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A Data Center's Water Discharge Halted After Contamination

July 11, 2026 Hannah Osei

Cooling System Purge Causes Bacterial Spread

Cheyenne, Wyoming, has suspended water discharges from a Meta data center. This action follows the contamination of the city's reclaimed water supply. A rare, metal-resistant bacterium was found in the system. The data center's cooling system is now offline for months of cleaning.

The contamination occurred during a commissioning process called „fill-and-flush.”Crews fill cooling loop piping with water and then flush it out. This procedure inadvertently spread the bacteria into Cheyenne's water.

The issue arose from purging the data center's closed-loop cooling system. This process released the metal-resistant bacteria. The city's reclamation water system became compromised. This type of bacteria is not commonly found.

What Does This Mean for Cheyenne's Water Supply?

The city acted quickly to revoke Meta's discharge permit. This ensures no further contamination occurs. The data center must now undergo extensive cleaning. It will remain offline for several months.

The city's reclaimed water supply is directly affected. This water is typically used for non-potable purposes. Its contamination raises concerns about broader environmental impacts. The long-term effects on the water system are being assessed.

The incident highlights the importance of rigorous testing. Industrial water discharge protocols need strict oversight. This event serves as a warning for other municipalities. Data centers use significant amounts of water. Their operations must be carefully monitored.

The Meta data center faces a significant cleanup effort. This will delay its full operation. The city is working to restore the integrity of its reclaimed water. Officials are monitoring the situation closely.

Frequently Asked Questions

What caused the contamination in Cheyenne's water system? The contamination was caused by a rare, metal-resistant bacterium. It spread during a fill-and-flushcommissioning step at a Meta data center. This process purges the cooling system.

How long will the Meta data center be offline? The Meta data center will be offline for several months. This time is needed for extensive cleaning and remediation. The goal is to eliminate the bacterial contamination.

What is reclamation waterand how is it used? Reclamation water is treated wastewater. It is typically used for non-potable purposes. This includes irrigation, industrial processes, and groundwater replenishment.

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