Sixth Fatality Reported in Upper East Side Legionnaires’ Outbreak

A sixth individual has died following a Legionnaires’ disease outbreak on the Upper East Side, according to the New York City Department of Health and Mental Hygiene. The cluster, which began in early July, has resulted in 90 confirmed cases of the severe respiratory illness.

City Health Commissioner Dr. Alister Martin confirmed the additional death on Tuesday evening. While the outbreak has led to more than 70 hospitalizations, officials noted that only six patients remained under medical care as of July 28. Health department data indicates that the spread of the disease appears to have stalled, with no new cases diagnosed since July 17 and no reported symptoms in over two weeks.

"We continue to believe the source of exposure has been eliminated," Dr. Martin stated in a public update.

Investigators are currently focused on identifying the specific origin of the bacteria, which is transmitted when individuals inhale mist contaminated with *Legionella*. The health department has conducted extensive testing of water-cooling towers within the 10028, 10128, and 10075 ZIP codes. To date, 56 buildings have been found to house cooling towers containing live *Legionella* bacteria. Owners of these properties have been mandated to perform immediate drainage, cleaning, and disinfection procedures.

While these measures are intended to mitigate further risk, officials acknowledge that additional testing is required to pinpoint the exact tower responsible for the cluster. This incident marks the second fatal outbreak of the disease in Manhattan within the last two years, following a 2025 event in Harlem that resulted in seven deaths. Despite strict municipal regulations governing the maintenance of cooling towers to prevent bacterial growth, the recurrence of such outbreaks remains a significant public health concern.