Cheyenne Suspends Data Center Wastewater Discharges After Bacterial Contamination
Cheyenne, Sunday, 5 July 2026.
Cheyenne indefinitely suspended data center wastewater discharges after a Meta contractor contaminated the city’s system with a rare, metal-resistant bacterium, prompting months of municipal cleanup.
Discovery of the Contaminant at Project Cosmo
On February 25, 2026, the Cheyenne Board of Public Utilities (BOPU) discovered Cupriavidus gilardii bacteria within the municipal reuse water system [2]. This contamination was traced directly to “Project Cosmo,” an $800 million, 74,322-square-meter (800,000-square-foot) Meta Platforms Inc. (META) data center campus currently under construction in the High Plains Business Park [2]. This massive infrastructure facility represents a capital intensity of approximately 10763.973 USD per square meter [2][GPT]. The source of the bacterial introduction was identified as “fill-and-flush” discharges from Goat Systems LLC, a contractor working on the Meta data center project [3].
Municipal Impact and Public Safety Concerns
The BOPU lab staff initially detected the non-regulated, metal-resistant bacterium during routine fecal-bacteria sampling in February 2026 [1]. Frank Strong, the BOPU’s engineering and water resource division manager, noted that testing for this specific organism is not a standard municipal procedure, requiring specialized detection once anomalies were observed [1]. Because Cupriavidus gilardii poses potential aerosol hazards if present in reclaimed water used for irrigating local parks and golf courses, the city temporarily suspended its reclaimed water irrigation program to protect public health [1][3]. While municipal drinking water remained unaffected throughout the incident, some bacteria bypassed treatment processes and entered Crow Creek, though subsequent testing at both city wastewater treatment plants has since returned negative results [3].
Regulatory Escalation and Permanent Discharge Bans
On March 24, 2026, the BOPU officially revoked the industrial discharge privileges of Goat Systems LLC, finding the contractor in “significant noncompliance” with industrial pretreatment regulations [2]. The bacterial discharge violated both the Cheyenne City Code and federal pretreatment regulations regarding pass-through and interference [1]. To prevent future contamination, the BOPU enacted a permanent ban on industrial wastewater discharges from data centers utilizing closed-loop cooling and fill-and-flush systems [3]. The utility now requires industrial companies using closed-loop systems to construct separate collection systems to store water in tanks instead of discharging it into the sanitary sewer [3].
Indefinite Suspensions and Plant Remediation
On July 2, 2026, the BOPU escalated its response by announcing an immediate, indefinite suspension of all industrial wastewater acceptance from data center fill-and-flush and closed-loop systems [2]. This suspension expanded the discharge ban to all data centers connected to city services, though the BOPU has not yet clarified the impact on other facilities currently under construction [1]. The contamination had previously forced the Dry Creek and Crow Creek water reclamation plants offline for months of cleanup [1]. Testing at these affected facilities finally cleared in late June 2026, allowing the water reuse system to return to full operation on July 1, 2026 [1][3].
Corporate Mitigation and Ongoing Water Hauling
In response to the revocation, Meta’s general contractor, Fortis, immediately ceased discharging industrial wastewater and transitioned to hauling it offsite [2][3]. A spokesperson for Meta stated that the company is supporting Fortis’s efforts to resolve the issue with the BOPU and remains committed to protecting local water resources [2][3]. Meta also asserted that independent environmental testing identified no traces of the bacteria [1][2]. As of July 3, 2026, the status of these independent testing results remains pending as the contractor coordinates with the utility board [1].
Local Governance and Future Policy Implications
The incident has drawn sharp criticism from local officials, with Cheyenne City Councilman Pete Laybourn describing it as “a very, very unpleasant surprise” that complicates municipal planning [2]. Cheyenne Mayor Patrick Collins expressed disappointment, while Betsey Hale, CEO of Cheyenne LEADS, clarified that the bacterium was not created by the construction process itself but was already present in the environment before entering the system [2][3]. As the BOPU continues to evaluate future regulatory frameworks and long-term environmental impacts, a public records request submitted by the Wyoming Tribune Eagle remains under legal review [2][3].