New data centers expected to demand 7 billion gallons of water a year "When you think about a town of like 190,000 people springing up, and the additional water demands of that, that's not insignificant, especially in the West, where our water resources are already so constrained," said Deborah Kapiloff, a policy advisor with the group. "Just about the one thing everyone in the West does agree on is that western communities need to find ways to do more with less water."