The New York City Health Department (DOH) is investigating a cluster of Legionnaires’ disease cases in Central Harlem and its neighboring communities. So far, according to reports, eight individuals have been diagnosed in the area, in four ZIP codes stretching nearly river to river: 10027, 10030, 10035, and 10037. Results for additional individuals still pending. So far, no fatalities have been reported.
The DOH, which announced its probe July 25, is actively sampling and testing water from cooling tower systems in the affected area to identify potential sources of the bacteria responsible for the disease. New Yorkers experiencing flu-like symptoms such as cough, fever, or difficulty breathing are urged to contact a healthcare provider immediately. Legionnaires’ disease is a type of pneumonia that is contracted by inhaling vapor that contains Legionella bacteria. It is not contagious and can be effectively treated with antibiotics if addressed promptly.
Legionnaires’ disease arises in warm-water environments. Common symptoms include fever, chills, muscle aches, and a persistent cough. Most instances of this disease are linked to plumbing systems that foster the growth of Legionella, such as cooling towers, hot tubs, and humidifiers.
“Any New Yorkers with flu-like symptoms should contact a healthcare provider as soon as possible,” Deputy Chief Medical Officer Dr. Toni Eyssallenne said in a statement. “Legionnaires’ disease can be effectively treated if diagnosed early, but New Yorkers at higher risk, like adults aged 50 and older, [and] those who smoke or have chronic lung conditions, should be especially mindful of their symptoms and seek care as soon as symptoms begin.”
Health officials emphasize the importance for individuals, particularly those over the age of 50 or with pre-existing lung conditions or smoking habits, to be vigilant about their health and seek medical advice if experiencing symptoms. It’s critical for residents and workers in the affected area to reach out to their primary care providers or urgent care if they show any signs of illness related to the spread of the disease.
The most recent local outbreak of Legionnaires’ disease was in September 2024 at an assisted living facility in Albany; that episode killed four people, according to the Associated Press.
