Data Centers: Power, Water and Heat – A Fresh Look
In a quiet Utah park one evening, a group of moms turned their attention to the buzz around a new data center. The conversation shifted from toddlers’ playtime to worries about heat, water use and electricity costs for a proposed 9‑gigawatt facility in Box Elder County.
What’s at Stake?
Data centers are the hidden backbone of everyday tech: they store photos, power online shopping, run voice assistants and stream shows. The proposed Stratos Project would be one of the biggest in the U.S., with a power capacity 90 to 225 times larger than an average center that uses 40–100 MW.
A recent poll shows more than half of Utah residents oppose the project, echoing broader concerns about environmental impact. Critics question whether the water required for cooling and power generation will strain local supplies, and whether the heat from such a large plant could raise regional temperatures.
Water Use: Myth vs. Reality
- Washington Post (2024) claimed a single ChatGPT email consumes an entire bottle of water, leading to estimates that billions of queries would use hundreds of millions of gallons daily.
- UC Riverside review counters that most of that water is used in power plants, not the data center itself. Modern AI models use far less water—often just a few milliliters per prompt.
Factors that influence consumption:
| Factor | Impact |
|---|---|
| Cooling method | Water‑intensive towers save electricity; air‑cooled systems may raise overall demand |
| Local climate | Cooler climates require less cooling |
| Energy source | Renewable vs. fossil fuel impacts water use in power generation |
| Equipment efficiency | Higher efficiency reduces cooling needs |
The Stratos Project’s developers estimate annual water usage between 500 and 1,100 acre‑feet (163–358 million gallons). The governor says this will be less than the region’s current use, but critics warn that even modest increases could affect local ecosystems.
Comparison: Data centers use roughly the same water as a medium‑sized brewery—about 0.14 % of national daily consumption. By contrast, a single walnut or hamburger requires several gallons, and Americans consume billions of burgers yearly, drawing massive water resources.
Thermal Impact
A physics professor’s rough calculation suggests that a 9‑GW natural gas plant could raise temperatures in the valley by 2–5 °F during the day and 8–12 °F at night, potentially eliminating overnight dew and frost that support local wildlife. This mirrors the urban heat island effect seen in cities, where infrastructure raises temperatures by up to 10 °F.
Electricity Demand & Costs
- Electricity demand from data centers grew modestly in recent years—about 4 % of national consumption in 2023.
- Some experts argue that the hype around AI is comparable to past tech bubbles, and that projected growth may be overstated.
- Utah has passed a law ensuring data center power is generated on site or imported without raising consumer rates. Studies elsewhere show that data centers typically add less than 0.1 % to residential bills, though some regions experience small increases.
Bottom Line
The Stratos Project could bring significant economic activity, but the environmental trade‑offs—especially in water use and heat generation—are at the heart of a growing public debate. Whether the benefits outweigh the costs remains to be seen.
