California data center boom raises water questions for Valley districts

Key Takeaways

1. InsideClimate News reports a surge of California data center proposals that would rely on water for cooling.
2. Facilities often use evaporative systems that can draw heavily during heat waves when power demand is highest.
3. Dry or hybrid cooling can cut water use, but it increases electricity load and costs.
4. For the Valley, any new sites would likely seek municipal supplies or groundwater in basins managed under SGMA.

Irrigation season is here. The canals shine, the crews are walking lines, and forecasts keep creeping into the 90s by lunch. The same heat that pushes growers to open the drip line also pushes data centers to drink more water to stay within temperature, which is why a statewide building wave for artificial intelligence has City Halls and water boards reading the fine print.

The InsideClimate News story lays it out plainly, a lot of the new computing boxes want water for evaporative cooling, and they want it most on the hottest days. That timing matters in the Valley, where surface deliveries shift with the water year and groundwater pumping is under court-approved plans.

What the report says

Reporters found California is fielding clusters of data center plans tied to AI demand. Many operators prefer evaporative systems because they cut power bills, but they use significant volumes and spike in summer heat. Others pitch dry or hybrid cooling to lower water draw, and that means higher electricity use that lands on the same grid our pumps and packhouses use. Heat pushes cooling costs up.

Jobs are the sales pitch. Water, power and siting are the questions. The story points to a scramble between agencies and companies over who supplies what, whether recycled water can cover the load, and how those choices play when reservoirs run tight.

Why this lands in the Valley

The Valley has space, cheaper land and major transmission lines along 99 and I‑5. If data center proposals slide inland, they’ll land in cities like Fresno, Bakersfield or Modesto where supplies are a mix of surface water and wells, and where SGMA plans are already ratcheting down overdraft. Municipal users sit inside those same basins as growers and ranchers. On the hottest afternoons, everyone pulls.

Fresno has invested in treatment and distribution to cut groundwater reliance. Modesto and Turlock send treated wastewater to other uses through a regional program. Bakersfield blends sources year to year. None of those set‑ups were designed with a half dozen 24‑7 server halls in mind, and that’s the rub for boards that have spent the last decade writing groundwater allocations and explaining them to people who irrigate for a living.

What local boards will ask first

Where will the cooling water come from, city taps, reclaimed lines or a private well. How will discharge be handled and at what temperature. Can a dry or hybrid system make the numbers pencil without shifting too much load onto peak hours when districts are already warning about outages. What does backup power look like and who pays for line upgrades. How many permanent jobs are on the table, not construction, and how does that weigh against a long water commitment in a dry September.

Those are the Bakersfield and Fresno questions, and they’ll sound familiar to anyone who sat through a groundwater plan meeting. A tight budget year, too.

One small thing I noticed last week walking past a city yard in south Fresno: a stack of purple‑cap PVC, dusty as chalk.

Central Valley AI is produced by the CVAI Newsdesk team and developed by Kaweah Tech, a regional firm that builds, deploys, and integrates AI solutions for businesses across California's Central Valley.

Source

https://insideclimatenews.org/news/29042026/california-data-center-boom-water-issues/