Cooling towers on the Upper East Side

Hover over the dots to see the address, the date of the last city inspection and the date of the last Legionella test conducted by the building owner. The city conducted PCR testing as a part of its investigation into the 2026 cluster. The outlined towers tested positive as of July 10, 2026. (Inspection data as of April 17, 2026 and testing data reported by building owners as of May 21, 2026)

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PCR Test Results
Positive

A positive PCR test detects the presence of living or dead bacterial DNA and does not definitively indicate heightened risk to the surrounding area.

New York City's Department of Health and Mental Hygiene makes an effort to inspect all cooling towers once a year.

As of May 2026, building owners are required to test their towers for Legionella every 31 days while they're turned on. The previous requirement was every 90 days.

Data: NYC DOHMH
Map by Joe Hong (Updated Jul. 10, 2026)
Last updated on: July 10, 2026