Will a Data Center Drain My Water Well?

A Texas Landowner’s Guide to Groundwater Ownership, the Rule of Capture, and Where You Actually Have Leverage When a Data Center Comes for the Water

Your well has produced clean water for as long as you have owned the place, maybe longer than anyone in the family can remember. Then a data center goes in a mile up the road, and you start reading about how much water these things drink. A large facility using evaporative cooling can pull enormous volumes of water day after day, and some of them get that water by drilling their own wells or by buying it from a landowner and piping it in. So you stand at your wellhead and wonder the obvious thing. If they pump that hard, does my well go dry, and if it does, is there anything I can do about it?

Here is the honest answer before the analysis, because it is not the answer most people expect. In Texas, you own the water under your land, but owning it is not the same as being able to protect it. Under a rule that has governed groundwater here for more than a century, a big new pumper can lawfully lower your well, and you usually cannot sue over it. Where a Texas landowner actually has leverage is not the courthouse. It is the groundwater district or the Edwards Aquifer Authority, and the time to use that leverage is early, before the permits are granted.

The practical lesson: you own the water, but the Rule of Capture is the reality

I have practiced water law in Texas for more than a quarter century, and I have watched a lot of landowners learn this lesson the hard way. They assume that because the water is theirs, the law will stop a neighbor from taking it. Texas law does not work that way, and the sooner you understand the two halves of it, the better your decisions will be.

The first half is ownership. You own the groundwater beneath your land, as real property, the same as the dirt. The second half is the Rule of Capture, and it is the half that surprises people. Ownership does not come with a right to be free from your neighbor’s pumping. A landowner is generally entitled to pump all the water he can, for any purpose, even if it drains the well next door. Put those two halves together and you get the practical truth of this guide: your protection against a data center’s water use almost never comes from suing the pumper. It comes from the agency that regulates pumping in your area, and from getting involved before the big new permits are approved.

You own the groundwater under your land

Start with the good part, because it is real and it matters. In Texas, groundwater beneath the surface is the private property of the surface owner unless it has been severed, and the Legislature has said so directly. Section 36.002 of the Texas Water Code recognizes that a landowner owns the groundwater below the surface of the land as real property. The Texas Supreme Court confirmed that this is a vested ownership interest, owned in place beneath your land much like oil and gas, in Edwards Aquifer Authority v. Day, 369 S.W.3d 814, 832 (Tex. 2012).

Two things follow from real ownership. First, your groundwater is an asset you can sell or lease separately from the surface, which is exactly why data center developers and their water brokers sometimes approach landowners to buy or lease the water, not the land. Second, because it is a constitutionally protected property right, a regulator that cuts your own right to pump too far can owe you compensation for a taking. Day held as much. That protects you against over-regulation of your water, though, which is a different problem from stopping the data center next door.

One caution on ownership. Groundwater is not a mineral, and a deed that reserves or conveys the minerals does not by itself reserve or convey the water. If you are buying, selling, or have inherited land, confirm what the deed actually did with the water. We explain that trap in a mineral reservation does not reserve groundwater.

The Rule of Capture is the hard part

This is the doctrine that catches people, so it is worth stating plainly. Under the Rule of Capture, a Texas landowner has the right to pump an unlimited amount of groundwater from beneath his land, for any purpose, without liability to a neighbor whose well is lowered or drained as a result. The rule dates to Houston and Texas Central Railway Co. v. East, 81 S.W. 279 (Tex. 1904), and the Texas Supreme Court declined to abandon it as recently as Sipriano v. Great Spring Waters of America, Inc., 1 S.W.3d 75 (Tex. 1999), a case in which a bottled-water company pumped enough groundwater to deplete its neighbors’ wells and still won.

There are exceptions, but they are narrow. A pumper can be liable if he pumps maliciously to injure a neighbor, if he wastes the water willfully, or if his pumping negligently causes the land to subside. Draining your well by putting the water to ordinary use, which is what a data center’s cooling supply would be, does not fit any of those. So the instinct to sue the data center for drying up your well usually runs straight into the Rule of Capture and stops there.

Sipriano is also the case that points to the real answer. The Court left the Rule of Capture in place, but it did so precisely because the Legislature had made groundwater conservation districts the state’s preferred way to manage groundwater. In other words, the Court told landowners that the place to deal with excessive pumping is the regulatory system, not the common law. That is the door you want to walk through.

Where a data center gets its water changes everything

Before you can figure out your leverage, you have to figure out where the facility’s water is actually coming from, because the three common answers lead to very different analyses.

Buying treated water from a city or utility

If the data center buys treated water from a municipal system or a water utility, it is not pumping next to you at all. The strain on the aquifer runs indirectly, through that utility’s own permitted supplies and the rates and contracts it operates under. Your concerns there are the utility’s long-term supply and the pressure that a huge new industrial customer puts on it, which is a public and regulatory fight more than a private one.

Drilling its own wells on the site

If the facility drills its own production wells, that is a large new withdrawal in your area, and it is the scenario most likely to affect nearby wells. Those wells will generally need a permit if they sit inside a groundwater district and do not qualify for an exemption, and that permit is your opening to be heard.

Buying or leasing groundwater from a nearby landowner

The third pattern is the one landowners least expect. A developer or a water broker buys or leases the groundwater under a neighboring tract, drills there, and pipes the water to the data center. Because the seller owns his groundwater and the Rule of Capture lets him produce it, this can be entirely lawful, and it can put a very large straw into the same formation your well draws from. Districts can regulate that production, and there are limits on how far a district can go to restrict moving water out of the district, so the permit process is again where the action is.

Your real leverage is the district, not a lawsuit

Here is the part that actually helps you. Even though the Rule of Capture governs private disputes, a landowner’s groundwater can also be regulated by a groundwater conservation district, and most of South Central Texas is covered. Inside a district, the whole picture changes, because a new well generally cannot just start pumping. Chapter 36 of the Texas Water Code gives districts the police power to regulate groundwater production, and a well that is not exempt needs a permit before it can be drilled and produced. That permit requirement is the leverage the common law does not give you.

A district regulates through tools that directly affect whether and how hard a new well can pump: production permits with volume limits, well spacing rules that keep big wells a set distance from property lines and other wells, and, over the long run, the desired future conditions that a Groundwater Management Area adopts for the aquifer. Those desired future conditions, coordinated through the Texas Water Development Board, set how much drawdown the region is willing to accept decades out, and they drive how much water is available to permit in the first place. When a large new user applies to pump, you generally have the right to receive notice, to submit comments, to protest, and in a contested case to put on evidence about the effect on existing wells like yours.

These are not paper powers. The Water Code directs a district to regulate well spacing and production to minimize drawdown of the water table, to control subsidence, to prevent interference between wells, to protect water quality, and to prevent waste. Tex. Water Code 36.116(a). And the rules hold up. When large irrigators recently attacked a district’s production and spacing limits as an unconstitutional taking of their groundwater, a federal court upheld the district, finding a single-digit reduction in land value fell far short of a taking and that the rules did exactly the job Chapter 36 assigns them. BLF Land, LLC v. North Plains Groundwater Conservation District. A district that can lawfully cap and space an irrigator’s wells can do the same to a data center’s.

Be clear-eyed about what the district can and cannot do for you. Its job is to manage the aquifer for the whole area toward those desired future conditions, not to guarantee any single well. It will not promise that your well will never drop. But it can condition or limit a large new permit, require spacing, and in some districts require mitigation for wells that are harmed, and none of that happens unless someone shows up and makes the record. That someone should be you.

Move fast, because this leverage runs on a hard clock. A large water permit usually goes to a contested case hearing, and the deadlines to protest, to ask for rehearing, and to appeal a district’s decision are strict and jurisdictional. They are unforgiving even for sophisticated parties. In recent litigation a major river authority had its court challenge to a district’s permit decision dismissed for failing to meet the statutory deadlines to seek review. Lost Pines Groundwater Conservation District v. Lower Colorado River Authority; see Tex. Water Code 36.412. If a deadline like that can end a river authority’s case, it can end yours.

Edwards Aquifer Authority or a Chapter 36 district: know which governs your well

South Central Texas is unusual, and it is the single most important thing to sort out, because two different kinds of authority operate here under two different statutes, and the same tract can fall under both depending on which formation a well draws from. We covered this in our guide to living next to a data center, and it is worth repeating here.

The Edwards Aquifer Authority regulates the San Antonio segment of the Edwards Aquifer under its own enabling act, not Chapter 36. It runs on its own permitting regime, and the Edwards is essentially fully allocated, so new supply generally has to come from leasing or transferring existing permits rather than from a fresh grant, and pumping is subject to mandatory cutbacks during drought under critical period management. A data center that wants Edwards water usually has to acquire someone’s existing rights, which is a different fight from a brand-new permit.

Everywhere the Edwards Authority does not reach, and for wells drawing from other formations such as the Trinity, Chapter 36 groundwater conservation districts govern. In your five-county footprint that means, among others, the Guadalupe County Groundwater Conservation District, the Comal Trinity Groundwater Conservation District, the Trinity Glen Rose Groundwater Conservation District in north Bexar County, the Medina County Groundwater Conservation District, and the Evergreen Underground Water Conservation District in Atascosa County. To know your rights and your deadlines, you first have to know which of these governs the well you care about, and our guide to what groundwater aquifer is beneath your property is a good place to start.

Exempt wells and permitted wells are not treated the same

One more distinction shapes these disputes. Not every well needs a permit. Under Section 36.117 of the Water Code, districts exempt certain wells from permitting, most commonly wells used for domestic and livestock purposes and small-capacity wells, though districts can still require that they be registered. Many rural home and stock wells are exempt. A data center’s cooling supply well is not; a well that big is a permitted, regulated use.

That difference cuts both ways, and it is worth understanding. Your exempt domestic well is convenient because you do not need a permit to use it, but exempt status does not put a protective bubble around it, and it does not give you special priority over a nearby permitted well. Our discussion of exempt water wells in Texas walks through what exemption does and does not mean. The practical takeaway is that when a large permitted user moves in near your exempt well, your protection again comes from the permit process for that big well, not from the exempt status of your small one.

What this means for South Central Texas landowners

The data center build-out across Bexar, Medina, Comal, Guadalupe, and Atascosa Counties is arriving in a part of the state where water is already spoken for and already regulated, and these facilities are among the thirstiest neighbors a rural landowner will ever have. The law here is a split screen. You own the water under your land, which is a genuine and valuable right, but the Rule of Capture means you generally cannot stop a neighbor, or a data center, from pumping his own wells and lowering yours. What you can do is use the regulatory system that Texas built for exactly this problem.

That is why the landowners who protect their water are the ones who move early. They test and document their wells while the numbers are still normal, they learn whether the Edwards Aquifer Authority or a Chapter 36 district governs, and they show up when a large new permit is on the table instead of after the pumping has started. If a data center is coming to your area and you depend on a well, treat the permit calendar the way you would treat a lawsuit deadline, because in every way that matters to your water, that is what it is.

This guide is part of our data center landowner series. For the broader picture of living beside one of these projects, see our guide to living next to a data center. If your problem is water arriving rather than water leaving, see what happens when data center construction floods your land. And for more on Texas water rights generally, visit our water law practice.