Sacred springs in the spirit realm are being spoiled by dark, poisonous water. What is its source? Where is the dragon god who is said to protect these springs? And what is their connection to Yukari?
So it should be impossible 
for one to go bad in the first place.
لذا يُفترض أن يستحيل تلوث أحدها بالأصل
Darum ist es eigentlich gar nicht möglich,
dass die Quelle verunreinigt wird.
Así que es imposible
que uno pudiera contaminarse.
Así que es imposible
que uno haya podido contaminarse.
Il est littéralement impensable
que ce genre de chose arrive.
Perciò dovrebbe proprio
essere impossibile inquinarne una.
Portanto, em primeiro lugar, deveria ser
impossível que a fonte fosse contaminada.
Поэтому они в принципе
не могут испортиться.