What this really ignores is all the inland cities that use the same water source, one down-stream from the next, from the great lakes to the gulf of Mexico. I t

What this really ignores is all the inland cities that use the same water source, one down-stream from the next, from the great lakes to the gulf of Mexico. I toured one of those sewage treatment plants in 1993 (1). It remains one of the most beautiful visions of my life: clear water flowing over algea-covered wooden beams, glowing in the natural sunlight, no odor whatsoever. You can't make this stuff up. Civil engineers are amazing. Edit: also, as per my other comment, urine, in the voided stream, is not sterile, and even if it were, certainly contains all the building blocks for bacterial growth. (1) https://encrypted.google.com/maps/place/Johnson+County+Wastewater+%2F+Douglas+L.+Smith+Middle+Basin+Plant/@38.9262716,-94.6995754,15z/data=!4m5!3m4!1s0x0:0xae51517b7f17288!8m2!3d38.9262716!4d-94.6995754?sa=X&ved=0ahUKEwjJhPnR2sDQAhUIOSYKHdEABE8Q_BIIbzAK https://encrypted.google.com/maps/place/Johnson+County+Waste...