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Water Basin
- Meuse >> Netherlands 16
- Rhine River >> Netherlands 16
- Rhine-Meuse 16
- General 13
- Colorado River 12
- Colorado 12
- Danube River >> Romania 11
- Danube 11
- Tijuana River 9
- Tijuana 9
- Saint Lawrence River >> Franklin County >> New York >> United States 8
- St. Lawrence 8
- Groundwater 7
- Rio Grande (North America) 6
- Rio Grande >> Mexico >> North America 6
- Rhone 5
- Rhône 5
- Neman 4
- Nemunas 4
- Oder River 4