The medical consequences emerged slowly, then all at once. Firefighters, police officers, and construction workers who had spent weeks or months at Ground Zero began presenting with respiratory conditions that had no prior history. Cancer rates among Ground Zero workers climbed above the population baseline in ways that epidemiologists found statistically significant. Mental health conditions — PTSD, major depressive disorder, anxiety — were prevalent in a workforce that had experienced sustained exposure to mass death while working in conditions of high physical stress.
The World Trade Center Health Program, established under the James Zadroga 9/11 Health and Compensation Act of 2010, exists specifically to monitor and treat those conditions. The program is administered by the National Institute for Occupational Safety and Health (NIOSH), a division of the Centers for Disease Control. As of March 31, 2024, the program had enrolled 132,530 members, including 88,014 responders and 44,516 survivors. Of those living members, 79,493 had been certified as having at least one WTC-related condition. More than 55,000 held aerodigestive certifications. More than 35,000 had certified cancer conditions. More than 22,000 had certified mental health conditions.
The program’s deceased member count, as of March 2024, stood at 6,897 — people who had enrolled in the program and subsequently died. Not all of these deaths were directly attributable to Ground Zero exposure; the program tracks all-cause mortality. But the number of deceased members with certified WTC-related conditions was 4,449 — nearly a third of the total enrollment’s deceased. These are the people whom the coworker’s grim prediction at the rubble pile was about. Many of them died years or decades after September 11, from conditions they developed because of what they breathed and ingested in the weeks and months they spent working at the site.