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.

Sharpton, along with civil rights attorney Ben Crump, plan to unveil a lawsuit Wednesday against a construction company that did work in Harlem – the epicenter of an outbreak that has killed five people and sickened more than 100.

“People should be able to depend on our hospitals and public spaces,” Sharpton told The Post. 5

“We clearly should be monitoring this more closely. We have to be diligent about it. We cannot allow this Legionnaires’ outbreak to be normalized.”

Cooling towers at Harlem Hospital filled with rainwater after several large July storms, but was left untreated — permittin

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