L.A. County freezes new hyperscale data centers in unincorporated areas as Solis pushes for a permanent ban

L.A. County's Department of Regional Planning on Thursday froze new hyperscale data centers across the county's unincorporated areas, a temporary land-use moratorium signed by planning director Amy Bodek and aimed at the warehouse-scale facilities that power generative AI. The Sept. 17 freeze is procedural, not a ban: it buys the county time to draft a permanent ordinance, which Supervisor Hilda Solis wants the Board of Supervisors to vote on Oct. 6.

Hyperscale, in industry shorthand, means a single warehouse-scale facility built to house the dense computing, cooling, and electrical systems that generative AI training and inference require. Unincorporated L.A. County is the territory the county government runs but the city of Los Angeles does not: most of the San Gabriel Valley, the high desert, and the Santa Monica Mountains sit outside the city limits. The moratorium applies only in that territory; projects inside the city of Los Angeles are governed by a separate planning process. The county's long-range planning page on data centers describes the framework as a temporary hold until a permanent ordinance is prepared and adopted.

Solis, who chairs the board and represents the First District, will introduce her motion at the Community Services Cluster Agenda Review virtual meeting on Sept. 23. If the cluster signs off, the motion goes to the full board on Oct. 6 for a public hearing and a final vote. Her office says the motion advances a countywide data-center impact report for unincorporated communities.

The action is the second step in a chain that started April 14, when the board directed county staff to study the strain large data centers place on public utilities and on residents' health. That motion asked the Department of Public Health to weigh in on noise, and director Barbara Ferrer told the board that the constant low-frequency hum from a hyperscale facility can create sensitivity and health impacts in some people who live near one.

San Gabriel Valley pushback is what drove the board from study to freeze. The flashpoint built over months of organized opposition to water use for cooling, electricity demand and expected utility-rate increases, and 24/7 noise. That same pressure had already moved the private market: an El Segundo developer recently withdrew a proposal for a massive data center after significant resident opposition, a pullout that came before any city or county action. Pasadena Now's coverage places the same pullout in the broader pattern of LA-area resident revolt.

County land-use authority is the chokepoint every project that needs new water hookups, new substation capacity, or a new conditional-use permit has to clear, and a planning director's temporary freeze resets that clock while the ordinance is being written. If the board approves a permanent ordinance on Oct. 6, the freeze becomes the legal floor; if the board waters the ordinance down, the freeze expires when the planning director's signature lapses.

The moratorium takes effect immediately and runs until the board acts, amends, or lets it lapse. The next procedural date is Sept. 23, when Solis's motion goes to the Community Services Cluster Agenda Review.