Meta data center water discharges suspended after contaminating the city’s reclamation water supply with bacterium — system offline for months for cleaning, closed-loop cooling system purge spread rare metal-resistant bacteria in Cheyenne’s water system
Microsoft and Nvidia market sealed liquid loops as a near-zero-water alternative to evaporative cooling, an approach that is spreading quickly as AI data centers expand into more communities. Microsoft describes cooling systems that are filled once during construction and then recirculate the same water, while Nvidia’s Rubin platform runs a coolant that is 75% water and 25% propylene glycol. That one-time fill, however, is the step that produces a discharge, and the flush water leaves the site before the loop is sealed.
Strong went on to add that the Board’s concern extends past the finding of the bacterium, because closed-loop systems can carry glycol and other chemicals that municipal treatment plants aren’t built to process. Cheyenne sprays its reclaimed water on parks, golf courses, and other green spaces, and the Board worried the bacterium could become an aerosol hazard during irrigation. Cupriavidus gilardii isn’t a regulated contaminant, yet the discharge disrupted treatment sufficiently to trigger pass-through and interference findings under the Cheyenne City Code and federal pretreatment rules.
Retired, living in the Scottish Borders after living most of my life in cities in England. I can now indulge my interest in all aspects of living close to nature in a wild landscape. I live on what was once the Iapetus Ocean which took millions of years to travel from the Southern Hemisphere to here in the Northern Hemisphere. That set me thinking and questioning and seeking answers.
In 1998 I co-wrote Millennium Countdown (US)/ A Business Guide to the Year 2000 (UK) see https://www.abebooks.co.uk/products/isbn/9780749427917
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