[Galaxity]

I don't understand why people keep saying Lake Mead when referring to water use. Technically the CAP canal come from Lake Havasu. But it's all from the Colorado River.

Regardless it's not the primary source of water. The majority of water for the Phoenix area comes from central Arizona rivers. The Salt river project, the Salt river and Verde, etc. You can see the big reservoirs to the east of Phoenix and from groundwater.