The Dalles data centers use a large fraction of the water supply of The Dalles because the data centers are extremely large and the town of The Dalles is of negligible size. It is also true that the paper mill of Valliant, Oklahoma uses 50 million gallons of water per day and that the town of Valliant, Oklahoma, population 819, uses less than 1% of that amount, so the paper mill can be said to be using > 99% of the local water supply but this is also a meaningless comparison.