
| [35] | France | Lake | Several tens to a hundred meters |