Victims of the deadly Legionnaires’ disease outbreak gripping Harlem will sue the Big Apple for allegedly letting bacteria fester in city-owned cooling towers, it was announced Wednesday.

Lawsuit filed after a deadly Legionnaires' outbreak in Harlem, alleging negligence by construction firms and NYC.

Rainwater left untreated in cooling towers atop city-owned Harlem Hospital fueled the Big Apple’s deadliest Legionnaire’s disease outbreak in a decade, the Rev. Al Sharpton charged Tuesday.

According to the lawsuit, the companies failed to properly clean storm water from cooling towers at Harlem Hospital.