California moves to force data centers to reveal power and water use

California data center power and water disclosure laws

California Governor Gavin Newsom signed a package of seven bills on Monday, September 21 2026, that aims to lift the veil on how data centers affect local electricity and water resources. The legislation comes as the rapid expansion of facilities that support artificial intelligence draws increasing scrutiny from residents who worry about rising utility bills and strained water supplies. Lawmakers hope the new rules will give communities and researchers the information they need to assess whether these hubs are driving up costs or straining the environment.

New power rates for data centers set by California Public Utilities Commission

The measures direct the California Public Utilities Commission to establish distinct power rates for data centers. This is intended to ensure that the expense of building new transmission links to serve these high-demand facilities is not shifted onto ordinary electricity customers. One of the bills also encourages operators to draw a larger share of their power from renewable sources. Another requires monthly reporting of energy consumption, beginning in 2027, so that regulators and the public can track trends in electricity use over time.

Water usage transparency statutes for data centers

Water transparency is addressed through two separate statutes. They compel data center operators to disclose water usage when they apply for permits or obtain a business license. The same legislation makes the operators responsible for funding any upgrades to local water infrastructure that are needed to accommodate their operations. A final bill removes a previous categorical exemption that had allowed data centers to bypass review under the California Environmental Quality Act, meaning each new project will now undergo a standard environmental assessment.

Mark Specht, who leads the climate and energy program at the Union of Concerned Scientists, said the lack of basic data has made it difficult to gauge the true impact of these facilities. He noted that earlier research co-authored by his team outlined two possible outcomes for electricity rates. In one scenario, the surge in demand from data centers forces utilities to invest in costly new grid connections, and if the AI boom falters, the excess capacity could leave other ratepayers covering the bill. In an alternative view, the fixed costs of maintaining the grid could be spread over a larger customer base, potentially lowering bills for everyone, provided that data centers connect to the distribution network that serves homes and businesses rather than tapping straight into the high-voltage transmission system. Specht stressed that without concrete numbers, it is impossible to say which pattern is emerging in California, but he warned that the situation is likely to evolve as data center power needs continue to grow.

On the water front, researchers from Santa Clara University attempted to collect usage figures from every water provider serving districts that host data centers. The providers declined to share the information, citing privacy rules, and the team found that very few data centers in the state have made environmental impact reports publicly available. The new disclosure rules will begin to close that gap, although they only apply at the permitting stage, leaving a lack of ongoing, real-time water use data.

Impact of AI-driven data centers on rural water and low-income communities

Experts point out that the latest wave of hyperscale data centers, driven by AI development, is increasingly locating in rural areas where water systems are smaller and communities often have lower incomes. Those localities may be less able to absorb additional demand, making timely and accurate information even more critical for planning and equity considerations.

For people who build with or rely on AI, the California legislation signals a shift toward greater accountability. Developers will need to factor in potential reporting requirements and possible costs for infrastructure upgrades when siting new facilities. Users of AI services may see indirect effects if the new rules lead to changes in electricity pricing or water availability in regions where data centers concentrate. Staying informed about how these rules unfold, especially the monthly energy reports set to start in 2027, will help stakeholders anticipate operational impacts and engage constructively with local officials and utility providers. The move also highlights a broader trend: as AI infrastructure expands, states are likely to adopt similar transparency measures to balance innovation with community welfare.

Frequently asked questions

What legislation did California Governor Gavin Newsom sign on September 21 2026 to increase transparency about data centers?

Governor Gavin Newsom signed a package of seven bills on September 21 2026 that aims to lift the veil on how data centers affect local electricity and water resources, including distinct power rates, renewable energy incentives, monthly energy reporting starting in 2027, water use disclosure at permitting, funding for water infrastructure upgrades, and removal of a CEQA exemption so each new project gets a standard environmental assessment.

What new energy reporting requirement will data centers in California face starting in 2027?

Beginning in 2027, California law will require data center operators to submit monthly reports of their energy consumption, allowing regulators and the public to track electricity use trends over time.

How does the legislation address water usage transparency for data centers?

The statutes compel data center operators to disclose water usage when they apply for permits or obtain a business license, and they make the operators responsible for

Source: The Verge