eli5 Is there a reason the waste water like from showers can’t be filtered through pipes and used for toilet water?

Question

eli5 Is there a reason the waste water like from showers can’t be filtered through pipes and used for toilet water?

In: 797

Answer 1

“Grey water” is sometimes reused in places where clean water has to be trucked in, but not typically for places where you’d see or smell it.

If your dishwater ended up in your toilet that would be pretty nasty.