NYC health department investigates Upper East Side Legionnaires' disease cluster

New York City health officials are investigating a cluster of ten Legionnaires’ disease cases that have been identified in the Upper East Side, specifically in the Carnegie Hill and Yorkville neighborhoods. The first two cases were reported on Thursday, and by Friday night the count had risen to ten, all within ZIP codes 10028 and 10128.

The city’s health department said all cooling towers in the affected area are being tested, and it confirmed that the outbreak is not linked to plumbing. Residents were advised that tap water remains safe for drinking, showering, cooking and running air conditioners.

Legionnaires’ disease, a form of pneumonia caused by inhaling water vapor contaminated with Legionella bacteria, does not spread from person to person. Symptoms can include fever, chills, cough and muscle aches.

"Legionnaires’ disease is deadly but can be effectively treated if diagnosed early," NYC Health Commissioner Dr. Alister Martin said. "New Yorkers at higher risk, including anyone who is 50 and older, those who smoke, or people with chronic lung conditions, should be especially mindful of their symptoms and seek care as soon as symptoms begin."

Health officials urged anyone who lives in or has visited the area since late June to contact a health care provider if flu-like symptoms develop. Those needing assistance finding a provider can call 311 or (844) 692-4692.