Originally Posted by grolby
Urinating into water sources isn't a problem - your urine is going to be a lot more sterile than whatever source of water you happen to be using for a john at the time. No, no one wants to drink it, but you're not going to make any people or animals sick.
Actually, not true. In larger urban centres (the Thames is one of the most studied in this regard), there is a growing effect on aquatic animals (mainly fish) because of the amount of hormones (oestregen) in the water - a hormone exreted both naturally, and also present in the urine of those taking contraceptive medication.
This hormone, even in small amounts, is also thought to cause health problems in males in regards to fertility/testicular cancer....read a brief synopsis here:
http://i-mass.com/oems0901.html