The Technical Reality of Large-Scale Data Centers
Information on electrical demand, water consumption, noise, economic claims, and lifecycle.
Electrical Demand
Hyperscale and large-scale AI data centers are among the most electrically intensive land uses ever built. Power demand is continuous — 24 hours a day, 365 days a year — with no seasonal variation or off-hours reduction.
For context, the entire residential load of a small Florida county may be in the range of 200–400 MW at peak. A single hyperscale facility can approach or match that figure — drawing on the same regional grid infrastructure.
Required Infrastructure
Delivering this level of power to the Holder/Lecanto corridor — a rural area without existing high-capacity infrastructure — would require substantial grid investment:
| Infrastructure Component | Typical Requirement | Status |
|---|---|---|
| High-voltage substations | 1–3 new 230kV or 500kV substations | Not defined |
| Transmission lines | New lines from nearest substation to site | Not planned |
| Grid capacity study | Required before interconnection | Not required |
| Backup generation | Large diesel generators on-site | Unspecified |
| Residential rate impact study | Required to assess cost pass-through | Not proposed |
Water Consumption
Data centers require water primarily for cooling. The volume depends heavily on the cooling technology used. In Florida’s climate — hot and humid — evaporative cooling systems are less efficient, often requiring higher water volumes than in cooler, drier states.
At 100 MW of continuous load and an average Water Usage Effectiveness (WUE) of 1.8 liters per kWh, a facility would withdraw approximately 4.3 million gallons of water per day — roughly equivalent to the daily water use of a town of 35,000 people.
Evaporative Cooling
- Highest water consumption — hundreds of thousands to millions of gallons/day
- Efficiency degrades in humid climates like Florida
- Requires makeup water for evaporative losses
- More common in legacy and mid-scale facilities
Closed-Loop / Mechanical
- Lower water use than evaporative, but not zero
- Requires chillers and refrigerant systems
- Still requires heat rejection infrastructure
- Higher capital cost — may not be proposed
The Floridan Aquifer Risk
Citrus County’s water supply depends on the Floridan Aquifer System — one of the most productive aquifer systems in the world, but already under management pressure across Florida.
| Concern | Relevance to Citrus County | Current Safeguard |
|---|---|---|
| Aquifer drawdown | Sustained high-volume withdrawal can lower water table | None proposed |
| Agricultural competition | Citrus groves and farmland depend on same aquifer | Not studied |
| PFAS / chemical risk | Some cooling chemicals are persistent contaminants | Not addressed |
| Stormwater impact | 800+ acres of clearing alters drainage and recharge | Partial review |
| Long-term sustainability | Decades-long withdrawal commitments | No cap defined |
Noise Profile
Noise from industrial data centers is continuous, multi-source, and includes a low-frequency component that behaves differently from ordinary mechanical noise — traveling farther, penetrating structures more easily, and resisting attenuation by standard buffer distances.
Noise Sources
| Source | Type | Frequency | Characteristic |
|---|---|---|---|
| Cooling tower fans | Mechanical | Broadband + LF | Continuous |
| Chillers & compressors | Mechanical | Low frequency | Continuous |
| Backup generators | Combustion | Broadband | Periodic (testing) |
| High-load transformers | Electrical hum | 60 Hz / harmonics | Continuous |
| HVAC systems | Mechanical | Broadband | Continuous |
Why Low-Frequency Noise Is Different
Standard noise ordinances measure A-weighted decibels (dBA) — a scale that de-emphasizes low frequencies, making them poorly suited to regulating the noise profile of data centers.
How It Travels
- Attenuates far more slowly than higher-frequency noise
- Can be perceptible hundreds of meters from the source
- Travels through ground and structural materials
- Not effectively blocked by standard earth berms or fencing
Health Associations
- Sleep disturbance at levels below conscious audibility
- Vibration-induced annoyance and stress responses
- Headaches and concentration difficulties in sensitive individuals
- WHO recognizes LFN as an under-regulated environmental concern
Economic Reality
Developer economic projections for data centers typically present headline job and tax figures that require scrutiny. The full economic picture — including infrastructure burden, incentive structures, and the jobs-per-acre reality — often tells a different story.
Claimed vs. Realistic Figures
| Metric | Developer Claim | Industry Reality |
|---|---|---|
| Construction jobs | ~2,500 | Temporary — typically 18–36 month window |
| Permanent jobs | ~825 | High automation; many facilities operate with 50–200 staff long-term |
| Property tax revenue | ~$105M | Depends heavily on tax incentives / abatements (often substantial) |
| Jobs per acre | ~0.6/acre | Very low compared to other industrial and commercial uses |
| Local supply chain benefit | Unspecified | Data centers purchase power, bandwidth, and hardware — often nationally/globally sourced |
The Jobs-Per-Acre Problem
Data centers deliver high capital investment but low employment density relative to the land they permanently consume. Communities that have approved similar projects often find, 10–15 years later, that the promised economic transformation did not materialize — while the infrastructure obligations and land use changes remain.
Lifecycle & End-of-Life
Data centers are not permanent institutions. They have defined technological lifespans, and the communities that host them inherit the decommissioning challenge when the economics change. This is rarely discussed at the approval stage.
What happens at end-of-life is never discussed at approval — but it should be. Without a required remediation bond or end-of-life plan, Citrus County taxpayers may bear these costs.
Use These Facts — Make Your Voice Heard
These technical realities should be part of every public comment and every planning board conversation. The rezoning vote is the only moment the community has full leverage.