Law scales back data center rules, orders state study by 2027

A bill intended to tighten regulation of data centers' impacts on California's power grid was substantially weakened during the 2025 legislative process and took effect January 1, 2026 as a law that requires state regulators to study the issue and deliver a report by 2027 rather than immediately impose new rate or technology mandates.

The original proposal sought clearer limits on how data centers access utility capacity and would have allowed regulators to change rate structures or require technology standards to limit peak demand. Those measures were removed as the bill progressed, reflecting a political compromise shaped by industry lobbying and lawmaker concerns that aggressive mandates could drive projects and jobs out of state.

The dispute centers on the scale of data-center energy demand. Operators have requested large blocks of additional capacity in California, prompting utility forecasts for new investments in transmission and distribution infrastructure. Policymakers who pushed for stricter rules argued those investments, and associated costs, could be shifted onto residential and small-business customers unless larger commercial users pay for more of the grid upgrades they require. Opponents cautioned that sudden rate changes or technology requirements could halt projects, weaken local employment prospects, and push data-center development to other states with more permissive rules.

San Francisco County and neighboring jurisdictions are already host to major facilities that exemplify the issue, including large campus-style projects such as Digital Realty’s SFO12. Local governments face decisions on permitting, land use, and whether to require additional mitigation as part of approvals. Utilities and regulators also must reconcile supply planning, reliability, and California’s decarbonization goals as demand patterns shift with increased computing loads.

The new law steers the debate into a regulatory study phase. That study will be critical for residents and local officials because its findings can shape future rulemaking on rate design, interconnection practices, cost allocation, and possible technology mandates such as demand response, on-site storage, or efficiency standards. The study period also gives industry and labor advocates time to press for protections or incentives tied to local jobs and investment.

For San Francisco residents, the immediate effects are indirect: no immediate new charges or mandates, but continued uncertainty about whether growing data-center demand will lead to higher utility bills or new construction impacts in their neighborhoods. The law creates a public process in which residents, local governments, utilities, and industry will be able to weigh evidence before regulators consider any binding reforms. Attend upcoming public hearings and monitor the regulator’s docket to ensure community concerns about rates, reliability, and local impacts are part of the record that shapes the 2027 report.