The City of Phoenix is the latest municipality seeking to treat wastewater and make it into drinking water. It comes as the state is working to formulate regulations to allow this kind of water to be used in taps. Once Phoenix’s facility is built and up and running, the goal would be to pump out 60 million gallons a day. ”It’s almost half of what we would normally serve for the Colorado River,” said Troy Hayes, water services director for the City of Phoenix. The city still has years to go to make the idea a reality, but is planning to start taking steps to get other cities involved, and mapping out what the likely multibillion-dollar facility would look like.