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California Lawmakers Seek More Transparency on Data Center Water Use

As artificial intelligence fuels a new wave of data center development across California, lawmakers are grappling with how to support the growing industry while protecting the state’s limited water supplies.

Two bills moving through the Legislature would give state and local officials a more complete picture of data centers’ water demands. AB 2469 would require developers to disclose projected water use before local governments approve new facilities, while AB 2619 would require operators to report actual water use annually once the facilities open.

 

California’s Water Wars Get a New Invader

Golden mussels do not vote, hire lobbyists or contribute to campaigns. But the invasive species taking over California’s system of canals and pumps holds a lot of power in Sacramento these days. It’s bringing some of the state’s warring water factions together, while giving others a new reason to fight.

The thumbnail-size mollusks, native to Southeast Asia and first discovered in North America near the Port of Stockton in 2024, reproduce rapidly, cling by the thousands to hard surfaces and clog the pipes, pumps and screens that keep water moving.

Federal Government Helping Add Water to Lake Mead, SoCal Water Agency Says

In an effort to address the historic-low water level at Lake Mead, the Metropolitan Water District of Southern California Tuesday approved an agreement with the federal government to help add water to the reservoir.

On Tuesday, Metropolitan’s Board of Directors approved an agreement with the U.S. Bureau of Reclamation, which will provide the agency up to $65 million to keep up to 200,000 acre-feet of its Colorado River supplies in the lake this year.

Water-Saving San Diegans’ Bills Won’t Go Up As Steeply as Feared. Here’s Why.

A court ruling is prompting San Diego to propose new water rates that eliminate discounts for conservation — requiring rate hikes for low-volume users and cheaper water for high-volume users.

But the rate hikes for low-volume users are smaller than previously estimated, because plaintiffs in the court case agreed to a $40 million settlement — despite the courts awarding them $118 million.

OPINION: Trump Greenlights California’s Dumbest Water Project

On July 9, the Trump administration delivered a gift to Cadiz Inc., a politically well-connected firm that has been trying for decades to win approval for a scheme to pump water out of the Mojave Desert and market it to water agencies across the Southland.

The administration approved the company’s application to convert an abandoned 220-mile oil and gas pipeline crossing the desert to carry water instead. Susan Kennedy, the chief executive of Cadiz, called the approval “a pivotal milestone” that would enable the project to move into its construction stage.

OPINION: At Sweetwater Authority, Water Affordability Isn’t an Accident

At a time when families are grappling with rising costs for housing, groceries and other essentials, keeping basic services affordable has never been more important. For public water agencies, that responsibility extends beyond delivering safe drinking water. It means balancing today’s needs with tomorrow’s challenges through thoughtful planning and sound financial stewardship.

That is why the Sweetwater Authority governing board’s recent approval of a $65.6 million budget for fiscal year 2026-27 with no increase in water rates deserves attention.

Regional Watershed Blueprint Aims To Help California Prepare for a Changing Water Future

A new watershed resilience plan released by the Regional Water Authority and regional partners examines how climate change could affect water supplies

Arizona’s San Pedro River Runs Dry for the Second Time in 122 Years

For the second time in 122 years, a sensitive gauge measuring the San Pedro River’s streamflow near Sierra Vista went dry, a reading conservationists say is bad news for one of the Southwest’s last free-flowing rivers.

On June 22, the river stopped flowing at a U.S. Geological Survey stream gauge east of the city. That site, known as the Charleston gauge, monitors the river’s water level at the surface and remained at zero for over two weeks.

OPINION: Conservation Isn’t Enough for California’s Weather Whiplash, We Need Reliable Water

It wasn’t that long ago that drought dominated the West.

From 2014 to 2017 and again from 2021 to 2023, record after record was broken as clear skies and relentless sunshine became the norm. The governor’s office initiated statewide prohibitions on “wasteful water use,” mandating that cities, towns, and urban water suppliers reduce their potable water consumption by 25 percent. Central Valley farms received 8.7 million acre-feet less surface water than in a normal year, forcing growers to pump groundwater to keep permanent crops alive.

CWA Approves Updated Urban Water Management Plan

The San Diego County Water Authority approved an updated Urban Water Management Plan.

The unanimous SDCWA board vote June 25 approves a plan which predicts 561,564 acre-feet of total annual supply by 2050. The update, which will be submitted to the state’s Department of Water Resources and will also be used to assess adequate supply for potential new development, also includes a water shortage contingency plan.