Sierra Club Urges Rejection of Meta’s Attempt to Use Minor Source Loophole

The Sierra Club is pushing back on an air pollution permit for Meta's massive data center project in Louisiana, called Hyperion, which is set to be the largest data center in the world. Meta got approval last year for a "minor source" air permit, a category with looser pollution limits, to run 31 diesel emergency generators, a diesel fire pump, and diesel storage tanks. Now Meta wants to add 44 fossil-fuel water boilers that would run around the clock. That addition would push total pollution past what a minor-source permit allows, so Meta is proposing to simply not count emissions from the 31 diesel generators when they run during emergencies. State regulators have signaled they're fine with that approach.

The Sierra Club argues this doesn't add up: emergency generators exist specifically to run during emergencies, so their emissions during those hours should count. The group wants Louisiana's environmental agency to require the stricter "major source" permit instead, which comes with tighter pollution limits, and to hold a public hearing so nearby residents can weigh in before anything is finalized. It's also asking regulators to consider battery storage as a cleaner alternative to some of this equipment.

This isn't a program homeowners can apply to or a rebate you'd use, but it points to a broader trend: as data centers expand nationally, many are seeking multiple "minor source" permits that carry lighter pollution rules and make it harder to see the full, cumulative impact on air quality in surrounding communities. The EPA has also proposed changes that would reduce public input in this permitting process generally.