MAP: These Upper East Side buildings have tested positive for live Legionella
Jul 22, 2026
New York City on Wednesday released a list of 50 addresses where 51 cooling towers were found to contain live Legionella, the bacteria responsible for that deadly outbreak on Manhattan’s Upper East Side.
The results show that there may not be a particular source that started the outbreak, but r
ather multiple sources could have contributed to it.
The cooling towers that tested positive for the live bacteria have been fully cleaned, the Health Department said. The department said it would continue to update the addresses on its website as appropriate.
Upper East Side Legionnaires’ Outbreak
Zip codes highlighted below have been identified as part of the Legionnaires’ disease community cluster on the Upper East Side. Red circles identify buildings that have tested positive for live Legionella bacteria.
Source: NYC Health • Map: Annetta Stogniew
Full list of impacted addresses
These are the addresses that tested positive for live Legionella bacteria:
100 East End Avenue1660 Second Avenue300 E 79th Street445 E 86th Street180 East End Avenue1438 Third Avenue301 E 80th Street51 E 87th Street1381 Lexington Avenue1551 Third Avenue511 E 80th Street120 E 87th Street1486 Lexington Avenue980 Fifth Avenue238 E 81st Street125 E 87th Street1150 Madison Avenue1001 Fifth Avenue240 E 82nd Street501 E 87th Street1239 Madison Avenue1130 Fifth Avenue8 E 83rd Street168 E 88th Street1275 Madison Avenue1080 Fifth Avenue13 E 84th Street9 E 90th Street920 Park Avenue1045 Fifth Avenue145 E 84th Street410 E 92nd Street1020 Park Avenue1071 Fifth Avenue160 E 84th Street40 E 94th Street1249 Park Avenue135 E 79th Street7 E 86th Street200 E 95th Street1750 York Avenue155 E 79th Street401 E 86th Street235 E 95th Street1755 York Avenue201 E 79th Street444 E 86th Street115 E 97th Street1875 Second Avenue
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