Civil authorities in California are looking at ways to treat sewage water so that it will become potable water.
Fearing water shortages they are looking at a system to filter, chemical treatment, and UV light treatment to turn sewage into potable water. They say
this treatment will turn the "dirty" water into water that exceeds drinking water standards.
But, this water won't be re-introduced into your water pipes, but will be pumped back into the ground and re- introduced into the aquifer.
Toilet Water: Not Just for Cats Anymore
"Indirect potable water reuse," as it is called, is apparently an idea that's getting some serious attention in drought prone areas. Without
knowing exactly how citizens will react to this idea, city councils in San Jose and San Diego are both exploring it as an option. The process includes
chemicals, heavy scrubbing filters, and UV light, resulting in a product that management officials say exceeds drinking water standards. Even so, the
water doesn't go directly to the tap, instead
it's pumped underground to be eventually reintroduced into aquifers.
Whether or not it's a good idea to drink this water remains to be seen. The idea of pumping it into our pristine aquifers seems even more suspect.
I know that they can treat sewage water and make it drinkable, but I'm not too sure that pumping it back into the aquifers is such a good idea. What
happens if some sort of mishap occurs, then they could be pumping this "polluted" water into these "pristine" aquifers.
BUT in SA three orgs have the contract of
our water. Today they just brought in legislation preventing further Bore Water applications to ensure supply!! 
