Little Hoover Commission hearing spotlights data-center strain on California grid, ratepayer and water risks

Elise Torres, assistant managing attorney of the energy team at the Utility Reform Network (TURN), warned the Little Hoover Commission that the scale of proposed data-center load could drive significant electricity rate increases for California households.

"PG&E is forecasting data center demand of over 10 gigawatts," Torres said, adding that TURN's review of utility filings shows that such new load would be financed through capital investments added to the utility rate base and recovered from all customers over decades. In Torres's testimony TURN estimated PG&E's grid and generation capital investment to support each gigawatt of data-center load at "between half a billion and $1.6 billion," and cited interconnection cost figures in the tens of millions per site.

Why it matters: Utilities recover infrastructure spending through rates and, as Torres and public commenters emphasized, many residential and small-business customers have limited ability to absorb further price increases. Torres told commissioners that data centers frequently connect at the transmission level and pay transmission-only rates, bypassing distribution charges that now fund wildfire hardening and other public-purpose costs; she urged a new data-center customer class and rate design to ensure large loads pay an equitable share.

Stanford researcher Leong Min, managing director of the Bits & Watts Initiative, told commissioners that some parts of the Western transmission system are used well below capacity even under stressed summer conditions and that targeted fixes to constrained "hotspots" could unlock capacity more quickly than building long-lead new transmission. "There's more room on the grid than people think," Min said, describing preliminary research with average loading numbers for particular voltage classes well below capacity.

Min and other witnesses also pushed permitting and interconnection reforms to shorten the "speed-to-power" timeline that data-center developers say they need to site and energize facilities. Min and Berkeley Lab witnesses said that if California can provide quicker, reliable access to power—whether by better use of existing transmission capacity, targeted upgrades, or paired local resources—policymakers may be able to require stronger consumer protections (for example, credit, exit fees or minimum contract terms) in exchange for faster access.

Environmental and community advocates pressed another strain from the buildout: water and air. Linda Taub Gordon of the Berkeley Human Rights Center and Meshika Allgood of All AI Consulting urged stronger disclosure and oversight of data-center water use and on-site backup-generation (diesel) emissions. Gordon said allowing hyperscale facilities to operate without standardized reporting "makes mitigation harder to plan and makes government oversight and public access to information less effective or even possible." Allgood and others noted that some large operators do publish facility-level water and energy data, arguing that disclosure can be done without revealing trade secrets.

Public commenters from agriculture and local communities echoed those concerns. Michael Bocadoro of the Agricultural Energy Consumers Association said high utility rates and prioritization of grid investment for large loads could delay electrification projects needed by farms and food processors. A San Jose resident, Alina Yen, told commissioners she felt local approvals and implementation agreements had not made the expected cost and water impacts transparent to residents.

What commissioners asked for: Questions from commissioners focused on allocation of costs between transmission and distribution, whether rate design or legislation should respond, and how to craft safeguards against stranded assets—measures discussed included upfront contributions, contract terms that limit refunds, exit fees and minimum contract durations. Witnesses pointed to pending CPUC activity (PG&E's Rule 30 interconnection tariff) and to recent but altered or vetoed state bills as possible venues for those changes.

Next steps: The commission said it will hold a follow-up hearing (scheduled for Dec. 11) with utilities, regulators and industry to examine interconnection and permitting, and staffers and witnesses urged improved public reporting and coordinated state-level approaches that pair speed-to-power with protections for ratepayers and local communities.