DATA CENTER SITING

Data center site selection: a groundwater availability due-diligence checklist

A step-by-step checklist for judging whether the aquifer under a proposed data center can supply its cooling water for 20–30 years — yield, drawdown, interference and permits.

By Argos Tellus · Updated October 1, 2026

KEY TAKEAWAYS

National water-stress maps are a screen, not an answer. Groundwater availability is decided by the specific aquifer, saturated thickness and neighboring wells under a parcel.
The core question is sustainable yield: the pumping rate the site can hold for the facility’s design life without drawing water levels below pump intakes or the aquifer’s usable thickness.
Pumping creates a cone of depression; when cones from your wells and your neighbors’ wells overlap, both lose water level. Interference has to be modeled, not assumed away.
Permit risk is as real as physical risk. In Texas, most groundwater is regulated by local groundwater conservation districts that can cap production.
A good assessment ends with a forward projection — expected water levels by year across the design life, with uncertainty — not a single pass/fail number.

Why groundwater due diligence matters for data centers

Large data center campuses can need hundreds of thousands to millions of gallons of water a day for cooling (see how much water AI data centers use). Where that water comes from wells — on site, or through a utility that pumps groundwater — the facility’s operating life depends on an aquifer that nobody can see and that changes slowly but persistently.

Unlike power, water cannot be wheeled in from across the country. If water levels fall, wells lose yield, pumps lose submergence, and production permits can tighten exactly when demand peaks in a drought. Those failures show up years after the land is bought, which is why they belong in site selection.

Step 1 — Identify the aquifer and its geometry

Start by establishing which aquifer (or aquifers) underlie the parcel and whether they are confined or unconfined. In Texas alone, sites can sit on the Edwards, Ogallala (High Plains), Gulf Coast, Trinity, Carrizo-Wilcox or Dockum aquifers, each with very different storage, recharge and water quality.

Depth to water and depth to the aquifer base (saturated thickness)
Confined vs. unconfined conditions — confined aquifers spread drawdown much farther
Transmissivity and storativity from pumping tests or regional studies
Water quality: total dissolved solids, hardness, and contaminants that affect cooling-water treatment

Step 2 — Read the historical water-level trend

Water-level records from nearby monitoring and production wells show whether the aquifer is stable, recovering or in long-term decline. A declining trend under existing demand is the strongest single warning sign: adding a large new user to an aquifer already in groundwater depletion accelerates the decline for everyone.

Look for seasonal swings (irrigation pumping), drought-year drops and recovery rates. These tell you how the aquifer responds to stress, which is what your facility will add.

Step 3 — Estimate sustainable yield for the design life

Sustainable yield is the maximum pumping rate that keeps water levels above a defined threshold — for example, a minimum saturated thickness or pump-submergence depth — for a target number of years. For a data center the target is the campus design life, typically 20–30 years, including expansion phases.

Yield is not just what a test well produced on day one. It depends on how far the cone of depression spreads, how much recharge the aquifer receives, and how other users’ pumping changes over the same period.

Step 4 — Model drawdown and well interference

Every pumping well lowers the water table around it in a cone of depression. Where cones from several wells overlap — your wellfield, a neighboring irrigator, a municipal system — the drawdowns add up. Interference is the most common reason a wellfield that looked adequate on paper underperforms in practice.

Map existing wells within the expected radius of influence and their pumping rates
Simulate drawdown from the planned wellfield at design pumping rates and at peak (drought) rates
Space and stage wells to limit self-interference, and schedule pumping across wells
Check drawdown at neighboring domestic and municipal wells — this is where community and legal risk arises

Step 5 — Check permits and groundwater rules

Groundwater law varies by state. In Texas, the rule of capture still applies except where a groundwater conservation district regulates production, and districts now cover most of the state (see Texas groundwater rules). District rules can set spacing requirements, production caps tied to acreage, and drought curtailments.

Confirm which district governs the parcel, what permits a large-volume well requires, how long permitting takes, and how the district’s desired future conditions for the aquifer could limit future production.

Step 6 — Project water levels forward and price the risk

The output of due diligence should be a forward projection: modeled water levels at the site by year across the design life, under expected and drought pumping, with uncertainty bounds. That projection supports the decision that matters — buy, buy with mitigation (reclaimed water, storage, closed-loop cooling, a smaller wellfield), or walk away.

Question	Evidence that answers it
Is the aquifer stable?	Multi-year water-level trend from nearby wells
Can it sustain our rate?	Sustainable-yield model over the design life
Will we hurt neighbors?	Interference / cone-of-depression model
Can we legally pump it?	District rules, permits, spacing and drought plans
Is the water usable?	Water-quality data vs. cooling treatment needs

Frequently asked questions

How do you assess water availability for a data center site?

Identify the aquifer under the parcel, review historical water-level trends, estimate sustainable yield for the facility’s design life, model drawdown and interference with nearby wells, confirm groundwater district rules and permits, and project water levels forward under normal and drought pumping.

What is sustainable yield?

The maximum pumping rate a well or wellfield can maintain for a target period without drawing water levels below a defined threshold, such as a minimum saturated thickness or the depth needed to keep pumps submerged.

Is a water-stress map enough for data center site selection?

No. Indices such as WRI Aqueduct average conditions over large basins. Two parcels in the same basin can sit on different aquifers with very different saturated thickness, trends and neighboring demand, so a site-level groundwater assessment is needed.

Can a data center use groundwater in Texas?

Yes, subject to the rules of the local groundwater conservation district where one exists. Districts can require permits, set well spacing and production limits, and curtail pumping during drought.

HOW ARGOS HELPS

Phreatic — groundwater availability

Aquifer-aware well placement, cone-of-depression and interference modeling, sustainable yield and 20-year water-level forecasts.

CARI — aquifer reasoning agent

A hydrogeology research agent for availability, drawdown risk and groundwater district questions.

SOURCES

Figures are taken from the primary sources above and dated as of the update shown. Concentrations are expressed in mg/L. Spot an error? Email support@argostellus.com.

RELATED GUIDES

Need a site-specific answer?

Argos models groundwater availability, drawdown and contamination for individual sites and portfolios.

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