Data Center Water Consumption
Data centers generate enormous heat that must be dissipated. The most common cooling method uses water — evaporative cooling towers that consume millions of gallons per day. As AI drives explosive data center growth, water consumption is becoming a critical issue. Data centers are being built in regions already facing water stress. A single large data center can consume as much water as a small city, competing with agriculture, residential use, and ecosystems for an increasingly scarce resource.
What people believe
“Cloud computing is environmentally efficient compared to on-premise infrastructure.”
| Metric | Before | After | Delta |
|---|---|---|---|
| Water per large data center | N/A | 1-5 million gallons/day | Industrial scale |
| Water per AI query vs search | ~0.3 mL (search) | ~3-15 mL (AI query) | +10-50x |
| Tech company water consumption growth | Stable | +20-30% annually | Accelerating |
| Data centers in water-stressed regions | Few | Growing rapidly | Increasing conflict |
Don't If
- •You're building data centers in water-stressed regions without alternative cooling
- •Your water reporting doesn't disclose per-facility consumption
If You Must
- 1.Use air cooling or liquid cooling instead of evaporative cooling where climate permits
- 2.Build in regions with abundant water and cool climates (Nordics, Pacific Northwest)
- 3.Disclose per-facility water consumption transparently
- 4.Invest in water recycling and treatment for cooling water
Alternatives
- Liquid cooling (direct-to-chip) — Uses 90% less water than evaporative cooling — becoming standard for AI workloads
- Nordic/cold climate locations — Free air cooling eliminates water use entirely — Iceland, Finland, Norway
- Waste heat recovery — Use data center heat for district heating — turns waste into community benefit
This analysis is wrong if:
- Data center water consumption decreases despite growing compute demand through efficiency improvements
- Data centers in water-stressed regions do not measurably impact local water availability
- Alternative cooling technologies eliminate water consumption for data centers at comparable cost
- 1.University of California: Making AI Less Thirsty
Research quantifying water consumption of AI training and inference at data center scale
- 2.AP News: Data Centers and Water
Investigation into data center water consumption in drought-affected communities
- 3.Google Environmental Report
Google's water consumption increased 17% in one year, driven by AI data center expansion
- 4.Microsoft Environmental Sustainability Report
Microsoft's water consumption increased 34% year-over-year, attributed to AI infrastructure growth
This is a mirror — it shows what's already true.
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