A top New York hospital system has seen a stunning 75% spike in 9/11-related cancers over just the last three years — with 132 new cases in the first half of 2026 alone.

Northwell Health officials gathered Tuesday the Long Island Jewish Medical Center in New Hyde Park to sound the alarm on the massive jump in cases tied to Ground Zero exposure, saying doctors had seen 800 new cases in 42 months.

“The past is a prologue for a slow-motion health disaster as cancer cases have exploded,” a spokesperson for the hospital said.

The hospital, which serves patients throughout Long Island, the five boroughs, and Westchester County, saw its program’s 9/11-related cancers rise from 177 in 2023 to at least 235 in 2025.

By contrast, Northwell Health’s WTC program logged just over 1,630 cancer cases in its first decade since starting in 2013, according to the hospital. 

That total climbed to a staggering 2,445 cases as of June, officials said. The tally is by cancer, meaning one person may have several 9/11-related cancers at once.

In total, the system has just under 1,500 patients battling the maladies, according to officials.

The revelation came ahead of the 25th anniversary of the terrorist attack on Friday and in the wake of city Mayor Zohran Mamdani releasing 170,000 pages of long-hidden 9/11 documents on Ground Zero’s toxic air quality.

Those documents, released just hours before the doctors met on Tuesday, also revealed that past city officials may have known about the risks and misled the public regarding the toxic air in downtown Manhattan post-terror-attack.

“When officials declared the air ‘safe to breathe,’ we knew that couldn’t be true — we saw the dust, smelled the fumes, and understood the environmental catastrophe in front of us,” said Jacqueline Moline, a doctor and director of Northwell’s WTC Health Program.  

“Despite the care we’ve provided and the commitment everyone has shown, we must continue to recognize all of those who were exposed to the dust and fumes from the WTC, and continue to provide the care they deserve,” Moline added. 

In total since the attacks, cancer certifications among Twin Tower survivors, downtown Manhattan residents and workers on and near The Pile have exploded from 3,204 confirmed cases in 2015 to over 57,000 as of this year — skyrocketing nearly 1,700% — The Post previously reported.

Overall, roughly 10,000 first responders and survivors have died of illnesses tied to 9/11, according to September 11 Victim Compensation Fund data as of July 31.