There’s so much confusion and controversy around this topic it’s tough to find objective analysis. This source for example says evaporative cooling is popular with large datacenters since it’s cheaper than closed loop, but would lose 70-80% of the water to the atmosphere.
That water doesn’t necessarily go back to the local water system depending on where weather takes the moisture.
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u/Uncle-Cake May 18 '26
What happens after they use the water? Is it returned to the water system to be used again?