So far, 76 people have been diagnosed with the disease since the outbreak was first identified. Seven patients remain hospitalized.
The family of one of the victims, an 88-year-old Air Force veteran who had been married for 50 years, is planning to sue the owner of the cooling tower linked to the source of the outbreak when it is identified.
The outbreak has been concentrated in ZIP codes 10128, 10028 and 10075.
Legionnaires' disease is treatable but 10% of people will die due to complications from the illness, according to the U.S. Centers for Disease Control and Prevention.
Last year, seven people died and more than 100 were sickened during an outbreak in New York's Harlem neighborhood.
Health officials are urging anyone experiencing pneumonia-like symptoms to seek medical attention.
Mayor Zohran Mamdani on Monday, continued to reassure New Yorkers that the water is safe to drink, bathe in, shower and cook with, and says it's safe to keep using air conditioners.
Legionnaires' disease is a severe form of pneumonia caused by Legionella bacteria, which can spread through contaminated water systems, including cooling towers. Older adults and people with weakened immune systems are at greater risk of developing serious illness.
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