Water as a Siting Constraint: From Afterthought to First-Order Variable
For a generation, water was the cheapest line on a data center's operating budget and nobody thought twice about it. That era is over. When a single hyperscale campus can evaporate the annual household supply of a small town, water stops being a utility bill and becomes a permitting fight, a headline, and a reason a county says no. I want you to internalize this early: the constraint is rarely the water molecule itself. It is the political, legal, and reputational structure wrapped around it. Learn to read that structure and you will site better than competitors still optimizing for power alone.
Knowledge check
Why is it misleading to evaluate a data center's water demand purely in terms of gallons available in a regional watershed?
Show the answer
Because physical availability is only one layer. The binding constraints are usually legal (water rights and allocation regimes), political (competition with agriculture and municipal users), and reputational (public scrutiny of consumption during drought). A watershed can be physically adequate yet legally or politically closed to a new large withdrawal.