McGregor is staring down a sudden water crunch as years of heavy groundwater pumping collide with a surge in nearby rocket engine testing. District regulators say the town's municipal utility has blown past its permitted withdrawals for three straight years, and residents are increasingly nervous about what that means for the already stressed Trinity Aquifer. How local leaders handle the next round of enforcement and permit talks will decide whether McGregor can keep its industrial engine humming without draining its water future.
Overpumping and the violations
The city’s municipal system produced nearly 258 million gallons last year, roughly 103 million gallons more than its 155 million-gallon permit allows, and the Southern Trinity Groundwater Conservation District has issued overpumping violations to the city, according to the San Antonio Express-News. District notices say the overdrawn volumes climbed from about 6.7 million gallons in 2023 to nearly 102.5 million gallons in the most recent year, and warn that McGregor must either secure rights for that extra water or face potential penalties. The same reporting notes that the city also has multiple open actions with the Texas Commission on Environmental Quality related to its utility operations.
Why the Trinity matters
The Trinity Aquifer beneath McLennan County supplies tens of thousands of residents and has been flagged by state and local agencies as vulnerable to long-term decline when pumping outpaces natural recharge. Regional modeling by the Texas Water Development Board shows that parts of the Trinity are already tightly managed because historic withdrawals have produced measurable drops in water levels. The Southern Trinity district's management plan lays out the permitting, monitoring, and enforcement system that governs local pumping, and gives the district authority to require mitigation, cap or cut production, and pursue enforcement actions to protect other water users if necessary.
SpaceX's role
SpaceX has expanded its McGregor test operations on land it leases from the city, adding new stands and stepping up the pace of engine firings, changes the company has acknowledged in letters to local officials. In a March 2025 letter posted on the city’s website, SpaceX said it is investing in vertical test stands with underground flame diverters and expects to shift away from noisier horizontal stands as that work moves ahead. Those engine tests rely on large volumes of water for fire suppression and cooling during each burn, a demand the municipal system has to meet when firings become more frequent.
City reaction and community pressure
City officials say they are working to bring pumping back into compliance while weighing ways to keep industry supplied without putting the aquifer at risk. The San Antonio Express-News reports that McGregor’s pending permit requests are on hold until the violations are resolved, even as local activists ramp up pressure for tougher oversight and higher fees on major industrial users. A 1,700-member Facebook group and longtime resident Dennis Fehler, who tracks the issue on his site, have pushed for clearer accounting of who is using how much water and who is footing the bill (dennisfehler.com).
Legal implications
The Southern Trinity district can require McGregor to lock down rights for any excess withdrawals, levy fines, or seek injunctions if the city does not adjust its pumping. Other Texas groundwater districts have already shown they are willing to play hardball. In Hays County, for example, regulators proposed roughly $448,000 in penalties against a utility accused of dramatically overshooting its allotment, a high-profile case cited by Texas Public Radio. That kind of precedent raises the stakes for McGregor’s negotiations over permits, offsets, and potential buybacks of water rights.
For McGregor, the practical choices are straightforward but politically loaded: trim industrial water use, pay for replacement supplies, or accept strict mitigation measures that could reshape the local economy. The next few weeks of district hearings and city filings will reveal whether the town can balance its industrial ambitions with the hard limits of its aquifer.
