Part 10/13:
Most impressively, nearly all indoor water — about 99% — is reclaimed and recycled. Wastewater undergoes extensive treatment involving multiple steps: removal of solids, bacteria, ammonia, and pathogens, culminating in water that's safe enough to be returned to Lake Mead or reused within the city. During the process, treated water reaches the “end product”: clean, reclaimed water that feeds back into the city's system, forming a closed loop driven by technological innovation and stringent regulation.