They could literally truck Evian water in if they wanted to. Water is extremely cheap compared to just about every substance on earth, and it’s hard to imagine that water costs can be a problem for this type of operation.
You're assuming that the severe undervaluing of natural resources in the US will simply continue. Try taking a field trip to a place (including the US), where people can't drink the water that comes out of their tap, and you'll get a better idea of where this leads. In no universe can TSMC use bottled water, much less Evian, and be competitive.
