Provisional — subject to revision

3333 Broadway Apartments (Towers A and B), Manhattanville, Manhattan, NY

Legionnaires’ disease outbreak · 2025-Jul 2026 · New York

2
Cases: 0
Deaths: Under Investigation
Status

Suspected source

apartment building hot water system (Other)

What happened

The NYC Health Department investigated 3333 Broadway, a five-building apartment complex in Manhattanville/West Harlem, after two residents were diagnosed with Legionnaires' disease within roughly one year. Testing pivoted from cooling towers to the hot-water system shared by Towers A and B, which tested positive for Legionella in early February 2026; remediation was ordered and the city was still monitoring as of late July 2026. This is a separate cluster from the summer 2025 Central Harlem cooling-tower outbreak.

Sources & coverage

In-depth reporting on this and other Legionnaires’ disease outbreaks is available from Pritzker Hageman’s Legionnaires’ disease resource center.

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Primary source: apartment building hot water system. Figures are provisional and may be revised or withdrawn by the reporting authority. This page is for information only and is not medical or legal advice.

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