Let’s cut to the chase: it comes from the municipal water supply. That’s the same pipe system that feeds your bathroom sink, your toilet, and even the sprinklers at the local park.
There is no secret underground spring of “Fountain Water.” There is no magic pipe marked “F” for “Fancy.” It’s just your water, shipped to a convenient location.
But don’t let that ruin the magic. The real magic is that millions of gallons of safe, clean water travel through a hidden network of pipes, all so you can get a drink after a hot run without paying $4 for a plastic bottle.