# Guggenheim among 31 Upper East Side sites that tested positive for Legionella bacteria

> **Open Intelligence Dossier** · First detected: 2026-07-11 17:07 UTC · Category: Health

## Executive Summary
Legionnaires' disease outbreak in New York City widens as the Guggenheim Museum and other Manhattan sites test positive for Legionella bacteria.

## Intelligence Brief
Among these affected locations is the Guggenheim Museum, where coverage indicates that the bacteria were found within the building's cooling towers. The spread of the bacteria has also extended to the Upper West Side, where a building's hot water system has tested positive for the presence of the bacteria. Reporting from a wide array of outlets including NBC News, AP News, and PBS highlights the expanding scale of the health crisis. USA Today specifically notes the role of cooling towers at the Guggenheim, while ABC7 New York and the West Side Rag focus on the Upper West Side development. According to the West Side Rag, a memo revealed that the hot water system in an Upper West Side building tested positive for the bacteria.


ABC7 New York further clarifies that this specific building independently discovered the Legionella bacteria within its hot water system, indicating a broadening geographical scope of the contamination beyond the initial Upper East Side clusters. This situation is critical because Legionnaires' disease is a severe form of pneumonia caused by the Legionella bacteria, which often proliferate in man-made water systems. The presence of the bacteria in diverse infrastructure—ranging from the high-capacity cooling towers of a major institution like the Guggenheim Museum to the residential or commercial hot water systems of buildings on the Upper West Side—suggests multiple points of failure in water management. The increase in the case count to 56 reflects a growing public health challenge for the city as officials attempt to identify and mitigate all contaminated water sources. Future developments will likely center on the identification of additional contaminated sites and the implementation of remediation efforts.


Coverage from amNewYork indicates that the outbreak continues to evolve as new locations, such as the Upper West Side building, test positive. Observers will be monitoring whether the case count of 56 rises further and whether more buildings on the Upper East Side or other Manhattan neighborhoods are linked to the bacteria. The focus remains on the containment of the Legionella bacteria within the city's cooling and heating infrastructure to prevent further infections.

## Multi-Source Evidence Table
| Source Outlet | Headline | Verification URL |
|---|---|---|
| amNewYork | Legionnaires’ disease outbreak: Case count reaches 56 as Upper West Side building now tests positive for the bacteria | [Source Link](https://news.google.com/rss/articles/CBMiiwFBVV95cUxPMDY4cmNJUmJ2bHFIUmQyd0k0VF8zNmhuQzE1N0ZIaGdQcVZsTDF4bUdIVnhmdl9wV0U3N3VIVV9MUGdCN0hPX0ZIenUtRzFJNVgzd1BMRmRjUk1EVFl3aFFxZlBhZ05VMTZLZDY4OXh2VFk5Tl9NRmxpWUtHTzZRVlg3cjNQU2JjN1I4?oc=5) |
| PBS | Guggenheim Museum among NYC buildings that tested positive for Legionnaires' amid disease outbreak | [Source Link](https://news.google.com/rss/articles/CBMizgFBVV95cUxQNE5TOHloU0dwVk1IUThSZ05EaEF2T25RTk5NSFo2RjJXMktWVmEtS0xPdmd0elZNYjhCaUlYN0MzZmtZbXNqMXYzSGZFdFpoV2txc2haTUlaNkg5VHFSdnNBMks3RzdpQ1phelJuQVNrWVAtMV9uNE5pamNDRGwyTmtreWhEWjQ4UlgtOXR0Y1hocWV2VVR1dWkzWnh5eFNhSkZoY1VFcTJrc2k1TGg1SUdZWkdOZ20xcTM0VXpMamI0bFY0WTdacFZuYnNDdw?oc=5) |
| ABC7 New York | NYC Legionnaires' outbreak: Upper West Side building independently finds Legionella bacteria in hot water system | [Source Link](https://news.google.com/rss/articles/CBMi5AFBVV95cUxQRVJWN01OMWxQSC1Jdmw4Mlc1eU1tRHJDZ1J4d1E5bUtFdkRacGRmZWVKYjAwYUlIeHY5ZUg3dFNLb1FoTGVyRmhWLVhPdld6YW5GOS02U2ZORGtMdGJKd21uLXd1LVcyZEdaNG1FX0gxY1I4bW42aldoOFdFZ2ZPRm1wOTlLaUVieXFWSkFqYXJIcTFLeF9hMTNhd29wNmllOGRGMUV1V2VzSDBHaHhEY3J4bXFvS1VOVllnWElYNnc3blJJdUN2YmQ5TGgyNkpkN0tBVWpROWpDRjlTSFMyeFlua2rSAeoBQVVfeXFMT2pUTEJoU0M5dUp5VGJ4cTZ4QmxTZHpaRUtlZjlRU3pjeWNWTFMwd3I0a3ZOUTBhd0RRMml4MXE4bVZsdUcyWloyOEhQdkwwdUJtdGZsOHpuMnQwWExRSzg0ZlI2OHA1ZktSOUotelJ) |
| West Side Rag | UWS Building’s Hot Water System Tests Positive for Legionella Bacteria, Memo Shows | [Source Link](https://news.google.com/rss/articles/CBMiuwFBVV95cUxOOVFsR21QaTZ1WjVjX0ZKcUpIVnN0aUU5STNHNzE3em52REFwUGxmV0ttWWZpRDIyU2UwaWdINmdnWGtJcE5IdkkzMW4xcHdTWXFXVUhyeV8zRW5neFlMSUZlcFdxdkY0TWFHOWh6cHBjZTluSDlRalYzcjEyRTk2dW1famxqVE1vRXFWZUFEQUEtd1V4bGRqYXpUazg0N08tbVlsTUNWWUVFcmpGdkNBbW1mX1Nwd0VrUTZv?oc=5) |
| AP News | Guggenheim Museum among NYC buildings that tested positive for Legionnaires’ amid disease outbreak | [Source Link](https://news.google.com/rss/articles/CBMiswFBVV95cUxOcXhJaVNleDBqZXppSVhuLUs4eTQwRDRudmdWRVFFVHZ3SEJLdWtMZnlFNVA5MmpwR2JRZmVKRVpqM3VHOGFhYkUxNmxfRUhtUHZvTHBxTEg4RXBzalNjMXUtYmpOUVBfaXdwam96UHh5eXVla2JtN0xMMHc0d3B6SnB4cGhneDREcjh0ZG9odjA5WWQ2cmpFSWFZNDFmTkx1dHFFMjZxZ19BcGJJT0lkcm9GTQ?oc=5) |
| USA Today | Guggenheim among NYC buildings with Legionella found in cooling towers | [Source Link](https://news.google.com/rss/articles/CBMioAFBVV95cUxPZ3UtdnR5TnZJdEdySDZBZHFfMjBVRDROdnZreV91QzBkajRRdGd2djJuS2d6R3VPaWlyX0dILU42X0dHOHNGdmpTTXdzRnREbFRNNjFMeFAwS045a2FPa0RXd3lRT25FMjl3OUE1WFMzbDNVdUI0amQ1Y01JZnY4QzBPWTNWMHRaSU1uaWxCN0o0MVZwRThQOEVVcFJ0LXNS?oc=5) |
| NBC News | Legionnaires’ disease outbreak widens on Manhattan’s Upper East Side, Guggenheim among sites affected | [Source Link](https://news.google.com/rss/articles/CBMiogFBVV95cUxQb2c0eDRiSXBTVWZqYTJ6TkZabjg0QWh1Nm9HWWY2dzhmYm9Uanh1YjI5Z1R1YV8tbFE2VTlkM09JSl9HY0tYc1pia0QtbTlQeVNBRFhuYWNXNEpNVDVrSGxNTnFYSVQydEpvTmdaTUp5TzNiV09RUVdHenpuWXhiel91eWU5dkgwWUFrWmtrczJXRVl3bG9kRUdXaFRDbUtNTXc?oc=5) |

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*Canonical Source: https://pulse.byoviral.com/trend/2026-07-11/guggenheim-among-31-upper-east-side-sites-that-tested-positive-for-legionella*