What is Air Permit (PSD / Title V)?
An air permit is the Clean Air Act authorization a facility needs before constructing or operating significant emission sources such as generators, turbines, or process equipment. Major sources require PSD (Prevention of Significant Deterioration) construction permits and Title V operating permits, both public records with comment periods. Data centers with large generator fleets often trigger air permitting, the application discloses generator counts and site plans months before groundbreaking.
On the Gulf Coast, the air permit is often the first public record of a new plant. In Texas, TCEQ New Source Review (NSR) applications cover new and modified emission sources; in Louisiana, LDEQ air permits and Part 70 (Title V) operating permits go through public notice. The application names the applicant, the site and the equipment, such as turbines, heaters, flares and emergency generators.
For BD teams, the equipment list is the useful part. It tells you what kind of plant is coming and roughly what will be bought, long before a contractor is named. A Title V renewal on an existing site is routine paperwork; a new NSR application or a major modification usually means construction.
Public notice and comment dates are set in the notice itself, so they are a reliable calendar for when the agency can act and when the owner can start.