First off, most data centers use evaporative cooling systems, so there isn't any water left in the process to drink in the first place. Second, even if they did use a water cooling solution where water was circulated, it would be distilled to prevent bacteria growth. Which technically can be drunk.
The bacteria isnt the problem with circulating, its the specific minerals the water is exposed to. That said, if the method is evaporative the details of discharge and recirculation don't really matter. I was giving them the benefit of the doubt.
Minerals the water is exposed to? Circulated water doesn't come into contact with the dyes themselves. So there is no exposure. I'm not sure what you're talking about.
The water accumulates silica, magnesium and calium over time, making it too conductive to reuse endlessly for discharge purposes. Eventually you have to use new water
No. First off. If you're water cooling with tap water, which has all of those minerals in it already, which aren't harmful by the way, there is going to be problems. Second, using distilled water, which doesn't contain those minerals is the right way to water cool. It does not "accumulate" them.