A seventh person has died in connection with a Legionnaires' disease outbreak on the Upper East Side, city Health Commissioner Dr. Alister Martin announced Thursday.

The NYC Health Department says 92 people have tested positive for Legionnaires' disease in the community cluster affecting the Carnegie Hill and Yorkville neighborhoods.

Of those cases, five people remain hospitalized, 67 have been discharged, 13 were not hospitalized and seven have died.

Martin said health officials remain confident the source of the Legionella bacteria has been eliminated.

"We are saddened to share that a seventh person has died from Legionnaires' on the Upper East Side. Our hearts are with their loved ones," Martin wrote on social media.

The Health Department has tested 183 cooling towers at 160 buildings in the affected ZIP codes. Officials say 77 cooling towers at 75 buildings initially tested positive for Legionella bacteria, and 59 cooling towers at 58 buildings tested culture positive, confirming the presence of live bacteria.

All culture-positive cooling towers have been cleaned and disinfected, according to the Health Department. In total, 124 cooling towers have tested culture negative.

Legionnaires' disease is a form of pneumonia caused by Legionella bacteria, which grow in warm water and can spread in building cooling systems, hot tubs and showerheads. In many cases, people contract the disease by inhaling tiny droplets of contaminated water; Legionnaire's doesn't spread person-to-person.

The illness is treatable, but it is fatal in about 10% of cases, according to the U.S. Centers for Disease Control and Prevention. 

Seven people also died and more than 100 were sickened during an outbreak last year in New York's Harlem neighborhood. The sources turned out to include cooling towers — devices sometimes used for cooling large buildings — at a city-run hospital and the site of the city's public health lab.