Amazon Web Services has pulled out of its long-planned role as future operator of the Project Blue data center complex on the Tucson area’s far southeast side, three sources told the Star. Amazon has left the embattled project because its operations aren’t compatible with the project’s recently announced plans to use air cooling instead of water cooling of the data centers’ servers. … Project Blue officials had pledged to build a $100 million pipeline to deliver reclaimed water to the data centers. But outside critics said the city would be unable to effectively enforce those and other water-related requirements for the project, including a commitment by the company to be “water positive.” 

Other data center water use news:

• Arizona Luminaria (Tucson): Pima County rejects health review as Project Blue land sale nears closing
• KUTV (Salt Lake City, Utah): Washington County issues new water policy for large water users