New York City issued no cooling tower violations in the three ZIP codes covering the Upper East Side during four separate months of this year, City Council Speaker Julie Menin said at an oversight hearing on the outbreak Wednesday, months before a Legionnaires' disease cluster in those same ZIP codes killed 11 people and sickened 94.
Citing reports, Menin said that "the department issued no violations in the three zip codes covering the Upper East Side" in January, March, May and June of this year. She said enforcement surged after July 2, when the outbreak began, but that there was almost no enforcement in the first half of the year.
For tenants and building residents, that is a specific and checkable claim about a specific place. It reframes the outbreak from a public health event that happened to a neighborhood into a question about whether a rule already on the books was being enforced in the months before people got sick.
The Inspection Numbers Behind the Complaint
The enforcement picture presented at the hearing extends well beyond one neighborhood. Lynn Schulman, the Queens council member who chairs the health committee, said cooling tower inspections by the Department of Health and Mental Hygiene have declined by more than 50 percent since 2017, falling from about 5,000 annually to 2,300 in 2025.
Unpaid penalties compound the problem. Schulman said roughly $5.1 million in cooling tower violation balances remain outstanding, including about $1.5 million tied to public health hazard violations, citing data from the Office of Administrative Trials and Hearings. None of that reporting, she said, produced aggressive enforcement before this year's cluster.
The rules themselves had just been tightened. New Legionella testing regulations that took effect May 8 require building owners to test every 31 days while a cooling tower is operating, three times more often than before, and raise fines for owners who miss the schedule. Those laws were a response to a 2025 Legionnaires' cluster in Harlem that killed seven people and sickened 90.
The Health Department's Account
Health Commissioner Alister Martin defended the response once the cluster was identified. He said the department mobilized and tested all 183 cooling towers in the affected ZIP codes, disinfecting 83 that returned positive PCR results while confirmatory bacterial cultures were still pending. That approach, he told the committee, was more aggressive than any the city had taken before.
Martin said publishing the addresses of buildings that tested positive increased compliance, and that the department issued 180 summonses to 78 buildings with a combined face value of $177,000 during the outbreak. He said the city did not wait to act this summer and is not waiting now.
Both accounts can be accurate. The department's response after July 2 was unusually aggressive by its own historical standard, and enforcement in the preceding months was, by the Council's account, close to absent. The hearing did not resolve which shortfall, if either, allowed the bacteria to grow.
Testimony from a Family and the Human Toll
The clearest account of what the numbers cost came from a family. Charles Thomas, a former Queens County judge who had retired to the Upper East Side, died in the outbreak at age 92. His son Daniel Thomas told the committee that his father described his illness as a completely preventable act of violence done to him, and said he wanted his death to produce change.
Legionnaires' disease is a severe pneumonia caused by Legionella bacteria that grow in building water systems, including cooling towers. It spreads when people inhale contaminated mist, not from person to person. People over 50 or with weakened immune systems face the highest risk of serious illness, and without early detection, the disease can be fatal.
That risk profile explains why this cluster was so lethal. The affected neighborhood has a large older population. Tap water, showering, and home air conditioning in the area were never implicated and have consistently been described as safe.
Practical Steps for Renters and Building Residents
Residents are not without recourse. New York City maintains a public cooling tower registry and publishes inspection results searchable by address, so tenants can look up their own building and nearby properties. Anyone who finds an unregistered tower or a building with a long gap in Legionella sampling can report it through 311. Council members have also proposed a package of new Legionnaires bills since the outbreak, and families affected by the cluster testified about the pace of the city response.
MedicalDaily previously reported that the cluster closed with eleven deaths and no source tower publicly named. That remains true. Martin said the final step is matching patient DNA to DNA recovered from the infected towers, with results expected this fall.
Symptoms usually appear two to 14 days after exposure and include fever, cough, shortness of breath, muscle aches and headache. Anyone in a high-risk group who develops fever with respiratory symptoms should contact a clinician and mention possible Legionella exposure, because the test is not part of a routine pneumonia workup. Chest pain, trouble breathing or confusion requires urgent care.
Several questions are still open. No cooling tower has been publicly identified as the source, no negligence has been established in court, and the Council has not voted on the new bills proposed after the outbreak. Whether the genetic matching identifies a single tower, and whether the city commits to restoring inspection volume, are the two developments worth watching this fall.
Key Questions Answered
What did the Council hearing reveal? That no cooling tower violations were issued in the three Upper East Side ZIP codes during four months of this year, and that citywide inspections have fallen by more than half since 2017.
How many people died in the outbreak? Eleven people died, and 94 were sickened in the Upper East Side cluster this summer.
Has the source been identified? No. Genetic matching between patient samples and tower samples is underway, with results expected this fall.
Is the water in my apartment safe? Yes. Legionnaires' spreads through mist from cooling towers, not from tap water, showers or home air conditioning, and it does not pass between people.
Who is most at risk? People over 50 and those with weakened immune systems face the highest risk of serious illness, according to city officials.
Can I check my own building? Yes. The city publishes cooling tower registration and inspection results searchable by address, and unregistered towers can be reported through 311.
What happens next? The Council is considering new Legionnaires' bills, and the Health Department expects the DNA matching results this fall.
