California Just Stopped Ratepayers From Subsidizing AI. The Real Story Is What the Other 49 States Do Next.

Last October, Gavin Newsom vetoed AB 93, a bill that would have required data centers in California to disclose and certify their water consumption. His veto message was almost apologetic: "I am reluctant to impose rigid reporting requirements about operational details on this sector without understanding the full impact on businesses and the consumers of their technology."

On Monday he signed a water-disclosure bill that does nearly the same thing, plus six others. The Governor's office called the package the most comprehensive set of data-center laws in the nation, and that is roughly accurate. The more interesting question is why the veto stopped working.

Since last October, opposition to data centers hardened into something politicians can no longer wave away. A July survey from the Public Policy Institute of California found 73% of Californians oppose a data center being built in their community, and 63% worry about the environmental impact of building more of them. Monterey Park became the first city in the country to ban data centers by popular vote in June. Coachella banned them outright. Richmond, San Francisco, Hayward, Palm Springs, Indio, Desert Hot Springs and Tulare County have all moved toward moratoriums or bans of their own. By the time the seven bills reached Newsom's desk, signing them was the cheaper political option.

The governor did not pretend otherwise. "While the Trump administration moves toward deregulation, communities are left to deal with the consequences — higher electricity demand, grid constraints, water use, and pollution," he said in a statement. He added that the laws ensure "Californians remain in the driver's seat — and that those profiting from data centers aren't doing so at our expense."

What the seven laws actually require

Three bills handle electricity. SB 886 (Sen. Steve Padilla) and AB 2383 (Assemblymember Rick Chavez Zbur) direct the California Public Utilities Commission to build tariffs that make data centers pay for the transmission upgrades needed to connect them, cover the generation costs of serving them, and carry a larger share of wildfire mitigation and liability costs than they do today. SB 1168 (Sen. Jerry McNerney) adds rate-structure requirements on top. Bloomberg Government reports the new rates are due by the start of 2028. Both Padilla bills passed with real margins rather than a party-line squeaker: SB 886 cleared the Senate 28 to 10 and the Assembly 62 to 7, and SB 887 passed 30 to 8 and 59 to 11.

Padilla is blunt about the intent. "Big Tech keeps promising to be good neighbors and these laws now make those promises legally enforceable," he said. "No more saying one thing in the White House and doing the opposite in our local communities."

Two bills handle water. AB 2469 (Assemblymember Diane Papan) blocks a city or county from approving a data center until the developer discloses projected water use, and makes the developer responsible for the cost of the water conveyance, treatment, storage and distribution upgrades the water supplier says are needed. AB 2619, also Papan's, requires operators to report water sources and consumption, with actual annual usage and cooling-system type reported at license renewal. That last detail is the one to watch. Cooling architecture showing up in a public filing is a new kind of exposure for operators who have treated it as an engineering secret.

The remaining bills change process rather than cost. SB 887 removes data centers from blanket exemptions under the California Environmental Quality Act, so a project can no longer be waved through as a category presumed to have no significant environmental effect. SB 887 also sets the conditions for the narrow fast lane that remains, and they read like a spec sheet: interconnection costs paid in advance, grid investments and new generating capacity covered, no increase in in-state fossil fuel consumption, four hours of zero-carbon storage sized to at least half of forecast peak demand, recycled water and efficient or waterless cooling, hourly zero-carbon electricity within five years with 75% of it from newly developed resources, and a binding community-benefits agreement. AB 1577 adds operating-data reporting to the California Energy Commission covering load, total consumption, onsite generation, fuel use, storage, cooling refrigerants, demand-response participation and power usage effectiveness, published in anonymized aggregate form.

The numbers behind the urgency

California is not Texas or Virginia on this front. Data centers account for roughly 2% of the state's electricity demand, according to a 2024 California Energy Commission estimate, and the commission expects that share to double within ten years. The state has nearly 300 data centers with 54 more in the pipeline, per a Pew Research Center analysis from February.

The cost question is where it turns sharp. TURN, the ratepayer advocacy group that co-sponsored SB 886, points to a transmission plan from California's grid operator projecting up to $1.8 billion in upgrade costs in PG&E territory alone to serve data-center demand. Reported pipeline figures for PG&E have ranged widely depending on when they were given: roughly 10 gigawatts over the next decade, on the order of what 7.5 million homes would draw, with a June report quoting utility spokesman Fred Han at 5.3 gigawatts, of which 4.6 gigawatts sat in final design. Either number is large enough that the allocation formula matters more than the headline figure.

For scale, consumers in four states served by PJM, the country's largest grid operator, paid more than $4 billion in 2024 for transmission projects serving data centers, per a California Senate committee analysis of SB 886. Nationally, the watchdog Data Center Watch estimates at least 45 projects worth roughly $68 billion were blocked or delayed in the second quarter of 2026, and says thirty statehouses introduced or adopted legislation on siting, water, power and cost-sharing. The National Conference of State Legislatures counts 16 states weighing outright construction bans.

The industry says the bar is unattainable

The Data Center Coalition, whose members include Google and Microsoft, opposed the package. "We don't see it as a streamlining mechanism, because those standards are not attainable," said Khara Boender, the group's Western government affairs director, referring to SB 887's conditions. She has also argued that more regulation "would be another signal that the state is a more challenging place for data center development."

PG&E opposed SB 886 directly. Spokesperson Paul Moreno told Canary Media the bill would "introduce rigid, duplicative requirements that conflict with existing regulatory processes, risk higher costs for customers, and delay critical infrastructure needed to serve the state's growing energy demand." The California Chamber of Commerce, filing against the bill, argued that unusually burdensome infrastructure requirements attached to privately financed energy assets "risk discouraging the development of these facilities in California."

Support was not unanimous on the other side either. Monica Embrey of the Affordable Energy Campaign called last-minute amendments "concerning," flagging that data centers generating their own power escape the clean-energy requirements and that a utility can strike its own agreement with a data center during the interim before state regulations are finished. That interim gap is where the next round of arguments will happen.

A floor, not a green light

Be precise about what the laws do not do. They override no local zoning and overturn no ban. AB 2469 explicitly states that a city or county need not approve a project just because the applicant completed the required disclosures and agreed to pay for water-system improvements. The package sets a statewide floor on disclosure and cost allocation for jurisdictions willing to consider a project, and in parts of California that is a shrinking set.

Two tariff regimes now sit side by side. Investor-owned utility territory falls under the new CPUC structure once it is written. The Imperial Irrigation District went its own way six days before the signing, adopting Schedule LL, which applies to new or expanded customers seeking at least 20 megawatts with an 80% minimum load factor. It requires a 15-year commitment, project-funded studies and infrastructure, minimum payment obligations, exit charges, and financial security sized to cover as much as 60 months of the district's estimated exposure, with service interruptible at the district's discretion.

What it means if you build hardware

The practical effect is that resource disclosure stops being a sustainability footnote and becomes a design constraint with a filing deadline attached. If water source, cooling type, peak load profile, onsite storage and property-line noise estimates all land in a permit file, those numbers get specified, measured and defended. The 2028 tariff window is less a reprieve than the runway you have to model the cost of a site before committing to the land.

The precedent travels, too. This is a state framework built while federal policy runs the other way: the White House has pushed to accelerate data center permitting, President Trump has said regulation is not necessary, and the administration has floated removing public input requirements for new data centers and the power plants behind them. Thirty statehouses drafting from a similar playbook is what happens when the federal lane stays open and the local lane closes.

Jensen Huang, whose chips sit in most of these facilities, put the underlying lesson more plainly than any legislator did. Asked about the backlash on CBS over the weekend, he said tech leaders should have engaged communities long before setting up data centers. "All of this happened so quickly, and it happened all over America so quickly," he said. "We didn't realize and we didn't get a chance to be polite, to be a visitor in some new town." The bills California just signed are what that missed conversation looks like once it is written into statute, with named costs and specific dates attached.

For teams building or sourcing infrastructure into California, the new floor changes the brief. Power and water availability are now diligence items with public documentation attached, the tariff math has to be modeled before the site is chosen rather than after, and cooling architecture is suddenly part of the compliance story. At DMC we work with hardware companies navigating exactly these constraints, from sourcing strategy and cost modeling to production ramp planning when the regulatory environment moves faster than the roadmap. If your next deployment touches California and you want the numbers stress-tested before you commit, let's talk.