Okay I feel like maybe I'm missing something. In a closed loop system, nothing evaporates. If you use an air cooled design, nothing evaporates.

If you use a hybrid design, you still evaporate ~80% of your cooling water - you just use less overall cooling water.

The water going back to the water cycle doesn't mean it's potable.

And yes, I do understand that it is a very small fraction of overall water use. I am actually in favor of using water where it will reduce electricity use. But let's not be inaccurate - the water used for cooling is absolutely evaporated or sent to sewage, with the exception of whatever sits inside the system's closed loop (which exists whether or not the system is cooled evap/dry/hybrid).