Texas Data Center Boom Could Reverse Air Quality Gains, New Analysis Warns

Texas could see a sharp rebound in power-plant pollution over the next five years as a surge of data center construction drives unprecedented electricity demand, according to new research from the Houston Advanced Research Center. The report warns that if planned facilities are built and supplied by the state’s expected grid mix, pollution from soot, smog-forming emissions and carbon dioxide could rise enough to undo decades of cleaner-air progress.

The finding matters well beyond Texas. The state has become one of the main battlegrounds for the physical infrastructure behind generative AI, and the choices developers make there — from grid hookups to onsite gas generation to renewable power — may shape how quickly the AI boom expands and how costly it becomes for public health and the climate.

Texas is already the nation’s largest data center market by power capacity, with existing and under-construction projects totaling about 26 gigawatts. But the latest analysis suggests the next wave of buildout could come with a substantial pollution bill if operators rely on fossil fuels to meet demand quickly.

Why Texas is at the center of the data center pollution debate

Texas has become the most important proving ground for the electricity demands of AI because it combines cheap land, an enormous power system, fast permitting in some areas and a business-friendly environment for large industrial projects. That mix has drawn hyperscale developers and utility planners into a state already strained by rising demand from homes, factories, crypto mining and electrification.

The new report from HARC focuses on what happens if the wave of proposed data centers materializes and is supplied largely through the power grid as currently forecast. In that scenario, the state’s power-sector emissions would climb so steeply that pollution levels could return to ranges last seen in the mid-2000s.

That is especially significant because Texas has spent years reducing emissions from electricity generation and transportation through cleaner fuels, tighter controls and changes in the generation mix. The report argues that those gains are now at risk if the AI infrastructure boom proceeds without cleaner power planning.

“There is a good chance that our children and grandchildren will breathe dirtier air than we did,” HARC chief executive John Hall said, warning that decades of progress could be erased if the current buildout continues on a fossil-heavy path.

What the new report found

The Houston Advanced Research Center modeled several possible futures for data center electricity use in Texas. Its headline finding is stark: under one scenario, the electricity sector could see major increases in pollution within just five years, with soot and smog-forming emissions rising sharply and carbon dioxide climbing substantially above 2025 levels.

The report says the exact outcome depends on how much of the proposed data center pipeline is actually built and what kind of power sources the facilities use. Some projects will never break ground, and some operators may choose renewable energy or direct onsite generation to reduce their dependence on the grid. But if the buildout proceeds at scale and is powered by the anticipated grid mix, the environmental consequences could be dramatic.

The analysis is especially focused on three pollutants that have major health and climate consequences:

• Fine particulate pollution, often called soot, which can aggravate asthma and heart and lung disease.
• Nitrogen oxides, or NOx, which contribute to smog and respiratory illness.
• Carbon dioxide, the main heat-trapping gas driving climate change.

How bad could the pollution get?

According to the report’s modeled scenario, soot pollution from the power sector could more than triple and reach its highest level since 2006. NOx emissions could rise by 136 percent, nearing 2004 levels. Carbon dioxide emissions could increase by 90 percent compared with 2025.

Those figures do not represent a guaranteed outcome. They show what could happen if Texas adds large amounts of data center load without changing the underlying energy system fast enough to keep up. In other words, the state’s air quality future is highly dependent on what kind of power gets built, where it gets built and how quickly the grid expands.

How could data centers make pollution worse?

Data centers are extremely electricity-intensive facilities, and AI workloads have accelerated the push to build more of them faster. The pollution risk rises when operators need power quickly and turn to less efficient or dirtier solutions to avoid long delays in connecting to the grid.

One path involves building onsite gas engines or turbines so a facility can start operating before utility infrastructure catches up. That can reduce delays, but it can also lead to higher emissions than a grid connection paired with cleaner generation. The report suggests that in Texas, this shortcut could push the state toward the dirtiest possible outcome.

Another path is to pair grid electricity with new renewable power built onsite, such as solar and wind. That approach can lower emissions substantially, but it requires land, capital, storage solutions and planning that not every developer is willing or able to provide at scale.

Why onsite generation matters

Onsite generation is central to the report because it can cut both ways. If developers install clean energy alongside data centers, NOx emissions could be as much as 10 times lower than in a fossil-heavy scenario. If they instead choose gas engines to bypass grid delays, pollution could be significantly worse than the grid-only alternative.

This means the same boom that is fueling demand for new electricity can either accelerate the transition to cleaner infrastructure or lock in a new generation of emissions. The policy and business decisions made in the next few years are likely to determine which outcome prevails.

Why is the AI boom changing energy planning so quickly?

The AI industry has turned data center electricity consumption into a strategic issue for utilities, regulators and state governments. Training and running large models requires large clusters of chips, cooling systems and around-the-clock power, and that demand is prompting companies to secure energy supplies years in advance.

Texas has become especially attractive because its large power market can absorb huge projects, but that same scale makes the environmental stakes enormous. When one state hosts a massive share of proposed capacity, even modest design choices can add up to major changes in emissions.

Industry groups and developers have responded by exploring self-supplied power, behind-the-meter generation and renewable procurements. Yet the report argues that many of the most aggressive buildouts still risk relying on fuel sources that produce more pollution than policymakers or communities expected when the projects were announced.

What does the broader market look like?

Texas is already the leading U.S. market for data center capacity, measured by electricity demand. HARC cites about 26 gigawatts of existing and under-construction capacity in the state. Separately, a Wood Mackenzie report published in March said Texas is also preparing for four times more proposed onsite-powered data center capacity than any other state.

That distinction matters because onsite power can be cleaner or dirtier depending on the technology selected. While some developers are planning renewable installations, others are reportedly leaning toward gas turbine systems to get facilities online faster. The result is a race between cleaner long-term infrastructure and quicker, more emissions-heavy stopgaps.

For local communities, the issue is not abstract. More power plants, more combustion and more traffic from industrial-scale development can mean worse air quality in already vulnerable regions. For utilities, the challenge is meeting demand without destabilizing the grid or forcing ratepayers to shoulder the cost of rapid expansion.

What could limit the damage?

The report makes clear that the pollution trajectory is not fixed. There are several ways Texas and data center developers could blunt the emissions surge:

1. Build more renewables onsite. Solar and wind can offset grid demand and reduce dependence on fossil generation.
2. Improve grid planning. Faster transmission upgrades and better interconnection processes could reduce the need for dirtier temporary power sources.
3. Choose cleaner backup systems. Developers can avoid the most polluting gas-based onsite options.
4. Scrutinize speculative projects. Not every announced data center will be built, so realistic forecasting matters.
5. Match load growth with emissions goals. Policymakers can require cleaner energy procurement for new industrial demand.

Still, the report’s warning is that the window for action is narrow. If the state waits until the projects are already operating, it may be too late to avoid a steep emissions spike.

How do the projections compare with Texas’s air-quality progress?

The projections are troubling because they point in the wrong direction for a state that has spent years improving air quality. Texas has made gains through a mix of transportation improvements, industrial controls and changes in power generation, even as population and economic activity have increased.

Those gains, however, are fragile. A sudden wave of electricity demand from the data center sector could overwhelm incremental pollution reductions elsewhere. HARC’s analysis suggests that the scale of the AI infrastructure buildout is large enough to reverse some of the progress that took decades to achieve.

That is why the report framed the issue not just as an energy question but as a public-health one. Soot and smog do not stay confined to fence lines around data centers; they affect people across metropolitan regions, especially children, older adults and residents with respiratory conditions.

What happens next?

The next phase will likely be decided by a mix of utility planning, corporate procurement and state-level energy policy. Developers need power fast, utilities need certainty about future load, and regulators need to ensure that growth does not come at the expense of public health.

If Texas can steer the boom toward cleaner electricity and better grid coordination, it may be able to keep the economic upside of data center expansion without the worst pollution outcomes. If it cannot, the state could become a cautionary tale for the rest of the country as AI infrastructure spreads nationwide.

For now, the message from the new analysis is straightforward: the AI data center boom is not only a technology story. It is also a smoke-stack story, a power-grid story and, increasingly, an air-quality story that could affect millions of people.

And the stakes, according to the report, may be as simple as this: either Texas finds a cleaner way to power the AI age, or it risks breathing life back into pollution levels many believed the state had already left behind.