This went into the weeds a little bit, but I've tried going over the figures again. I'm not sure if I'm missing something here or someone got some units wrong somewhere, but data centers seem to use far more water.

A medium size data center consumes 300k gallons of water per day [0]. That's over 400 million liters per year.

Even if we go with the highest estimate vidarh gave of 1.8 million liters per year for a full-size olympic size swimming pool, that's a tiny fraction of what a typical data center uses.

[0] https://www.eesi.org/articles/view/data-centers-and-water-co...