California data centers will have to report their power draw to the state, pay in advance for the grid upgrades they trigger, and go through full environmental review rather than claiming a categorical exemption, under seven bills Gov. Gavin Newsom signed on Sept. 21.
The package lands in the middle of a construction wave that has run into local resistance across the country, and the governor’s office called it the most comprehensive set of data center laws in the nation. For developers, the practical effect is a longer, more documented path to a site in the country’s largest state economy β and a bill for infrastructure that in other markets has been spread across utility customers.
“With these laws, we are ensuring that Californians remain in the driver’s seat β and that those profiting from data centers aren’t doing so at our expense,” Newsom said in the announcement, which framed the signings as a contrast with federal deregulation.
What the seven bills do
The bills are AB 1577 by Assemblymember Rebecca Bauer-Kahan; AB 2383 by Assemblymember Rick Chavez Zbur; AB 2469 and AB 2619, both by Assemblymember Diane Papan; SB 886 by Sens. Steve Padilla and Jerry McNerney; SB 887 by Padilla; and SB 1168 by McNerney.
AB 1577 is the disclosure measure. According to the Legislative Counsel’s Digest, it requires data centers with electrical capacity of 10 megawatts or more to file operating data with the California Energy Commission when they energize and annually thereafter, broken out by month. The reportable items include floor area and IT equipment space, peak electrical capacity, maximum load, power usage effectiveness, total annual kilowatt-hour consumption, onsite generation and fuel use by type, energy storage, demand-flexibility program participation, refrigerant types and cooling degree days. The commission is to publish the information annually in anonymized, aggregated form. Publicly funded research, safety and national security facilities and utility facilities are exempt, and the assessment obligations begin with the 2029 integrated energy policy report.
SB 886, the California Technology Innovation and Ratepayer Protection Act, directs the California Public Utilities Commission to create or revise tariffs governing how large “participating customer facilities” connect to the grid and buy power, with the work due by Jan. 1, 2028 and the provisions aimed at data centers seeking transmission-level retail service after Jan. 1, 2027. The digest describes cost assignment tied to the transmission upgrades a given facility requires, refunds capped at 75% of annual transmission revenue, early-termination fees if a facility leaves within 10 years or fails to reach projected consumption, and a requirement that utilities publish maps showing where interconnection would avoid costly upgrades. Applicants must disclose interconnection applications they have filed in other utility territories On our reading, that provision is aimed at projects that file for capacity in several grids at once.
The land-use change matters most to developers
SB 887 is the bill that reaches zoning and entitlement. It makes data centers ineligible for categorical exemptions under the California Environmental Quality Act, so projects face review rather than a shortcut. In exchange, it lets the governor certify a data center as an “environmental leadership development project,” which carries expedited judicial review of CEQA challenges β but only if the project clears a demanding list.
Per the digest, a qualifying project must serve its hourly energy needs with 100% zero-carbon electricity within five years, with 75% of that from newly developed resources; install zero-carbon storage equal to at least four hours at 100% of forecast peak demand and use it for demand response; pay the full interconnection cost in advance and commit to the grid investments needed to serve it; use recycled water and water-efficient or waterless cooling; avoid any increase in fossil fuel consumption in California; and enter a binding community benefits agreement covering workforce development and environmental mitigation. The Office of Land Use and Climate Innovation is to write uniform statewide standards in consultation with the energy agencies.
The water bills work on the front end of siting. The governor’s office said proposed projects must give local governments and water suppliers information on water use, supply, efficiency and drought planning, and that any upgrades needed to deliver that water are paid for by the data center.
A pattern across statehouses
California joins a run of states rewriting the terms of data center development. Virginia regulators ordered data centers to pay for dedicated transmission infrastructure, and Texas told its environmental agency to stop issuing data center permits pending an audit. Polling this year put local opposition to nearby projects at 69%.
What is new in the California package is the combination: mandatory operating disclosure, a ratemaking process with a deadline, and the removal of an environmental shortcut paired with a narrow, conditional fast lane. Read together, the laws move the cost of serving a data center onto the project and the schedule risk onto the developer β while leaving a certified path for operators willing to build clean supply and sign a community agreement. Whether that path is used is the thing to watch; the CPUC tariff work does not have to be finished until 2028. Further coverage is in RealtyWire’s Technology & AI section.
