San Francisco's Board of Supervisors has unanimously approved a 45-day moratorium on city approvals for new data centers, opening a temporary window for officials to study the facilities' effects and develop longer-term rules. The measure had not taken effect at the time of the vote because it still required action by Mayor Daniel Lurie.
Supervisor Shamann Walton introduced the pause as concern grows over the infrastructure needed to support artificial-intelligence services and other computing workloads. Under the proposal, the Planning Department would examine energy and water demands, air quality, land use and community impacts. Officials also want a clearer definition of what qualifies as a data center under city rules.
The immediate pause is short, but supervisors could extend it for as long as 22 months. City leaders are expected to hold a progress hearing in November to review the department's findings. Whether the board would ultimately support the full extension remains uncertain.
The debate is particularly significant in Walton's District 10, which includes Bayview-Hunters Point, Visitacion Valley, Potrero Hill and Dogpatch. Two of San Francisco's six identified data-center sites are located in the district, according to market data cited by the San Francisco Standard. A private-equity representative also met mayoral policy staff in August about permits for a proposed 1.6-acre waterfront facility in Dogpatch.
Residents and community advocates backed the moratorium at a committee hearing. Their testimony connected new industrial development with longstanding concerns about pollution and unequal health outcomes in southeastern neighborhoods. Walton said the review should produce enforceable protections and provide residents a meaningful chance to comment before projects receive approval.
San Francisco is not acting in isolation. Oakley, Richmond and Gilroy have already adopted data-center moratoriums, while Oakland and Hayward are considering similar measures. The local actions reflect wider scrutiny of facilities that can create substantial electricity demand and may require significant water or cooling infrastructure.
The vote does not permanently prohibit data centers, nor does it cancel existing facilities. Its practical effect, if approved by the mayor, would be to halt new city approvals while planners build a policy framework. That distinction matters because the final rules could range from additional disclosure and siting requirements to tighter limits in communities already carrying a large share of industrial land uses.
For San Francisco, home to many companies driving demand for AI computing, the moratorium places the physical footprint of digital services squarely in the city's land-use debate.
Any extension would require further political action after the initial review. The planning study is likely to shape both the factual basis and eventual scope of regulation, including whether rules distinguish large commercial campuses from smaller technical facilities. The current measure sets no final operating standard.
