Tucson City Council rejects Project Blue data center amid intense community pressure
Tucson City Council rejects Project Blue data center amid intense community pressure

azluminaria.org
Tucson City Council rejects Project Blue data center amid intense community pressure - AZ Luminaria

Why don't they just use the clean and treated but 'non-potable' wastewater from sewerage plants?
It's not like the water disappears after it's done running through a cooling loop, it's just warm and discharged back into the sewer.
I'm not super informed on these systems, but looks like evaporative cooling does account for a lot of water consumption. Probably also explains why freshwater is used (to avoid mineral and other deposits.)
Because that would make sense, probably, and wouldn't directly harm anyone.