Meta AI Data Center Linked to Rare Bacteria in Cheyenne, Wyoming's Water System

Meta AI Data Center Linked To Rare Bacteria In City's Water System

SOURCE: FORBES · BY VICTORIA FORSTER · PUBLISHED JULY 9, 2026

As the use of Artificial Intelligence expands worldwide, companies are scrambling to construct data centers to keep up with soaring demand. Much has been reported about how these data centers use significant quantities of water for cooling — but a recent incident in Wyoming has highlighted a new and alarming concern for local water supplies: microbial contamination.

In the City of Cheyenne, near the border with Colorado, a rare bacterium called Cupriavidus gilardii was detected in the City's reclaimed water system in February after wastewater from the construction and commissioning of a Meta AI data center entered the city's wastewater network. The finding resulted in a temporary shutdown of parts of the system while officials carried out remediation work.

What Is Cupriavidus gilardii?

Cupriavidus gilardii is an environmental bacterium found in soil and water, and reported infections are rare. When infections do occur, they have generally involved people with significant underlying health conditions or compromised immune systems. Like many environmental bacteria, some strains can be resistant to multiple antibiotics if people are infected, meaning finding effective treatments can be challenging.

"Fill-and-Flush" and Aerosolized Exposure

The incident occurred during "fill-and-flush" operations — a process used to clean and prepare large cooling systems before they become operational. Officials were keen to stress that the bacterium was never found in drinking water, only water used for irrigation and other non-potable purposes. But despite this, there was concern that residents could be exposed to the bacteria through inhaling aerosolized droplets where the water was used — for example, in parks and golf courses.

Quoted in Business Insider, a Meta spokesperson said the company was working with its contractor Fortis to rectify the issue:

"When the board shared that it found a substance in the city's wastewater — not public drinking water — Fortis immediately stopped discharging industrial wastewater and began hauling it offsite. Fortis also began its own water testing with an independent environmental specialist, which has found no trace of the substance."

The First of Its Kind — But a Familiar Pattern

The incident in Wyoming appears to be the first publicly reported case of an AI data center project being linked to a microbial contamination event. But large-scale cooling infrastructure has been linked to numerous outbreaks of Legionnaire's disease, transmitted by the bacteria Legionella. When water systems are poorly maintained, Legionella can grow and people can inhale tiny water droplets containing the bacteria. The New York City health department is currently investigating a new outbreak which has sickened 36 people and resulted in 22 hospitalizations so far on the Upper East Side.

A Warning, Not a Verdict

The Forbes piece is careful to note that this does not mean AI data centers are necessarily a new source of infectious disease — the Wyoming case was linked to wastewater generated during the commissioning of a facility, not normal AI operations. But it serves as a reminder that the rapid expansion of AI is reshaping communities in ways that extend beyond electricity consumption and carbon emissions.

Residents are increasingly complaining of impacts on their health and wellbeing — from noise generated by data centers, and now, potentially, from water contamination. The incident in Cheyenne may be a warning that public health should be taken into account when locating and running these centers — not as an afterthought, but as a core consideration.

Why This Matters Here

This is exactly the kind of story this site exists to document. We've reported extensively on data centers' water usage, energy consumption, noise pollution, and land displacement — but microbial contamination of a city's water system is a new frontier. It's a reminder that the true cost of AI is not measured only in megawatts and acre-feet, but in public health risks borne by communities that never asked to host these facilities.

Cheyenne, Wyoming is the same city where, as we reported earlier, a planned Meta data center will require more electricity than every household in the state, combined. Now it's also the site of the first documented case of an AI data center contaminating a municipal water system. The pattern is clear: the costs are always local, the benefits always distant.

If you're living near a data center — in Cheyenne, Wyoming, or anywhere else — and you've noticed changes in your water quality, air quality, or health, your story matters. Environmental advocate Erin Brockovich is tracking over 8,000 community reports of data center impacts nationwide at brockovichdatacenter.com. Submit your report there, and share your story on our community forum.

Because the next contamination event won't make headlines until someone gets sick. We need to document these incidents before they become outbreaks.

Sources & Citations

• • Forbes — "Meta AI Data Center Linked To Rare Bacteria In City's Water System" (Victoria Forster, July 9, 2026; primary source)
• • TechSpot — Cheyenne suspends data center wastewater after rare bacterium traced
• • Business Insider — Meta data center wastewater bacterium, Cheyenne, Wyoming
• • NIH/PMC — Cupriavidus gilardii infection reports
• • NYC Health Department — Legionnaires' disease outbreak investigation
• • The New York Times — Data center noise pollution
• • Forbes — AI data center build-out faces infrastructure and political headwinds
• • Forbes — World Water Day and the hidden water footprint of AI
• • Associated Press — Wyoming Meta data center electricity demand
• • Brockovich Data Center Registry — Erin Brockovich's nationwide impact map

Source: Forbes · By Victoria Forster · Published July 9, 2026