How is the local hydrologic cycle affected by the practice of drawing drinking water from a river and then returning sewage to the same river?

Can anyone please help?????? THANKS A LOT!!!!!

5 answers

Yucchh!

Unless the sewage is processed, then people are drinking what they've recently urinated and defecated.
You might get a kick out of this old song sung by Tom Lehrer.

http://www.youtube.com/watch?v=JPrAuF2f_oI
You really get a kick out of it if you live in San Jose.
But that version doesn't include the San Jose reference.
The breakfast garbage they throw into the bay,
Is drunk for lunch in San Jose.
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