Air quality monitoring and permits near data centers

At a glance

Based on auto-generated captions; names and details may be misheard.

What: how Shelby County measures air quality and regulates emitters, and whether it can show effects of data centers and their gas turbines, especially the xAI site in southwest Memphis.
Where it stands: at the 10/19/2026 hearing health department staff said the county has six air monitoring stations. The one nearest the xAI site (called Riverview) went online in June 2026 and lost power for a couple of weeks after a storm, so there is no fair comparison until next year. xAI has not violated its air permit since being permitted, they said.
Next: the department will have a year of comparison data next summer and will share data on request.

Stations are sited by EPA criteria, not next to individual facilities. Walker and White pressed on how close monitoring is to the gas turbines and whether it can answer residents' complaints; staff said about 26 major sources are in the surrounding radius, so no one facility can be singled out, and there is no baseline from before xAI arrived.
Some high ozone days showed up at that station, but also at Shelby Farms and Hernando during the hot summer. Staff said alerts go out when a station exceeds limits.
xAI was described as a synthetic minor source: its controls keep it under the 100 tons per year major-source line. Violations can lead to a notice of violation hearing and fines.
The department has two staff meteorologists and inspects permitted facilities at least yearly.
White noted that facility-specific claims would need a different kind of testing than the countywide network.

About 19 minutes across 1 meeting (from transcript timestamps; approximate).

Meeting	Minutes
2026-10-19 - Planning & Zoning	19

2026-10-19 - Planning & Zoning — Health department staff answered questions on monitoring stations, permits and what the data can and cannot show.
2026-09-15 - City Council Committees - Health Department written answers summarized (13 high-ozone days in 2026); council formally requested a presentation; university satellite study of the xAI site found no significant worsening nearby.