Even where grey water systems are deployed for water re-use, shower water /is/ normally collected, but piss would be so diluted as to be a negligable contaminant. A shower uses roughly 70 litres of water. An average human bladder voiding is 400ml, so that works out at 0.57% piss in the grey water collected in a single shower. Negligable.
in your country*
In any country, I would think.
Even where grey water systems are deployed for water re-use, shower water /is/ normally collected, but piss would be so diluted as to be a negligable contaminant. A shower uses roughly 70 litres of water. An average human bladder voiding is 400ml, so that works out at 0.57% piss in the grey water collected in a single shower. Negligable.
Piss away.
Source -Dr. I P Freely.