Upper East Side Legionnaires' cases now at 14, health department says

ByEyewitness News WABC logo
Monday, July 6, 2026 3:37AM
Upper East Side Legionnaires' cases now at 14, health department says

UPPER EAST SIDE, Manhattan (WABC) -- There are more cases of Legionnaire's Disease on Manhattan's Upper East Side.

The city's health department now puts the number at 14 and added the 10075 zip code to the cluster zone.

Mayor Zohran Mamdani says the infections are not related to any buildings' plumbing or air conditioning. He says it is safe to drink, bathe and cook with tap water.

The Health Department is testing water from cooling towers throughout the affected area. Officials say past outbreaks have been linked to Legionella bacteria spreading through mist released by contaminated cooling towers. Building owners whose systems test positive will be required to conduct remediation.

Health Commissioner Dr. Alister Martin urged anyone who lives, works or has visited the area since late June to seek medical attention if they develop symptoms including fever, cough, difficulty breathing or other flu-like illness. A health alert has also been sent to medical providers, and community outreach efforts are scheduled to begin this weekend.

Legionnaires' disease is a type of pneumonia caused by Legionella bacteria, which grow in warm water. People become infected by inhaling contaminated water vapor, not through person-to-person contact. The disease can be treated with antibiotics when caught early, and officials stressed that it remains safe to use air conditioners, cooling centers, city facilities and tap water in the affected neighborhood.

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