Three more buildings at the Melrose Houses in the Bronx are having water filters installed..
This, after tests came back positive for the bacteria that cause Legionnaires disease.
The bacteria was found in the hot water system.
Residents in the affected buildings will have to go without hot water until upgrades are made.
Earlier in the week, filters were installed at 681 Cortlandt Avenue after four cases of the disease had been reported in the complex.
Officials say the water is safe to drink, but they don't want to risk having people breathing in infected steam, which is how Legionnaires' is spread. Preliminary tests came back negative for the other five buildings of the complex