I would be really surprised if anyone is cooling data centres with city water except in emergency, that’s so unbelievably expensive (could see water direct from a lake though but that had it’s own issues too). I recall saving millions just by adjusting a fill target on an evaporative cooling tower so it wouldn’t overfill (levels were really cyclic, targets weren’t tuned for them), and that was only a fraction of what it’d have cost if we’d’ve used pure city.