A Legionnaires’ disease outbreak has affected over 100 residents in New York City’s Central Harlem neighborhood since July 25. The NYC Health Department has confirmed 108 cases, with five deaths reported. Investigators suspect cooling towers as the source of the bacteria, Legionella.
The outbreak is concentrated within ZIP codes 10027, 10030, 10035, 10037, and 10039, but most people in these areas are considered low risk. The city has sampled and tested water from all affected cooling towers, confirming 12 positive cases on August 14. Remediation efforts have been completed.
Legionnaires’ disease is caused by consuming contaminated water or breathing in water vapor with Legionella bacteria. It can be found in various plumbing systems, including cooling towers, whirlpool spas, and air conditioning systems. The disease is treatable but can be deadly, especially for vulnerable populations like smokers and those with weakened immune systems.
Symptoms of Legionnaires’ disease include flu-like symptoms, such as coughing, chest pain, and shortness of breath. The NYC Health Department advises those at high risk to seek medical attention immediately if they experience these symptoms.
The outbreak highlights the importance of regular maintenance and cleaning of cooling towers to prevent Legionella growth. As the investigation continues, residents in affected areas are urged to contact their healthcare providers if they have flu-like symptoms or concerns.
Source: https://eu.usatoday.com/story/graphics/2025/08/21/nyc-legionaires-outbreak-how-it-spreads/85757867007