Texas AI Data Center Permits May Miss On-Site Power

Texas’s data-center crackdown focuses on projects seeking grid connections, while many facilities also bring power generation on-site. That distinction matters: an investigation by Floodlight and The Texas Tribune found that at least 38 Texas data centers obtained minor-source permits for on-site power since 2024, covering more than 2,100 diesel generators. The permits are associated with smaller pollution sources such as dry cleaners, but they can also apply to infrastructure built alongside data centers.

A permit category under strain

Minor-source permits offer a streamlined route intended for smaller sources of pollution. According to the reporting, they do not require the environmental studies, public notice and public comment associated with major permits. The concern is not simply that a data center uses this category; it is that a permit pathway designed for smaller sources can cover power equipment at a very different scale.

OpenAI’s Stargate campus in Abilene shows the contrast. The investigation found that it had built 10 gas-powered turbines and 62 backup diesel generators, and was seeking approval for another 41 turbines and 18 generators. The existing equipment was initially authorized through minor permits.

Thresholds can shape what gets reviewed

The investigation also reported facilities with estimated nitrogen oxide emissions close to thresholds for more stringent review. A CyrusOne data center in Whitney estimated 249.1 tons annually, just below a 250-ton threshold; a Vantage facility outside San Antonio received permission for 99.8 tons annually in an area with a 100-ton threshold. These are estimates and permit figures, not measurements of actual emissions. More than half of the data centers identified in the investigation submitted annual nitrogen oxide estimates just below thresholds for public input and more detailed review, according to the report. The reported figures and thresholds make clear why the lines regulators draw can matter as much as the permit label.

Grid oversight is not the whole picture

Governor Greg Abbott ordered an audit of data-center projects seeking connections to the Texas grid and directed the state environmental agency to pause issuing permits sought for them until the audit is complete. The NAACP Texas State Conference and the NAACP Center for Environmental and Climate Justice argued in an open letter that measures focused on grid connections may leave facilities that generate or source their own electricity insufficiently addressed. The groups also raised concerns about cumulative pollution, water use and noise; those are their concerns, not established findings. The audit and the NAACP’s objections point to a regulatory question: whether review tracks a project’s full power infrastructure, not only its connection to the grid.

The distinction has practical consequences. A facility can draw less from the grid while still operating substantial on-site generation, so a grid-focused review alone may not capture the whole infrastructure footprint. Texas’s response also includes broader permitting directives, so the reporting does not establish that on-site projects escape oversight. The sharper test is whether permits assess the facility and its power supply together, rather than letting their separate approvals obscure their combined scale.