A hyperscale data center using evaporative cooling consumes roughly the same water as 10,000 to 30,000 Florida households. That number is not exaggerated — it's drawn from developers' own water permit applications, published industry data, and New York Times investigative reporting. Whether it matters for your county depends on your regional water management district and how close that district is to its sustainable yield.
The real numbers
- Average data center: ~300,000 gallons per day (equivalent to 1,000 homes), per Science and Environmental Health Network 2025 analysis.
- Typical hyperscale with evaporative cooling: 1 to 5 million gallons per day.
- Largest Atlanta-region demand: one facility demanded 9 million gallons per day — equivalent to ~30,000 households (Chris Manganiello, Chattahoochee Riverkeeper).
- Meta's Newton County, Georgia facility: approximately 500,000 gallons daily, roughly 10% of the county's total water consumption.
- Mansfield, Georgia Meta site: 200 million gallons per year (~548,000 gallons daily average).
- Bessemer, Alabama proposed facility: required 2 million gallons daily — one-third of the local utility's total water supply.
Why cooling choice determines water use
"Data center" is not one thing when it comes to water. The cooling system determines water consumption by an order of magnitude:
- Evaporative cooling (most water-intensive): cooling towers evaporate water to remove heat. 1-5 million gallons per day typical. Most water lost to atmosphere as vapor.
- Air cooling (much less water): powered fans move air through heat exchangers. Water consumption drops dramatically, electricity rises substantially.
- Liquid immersion cooling (newer): specialized fluids absorb heat directly from equipment. Lower water consumption but specialized fluids have their own considerations.
- Hybrid systems: combine methods — evaporative during hottest months, air cooling during cooler months.
Florida's hot humid climate makes pure air cooling less efficient than northern dry climates. Developers often default to evaporative or hybrid cooling for Florida facilities. This is the single most consequential design choice from a water-consumption standpoint.
Where Florida's water comes from
Most of Florida's drinking water is drawn from the Floridan Aquifer, one of the world's largest freshwater aquifers. Recharged by rainfall in central and northern Florida. The South Florida Water Management District — covering most population centers from Orlando south — already faces water supply constraints tied to Everglades restoration, saltwater intrusion, and population growth.
A hyperscale facility drawing 2-3 million gallons daily from an already-constrained water supply is a meaningfully different thing from the same facility drawing the same amount from the Suwannee River or Northwest Florida districts, which have more abundant water.
In Newton County, Georgia, Meta's data center consumes approximately 500,000 gallons per day — roughly 10% of the county's total daily water consumption. County water rates are rising 33% over two years, compared to typical 2% annual increases, partly to fund infrastructure upgrades. The Newton County Water and Sewerage Authority projects the county will reach water deficit status by 2030.
Source: Mike Hopkins, Newton County Water and Sewerage Authority, reported by the New York Times, July 2025.What SB 484 actually requires
SB 484, effective July 1, 2026, creates specific requirements for large-scale data center consumptive use permits:
- Applications must be treated as new initial applications, not rubber-stamped modifications
- Water management districts and the Florida DEP are authorized to require use of reclaimed water for a portion of the data center's allocation where feasible
- Approval without a public hearing is prohibited in specific circumstances
- Modifications to an existing permit trigger the same full review as a new application
The reclaimed water requirement is meaningful. If a developer is required to use treated reclaimed water instead of drawing from the drinking water aquifer, impact on residential water supply is reduced substantially.
What to ask at a water permit hearing
Each water management district governing board meets publicly. If water is your concern, this is the hearing to attend — often more consequential than the county commission hearing. Key questions:
- Total requested water allocation in gallons per day
- Source: surface water (lake, river), aquifer (which formation), or reclaimed water
- Cooling system design: evaporative vs. air vs. hybrid — determines peak summer use
- Will the developer use reclaimed water, and for what percentage? Under SB 484, the board can now require this.
- Impact on nearby wells? Application's hydrogeological analysis should address this. Read skeptically.
- Monitoring and reporting requirements after operation begins? Continuous reporting should be a condition.
If water is your concern, we built a personalized brief for you.
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Get Your Preparation Brief — $39The bottom line
Cooling choice is the biggest factor. A hyperscale facility with full evaporative cooling in South Florida is qualitatively different from the same facility using hybrid cooling with mandated reclaimed water in the Suwannee River district. Pulling the actual application through a Chapter 119 records request, reading the hydrogeological study, and engaging the water management district directly are the specific actions that shape the outcome. Florida now has the regulatory structure to require meaningful mitigation. Whether that structure gets used depends on whether homeowners show up to use it.
This guide is educational and not legal advice. Before taking action that may affect your property or your legal rights, consult a Florida-licensed attorney.