Spain is surrounded by water. But if they want to drink their own sewage by diverting a river which they dump all their sewage into, thinking it wouldn't be just as costly as desalinating sea water to make it potable ( I still wouldn't drink it) then more power to them.
There's something about drinking recycled sewage that appeals to leftist evirowienies.
All water is recycled sewage. Every single molecule of water has been through the hydrographic cycle billions of times. Evaporation and rainfall is nature’s way of recycling.
The issue is whether recycled sewage has been recycled thoroughly enough.