The World Federation One Stop Fiqh

Ruling 49

If an intrinsic impurity like blood or urine comes into contact with water and changes its smell, colour, or taste, then even if it is kurr or flowing water it becomes impure. In fact, even if the smell, colour, or taste of the water changes by means of an impurity that is outside it – for example, an impure carcass that is lying by the side of the water changes the water’s smell – then based on obligatory precaution the water also becomes impure.