San Marcos has become the first city in Texas to ban data centers outright, launching what could become one of the state's most significant legal and political battles over local control. The City Council's narrow 4-3 vote on June 16 not only blocks future data center development within city limits but also creates a test case that could determine how much authority Texas cities retain over land use as artificial intelligence and cloud computing drive an unprecedented demand for massive computing facilities.
The decision comes at a pivotal moment for Texas. The state has emerged as one of the country's fastest-growing data center markets, fueled by abundant land, competitive electricity prices, and business-friendly policies. Yet communities across Texas are increasingly questioning whether the economic benefits of these facilities outweigh concerns about water consumption, electricity demand, noise, and infrastructure strain.
Rather than waiting for developers to submit formal proposals, San Marcos acted preemptively. The city amended its zoning code to define data centers as a land use that is prohibited throughout the municipality, effectively preventing any future projects from being built inside city limits.
A Preventive Strategy
Unlike many Texas communities already grappling with active development proposals, San Marcos currently has no proposed data center projects within the city itself. However, the pressure is mounting along its borders.
At least two large data center developments have been proposed in unincorporated areas of Hays County surrounding the city, raising concerns among local officials that San Marcos could eventually face similar proposals. Residents have voiced fears that large-scale computing facilities could place significant demands on regional groundwater supplies and electric infrastructure during a period of rapid population growth.
Those concerns intensified earlier this year after a Fort Worth developer sought to annex approximately 200 acres into San Marcos for a project that residents feared could consume tens of millions of gallons of water annually from local aquifers. Following widespread public opposition, the City Council rejected the annexation request.
The debate over that proposal helped lay the groundwork for the city's broader decision to prohibit data centers altogether.
Council members supporting the ban argued that the projected economic benefits remained uncertain while community concerns over natural resources, infrastructure, and long-term planning remained unresolved.
Home Rule Becomes the Central Legal Question
San Marcos is relying on a legal authority that distinguishes it from many other Texas municipalities: home rule.
Texas home-rule cities possess broader authority to regulate land use through locally adopted zoning ordinances. Legal scholars say that gives cities like San Marcos a stronger legal foundation than counties, which possess only powers specifically granted by state law.
That distinction has become increasingly important as counties have struggled to slow data center development.
Hill County abandoned its own moratorium after facing a $100 million lawsuit from a developer. Hood County similarly withdrew a proposed moratorium after questions arose over whether counties possessed the legal authority to impose such restrictions.
San Marcos has chosen a different path.
Instead of issuing a temporary moratorium, the city permanently amended its zoning ordinance to make data centers an impermissible land use. Land use experts argue that distinction could prove critical because zoning authority has traditionally been one of the strongest powers granted to municipalities.
Some legal scholars believe courts could uphold the ordinance if judges conclude it aligns with the city's comprehensive plan and serves legitimate public health, safety, and welfare objectives.
State Leaders Signal an Immediate Challenge
The city's action is unlikely to go unchallenged.
State Sen. Paul Bettencourt has already indicated that he believes San Marcos exceeded its authority and plans to contest the ordinance. His argument centers on two relatively recent state laws that have expanded state authority over local governments.
One is House Bill 2559, enacted in 2025, which limits how long municipalities may impose certain development moratoriums. Bettencourt contends San Marcos has created what amounts to a permanent moratorium disguised as zoning.
Supporters of the city's ordinance disagree. They argue that San Marcos did not impose a moratorium at all but instead exercised its traditional zoning authority by determining where certain land uses may occur.
The dispute also raises questions under Texas' 2023 "Death Star" law, legislation intended to prevent cities from adopting regulations that conflict with state law. While the measure was designed to create greater statewide consistency, legal experts continue to debate exactly how far its restrictions extend, particularly regarding municipal zoning authority.
Because courts have not yet fully defined the law's limits, San Marcos could become the first major test of how it applies to local land-use decisions.
A Growing Divide Over Data Centers
The legal battle reflects a broader debate unfolding across Texas.
Demand for data centers has accelerated rapidly due to the explosive growth of artificial intelligence, cloud computing, and digital services. Texas has become one of the nation's most attractive destinations for these developments because of its business climate and expanding power infrastructure.
Yet many communities remain skeptical.
Residents frequently point to concerns over massive electricity consumption, water-intensive cooling systems, increased noise from industrial equipment, and pressure on local infrastructure. These issues have transformed data centers from relatively obscure industrial facilities into one of the state's most controversial forms of development.
The concerns have attracted bipartisan attention.
Even Gov. Greg Abbott has proposed changes to state policy, including reconsidering tax incentives that have historically encouraged data center investment while examining how the industry affects the state's electric grid.
The debate increasingly centers not on whether data centers should exist, but on where they should be located and who should decide.
Other Cities Pursue Less Confrontational Approaches
Most municipalities watching San Marcos have opted for strategies that stop short of an outright prohibition.
Cities such as Lockhart and Kerrville have revised their zoning codes to sharply limit where data centers may be built rather than banning them entirely.
Lockhart confined data centers to heavy industrial districts, dramatically reducing the number of eligible sites. City leaders are also considering stricter special-use permit requirements that would subject any proposal to additional scrutiny before approval.
Kerrville similarly restricted permissible locations while adding new requirements related to water capacity, cooling systems, and projected water usage.
These cities hope that stringent regulations will discourage unwanted projects without inviting the kind of immediate legal challenge San Marcos now faces.
Communities lacking zoning authority have even fewer options.
Cities such as Alvin have adopted nonbinding resolutions expressing opposition to data centers. While largely symbolic, these resolutions communicate community priorities and seek to influence future legislative discussions.
Counties have also turned to indirect methods.
Hays County recently approved a nonbinding resolution encouraging a pause in data center consideration because of regional water concerns. Although the measure carries no legal force, county leaders hope it highlights the need for additional state authority over this rapidly expanding industry.
Some legal experts also point to development incentive agreements as another available tool. Cities and counties can negotiate tax incentives in exchange for additional development standards, allowing local governments to influence projects even where direct regulatory authority is limited.
A Case Every Texas City Is Watching
San Marcos' decision has already drawn attention from municipalities across Texas seeking guidance on how much authority they retain over future development.
For many local officials, the issue extends beyond data centers themselves.
The case represents a broader struggle over whether communities can shape development based on local infrastructure limitations, environmental concerns, and long-term planning priorities, or whether state leaders will continue centralizing land-use authority in Austin.
If San Marcos prevails, other home-rule cities may feel more confident adopting similar zoning restrictions.
If the courts strike down the ordinance, cities could become far more cautious about attempting aggressive land-use regulations in areas where state lawmakers have signaled a preference for uniform statewide policies.
The next legislative session could also reshape the landscape. Lawmakers may decide to grant counties greater authority over data center development, further restrict municipal powers, or establish statewide standards governing where these facilities may be built.
Until then, San Marcos stands at the center of a debate that reaches well beyond one city's zoning code.
