California's seven new data center laws shift costs to operators
Seven bills signed in September 2026 require data center operators to cover infrastructure costs and disclose water and energy use.
California signed seven sweeping data center regulations on September 21, 2026, fundamentally reshaping how the state governs the industry's electricity use, water consumption, and environmental impact. The laws transfer infrastructure costs from residential ratepayers to data center operators, impose new disclosure requirements, tighten environmental review, and establish a system of financial penalties for early exits or unmet load projections. Governor Newsom framed the regulations as ensuring "that those profiting from data centers aren't doing so at our expense."
The regulatory package marks a dramatic reversal from 2025, when Newsom vetoed similar measures. The intervening year brought mounting political pressure and industry growth that proved impossible to ignore. California's Independent System Operator projects a 2.3-gigawatt increase in data center energy consumption by 2030. Pacific Gas and Electric alone received approximately 2,300 megawatts of capacity applications in 2024. Current data centers demand roughly 1,000 megawatts of electricity statewide; that figure is projected to climb to 4,500 megawatts by 2040, potentially accounting for 9 percent of the state's peak electricity demand. A Gallup poll in May 2026 found that seven in ten Americans oppose data center construction in their communities, part of a public backlash that lawmakers said helped drive this year's legislation.
How transmission costs now get assigned to data centers
SB 886, the California Technology Innovation and Ratepayer Protection Act, establishes the framework for transmission-level tariffs that shift infrastructure costs away from general ratepayers. The law requires the California Public Utilities Commission to adopt these new tariffs by January 1, 2028, creating a methodology for assigning transmission facility upgrade costs and usage charges directly to data center operators.
Under the previous system, data centers could draw electricity from the grid and the costs of necessary transmission upgrades would be spread across all ratepayers, including households and small businesses. SB 886 changes this by mandating that data centers receive an accounting of the transmission upgrades their load requires, then pay for those upgrades themselves. The law caps refunds for initial contributions at 75 percent of the utility's annual net transmission revenue, preventing operators from recovering all upfront costs if annual revenues are lower than expected.
The law imposes a 10-year early termination fee for facilities that exit the system within a decade or fail to consume the electricity they committed to purchasing. This fee must be at least the revenue gap over the minimum 10-year commitment period—in other words, no less than the difference between the revenue the utility expected to receive and what it actually collected. The mechanism is designed to discourage operators from abandoning projects once infrastructure investments have been made.
SB 1168 directs the Public Utilities Commission to assess rate structures that ensure data centers pay a reasonable share of transmission and distribution costs, effective January 1, 2027. Implementation will also need to reconcile two overlapping proceedings already underway at the Commission: PG&E's proposed Electric Rule 30 application and the California Advanced Electric Rate Design rulemaking.
Generation costs and the 10-year purchase commitment
AB 2383 layers a second tariff structure on top of transmission costs, requiring data centers to commit to purchasing electricity—and paying for generation costs—over a minimum 10-year period. Unlike transmission, which focuses on grid infrastructure, the generation tariff addresses the actual power plants and renewable energy facilities needed to serve the load.
The law requires providers to establish mechanisms ensuring data centers pay for "incremental generation cost increases resulting from the data center's load." This means if a data center's arrival increases demand by 50 megawatts, the operator pays for the generation costs associated with meeting that 50-megawatt increase for at least ten years. The tariff typically requires upfront collateral or prepayment to secure these obligations.
AB 2383 caps the generation tariff's peak demand threshold at 25 megawatts, with the Public Utilities Commission setting the exact figure; facilities at or above that threshold must comply. However, operators can reduce their obligations by installing behind-the-meter zero-emission resources—solar panels, batteries, or other on-site generation. If a data center installs 10 megawatts of rooftop solar, it can reduce its tariff obligations by the equivalent amount.
The law includes exemptions for publicly funded research facilities and utility-owned data centers, recognizing that some operations serve public purposes. All tariffs require approval from the CPUC and parallel tariffs from community choice aggregators and energy service providers by January 1, 2028. Community choice aggregators must adopt their own versions of these tariffs to apply the same cost allocation to their customers.
Mandatory water and energy reporting by facility size
Three bills—AB 1577, AB 2469, and AB 2619—create a tiered disclosure system based on facility size. AB 2619 establishes three categories of data centers: Type I facilities consume more than 25 megawatts or operate more than 10,000 servers; Type II facilities consume 2 to 25 megawatts; Type III facilities consume less than 2 megawatts.
AB 1577 applies the strictest reporting requirements to the largest facilities. Data centers with 10 megawatts of capacity or greater must file annual reports to California's Energy Commission detailing peak load, total kilowatt-hours consumed, power usage effectiveness (a measure comparing energy consumed by data center equipment to total energy consumed, including cooling and power conversion), on-site generation capacity by type, fuel type, energy storage capacity, and refrigerant types. At the time a facility begins operations, operators must disclose their peak capacity and total floor area to the Energy Commission. Separately, when applying for local permits, operators must disclose expected average and maximum sound levels at the property line.
These reports feed into state-level planning. Beginning with the 2029 integrated energy policy report, the Energy Commission must assess data center electrical load trends, project future demands, identify potential peak load challenges, and recommend ways to mitigate grid impacts and greenhouse gas emissions.
AB 2469 focuses on water. Data center applicants seeking local land use approval must provide water supply assessments, project their annual water use, describe efficiency measures, and disclose the composition and wage ranges of their anticipated workforce. Starting January 1, 2028, operators must also submit a water scarcity plan with staged drought measures—contingency protocols that kick in at different drought severity levels. Data center operators bear the full cost of any upgrades needed to provide water conveyance, treatment, storage, or distribution.
AB 2619 requires facilities to estimate their annual water use before receiving a business license, providing a sworn statement of expected consumption. Upon renewal, they report actual usage by source (potable, nonpotable, recycled water) and cooling system type. This tiered reporting system means larger operators face more extensive obligations than smaller ones, though all data centers must now disclose their environmental footprint to regulators and local governments.
“Data center operators must achieve 100 percent zero-carbon electricity within five years of operation, with at least 75 percent from newly built renewable energy projects.”
Environmental review: no exemptions, but expedited approval for zero-carbon facilities
SB 887 eliminates data centers' eligibility for categorical exemptions from the California Environmental Quality Act (CEQA), the law requiring environmental review before major projects receive approval. Previously, some data center projects could bypass detailed environmental analysis. That exemption no longer exists.
However, the law creates an alternative pathway: facilities that meet stringent environmental leadership standards can qualify for CEQA streamlining—faster, less burdensome review.
Operators must prepay transmission interconnection costs upfront, rather than spreading payments over time. They must install and maintain on-site zero-carbon energy storage equivalent to at least 4 hours of forecasted peak load—so a 100-megawatt facility would need 400 megawatt-hours of battery storage. On-site electricity consumption must rely on behind-the-meter zero-carbon generation, such as rooftop solar or wind turbines, to the maximum extent feasible.
Cooling systems must use recycled water, water-efficient methods, or operate waterless. Most significantly, within five years of beginning operations, facilities must achieve 100 percent zero-carbon electricity, with at least 75 percent from newly built renewable energy projects. This means operators cannot simply purchase renewable credits or use existing solar farms; they must finance new renewable energy capacity.
These environmental leadership requirements apply effective January 1, 2027. They create a two-tier system: most data center projects will face mandatory CEQA review and may take longer to approve; projects willing to invest in battery storage, on-site solar, and new renewable energy contracts can move through the system faster.
Why the veto reversal and what the industry says
In 2025, Governor Newsom vetoed similar data center regulation measures, signaling skepticism about restricting the industry. By 2026, circumstances shifted. Rising electricity costs affecting households, highly publicized water consumption concerns, growing capacity application volumes, and consistent public opposition to new data center construction created political pressure the Governor could not ignore.
PG&E's roughly 2,300 megawatts of data center capacity applications in 2024 alone illustrated the scale of projected growth. Absent action, the cost of the grid upgrades needed to accommodate this load would have continued to flow through to residential and small business ratepayers rather than the operators driving the demand.
The Data Center Coalition, the industry's membership association, warned that the legislation "create[s] significant uncertainty" and could push projects to other states, suggesting California's expanded requirements may disadvantage the state in competing for new development. However, Governor Newsom's office characterized the laws as "the most comprehensive data center laws in the nation," framing them as protecting consumers and communities while preserving California's role as a technology hub.
The legislation reflects a policy choice: operators choosing to build in California must absorb infrastructure costs, disclose resource consumption, and meet environmental standards in exchange for access to the grid and local communities.
