That may all be true, but the amount of water used by these data centers is miniscule, and it seems odd to focus on it. The article cites Microsoft using 700,000 liters for ChatGPT. In comparison, a single fracking well in the same state might use 350,000,000 liters, and this water is much more contaminated. There are so many other, more substantive, issues with LLMs, why even bring water use up?
Edit: If evaporative cooling uses less energy it might even be reducing total industrial water use, considering just how much water is used in the energy industry.