TL;DR · 30-second read

The Short Version

County leaders in Palm Beach County, Florida, voted 5 to 1 to turn down Project Tango. It was a giant complex of computers for artificial intelligence, planned near about 2,400 homes and an elementary school.

A big worry was a constant low hum, day and night. The builders said cooling would need a one-time fill of about 650,000 gallons of water, roughly one Olympic swimming pool.

The bigger lesson is that local building rules are struggling to decide what these new facilities even are. The developer can try again.

Palm Beach County commissioners on Wednesday, July 15, 2026, voted 5-1 to deny without prejudice Project Tango, a proposed AI data center campus in Loxahatchee, WPEC (CBS12) reported. The vote followed hours of debate over low-frequency noise, water use, traffic and compatibility with a rural area that opponents said now includes about 2,400 homes and Saddle View Elementary School. Commissioner Maria G. Marino cast the lone vote in favor. Mayor Sara Baxter recused herself on the County Attorney’s advice because of her prior public statements opposing the project.

The request before the board covered Phase 2 of the site: 280,000 square feet of data and information processing, 148,000 square feet of cooling-related utility space and about 1.15 million square feet of warehouse. The applicant projected a $34.5 billion asset at build-out over six to seven years and about $561 million in tax revenue at build-out.

Executive Summary

Project Tango did not fail on a single number. It failed because commissioners could not agree with the applicant on what the project was. The developer’s attorney argued that data processing was already a permitted use on a site approved years ago for economic development. County staff answered that the application would add roughly 1.5 million square feet to that approval. One commissioner called the proposal “an AI hyperscale whatever” and questioned whether the county’s definitions had kept pace.

That dispute is the part that matters beyond Palm Beach County. Many AI data center plans rely on land entitlements granted for warehouses, light industry or generic economic development. Project Tango shows a local board declining to treat those older approvals as covering a 24-hour computing campus. The questions it pressed hardest, on low-frequency noise and on water, are ones existing codes were not written to answer.

Because the denial was without prejudice, the applicant can return with a revised plan. The hearing showed fairly clearly what the next attempt would need to bring: independent expert evidence, a named end user, and firmer answers on noise and water.

An AI Campus the Zoning Code Wasn’t Written For

The sharpest exchange of the hearing was about categories rather than engineering. Applicant attorney Brian Seymour described the request as an “allocation of permitted uses, not a new use,” noting that data and information processing is already allowed under the county’s code for the site. County staff rejected that framing directly: “That is incorrect. That is why we are here today. This application is to add square footage.” Staff said the site is approved for 2,020,000 square feet of Economic Development Center uses and that the request would add about 1.5 million square feet to the master plan. Opponents described the result as a 3.6-million-square-foot campus.

Commissioner Joel Flores put the underlying problem plainly: “This is not exactly a data center. This is something new.” He said he was struggling with whether the county was relying on older definitions “just because they haven’t been updated.” The applicant argued the campus should be treated as light industrial and noted it would replace existing heavy industrial operations, including asphalt and concrete plants. By conventional land-use logic, that is a reasonable argument, since a data hall generates little truck traffic or dust. But a hyperscale AI campus (a very large facility built to run AI workloads at scale) runs around the clock, needs substantial cooling equipment and draws significant electricity. Those traits do not map neatly onto a code category written for offices, warehouses or light manufacturing.

This matters for developers and investors who treat an existing entitlement as a de-risked asset. Project Tango is a single case and should not be read as a statewide trend. It does show that a board can decline to extend a years-old approval to cover an AI campus, even when the use is technically listed, if it concludes the scale and operating profile are materially different from what was approved. Sites whose value depends on legacy economic-development or industrial zoning carry that risk until local codes define AI facilities explicitly.

Closed-Loop Cooling Shifted the Water Question Instead of Settling It

The applicant’s water figures for the computing itself were modest. Its engineer said the campus would use a closed-loop cooling system, which circulates the same water rather than evaporating it daily. The data processing portion would use about 1,696 gallons per day, mostly for restrooms, sinks and kitchens. For comparison, county Water Utilities Director Ali Bayat said the neighboring Arden community uses about 400,000 to 500,000 gallons of drinking water a day. On that basis, daily data center use would be well under 1% of the neighborhood’s use.

Scrutiny moved to other parts of the plan. The system would need a one-time fill of about 650,000 gallons, roughly a day and a half of Arden’s consumption. The warehouse portion was projected at about 50,000 gallons a day, around a tenth of Arden’s daily use. When Commissioner Maria Sachs asked who would be using it, Seymour said he did not know the headcount because that information came from the contract purchaser. Flores also asked what happens if the loop water must be drained or becomes contaminated. The applicant’s environmental health expert said it would be collected and disposed of off-site under Florida rules.

The lesson for operators is that closed-loop designs can defuse the familiar evaporative-cooling objection, but that alone does not end the conversation. Boards will ask about every gallon on the site plan. A number without a named user or an explanation reads as a gap, whatever the cooling design.

Why Meeting the Noise Standard Didn’t End the Noise Debate

Low-frequency noise drew one of the longest lines of questioning. The applicant’s experts said the project would meet county noise standards and keep levels near Arden and the school within existing ambient levels. Acoustics expert Dr. Norm Bronner acknowledged that low-frequency noise “will exist,” but said it likely would not be particularly noticeable at the predicted levels. Commissioners focused on whether a constant hum would be audible to residents and students. “We’re not talking about music,” Sachs said. “We’re talking about a hum that resonates.”

The one measurement taken in the chamber illustrates why compliance with the standard did not settle the matter. During a quiet moment, the applicant’s expert recorded 43.9 dBA and 59.8 dBC. A-weighted decibels (dBA), common in noise rules, discount low frequencies roughly as the human ear does at moderate volume. C-weighted readings (dBC) count low frequencies more fully. A gap of about 16 decibels in an ordinary quiet room shows how much low-frequency energy an A-weighted limit can leave out. That is the kind of sound a round-the-clock campus of fans and chillers produces.

Seymour offered pre- and post-operation noise studies, with shutdown or mitigation if the project failed its conditions. That is a meaningful commitment on paper. However, it asks a board to approve first and verify later. Sachs said she could not accept the project without a scientist able to vouch for a comparable operating facility. That standard points developers toward bringing measured data from existing sites rather than modeled projections alone.

What the Denial Leaves on the Table

The economic case was substantial: a projected $34.5 billion asset at build-out over six to seven years, much of it in equipment and computers, and about $561 million in tax revenue at build-out. Commissioner Marino, the lone dissent, said, “I would say we need this.” Other commissioners did not dispute the size of the investment. They said the evidence on compatibility was incomplete, and Vice Mayor Woodward said approval would require “a lot more experts, conditions.”

Denial without prejudice keeps the project alive in principle. A resubmission would likely need to resolve the square-footage dispute with staff, identify the end user, explain the warehouse water figure and bring independent low-frequency noise evidence. The hearing also carried signs of how heated the local debate had become. Flores disclosed that his office had received threatening calls, and a court had denied an emergency request to block the hearing. Any developer returning to this site, or pursuing a similar one elsewhere in Florida, should expect a long and closely examined process.

Background

The Project Tango site in Loxahatchee was approved in 2016 for Economic Development Center uses and currently hosts heavy industrial operations, including asphalt and concrete plants. Residential growth has since surrounded it. The Arden community and Saddle View Elementary School now sit nearby, and opponents put the number of surrounding homes at about 2,400. Residents said they learned of Project Tango about eight months before the vote.

In Florida, land-use decisions like this one are quasi-judicial. Commissioners act somewhat like judges, weighing evidence presented at a hearing, and they must avoid appearing to have prejudged the case. The Project Tango fight reflects a wider pattern in which AI data centers, designed to run power-hungry computing around the clock, are testing local zoning codes written before such facilities existed at this scale.

Sources

Source: Palm Beach County commissioners reject controversial Project Tango AI data center (WPEC): CBS12 coverage of the July 15, 2026 commission vote on the Loxahatchee AI data center proposal.