Thirsty for Knowledge?

Ever wonder what is in the water BEFORE it is treated by our (drinking) water treatment plants? Do you ever think about the process water goes through to be purified prior to reaching your faucet?  Well, here is an illustration placed above a Carnegie Science Center's drinking fountain! As you press on the button to get a drink of water, the water in the above, clear tube begins to bubble as if you were drawing your drink from it or in this case, filling your AWARE bottle! How Cool!
Thanks Carnegie Science Center!