New York City has published roughly 170,000 pages of government records on the response to the September 11 attacks, opening a public portal two days before the 25th anniversary of the attacks and settling a multi-year legal fight over access to the documents.
What Is In the Release
The records, posted at nyc.gov/sept11docs, cover health effects, air quality monitoring, and the city’s cleanup response around Ground Zero in the months and years after the attacks. Among the material is the long-referenced Harding Memo, an internal document estimating tens of thousands of potential litigants over asbestos exposure and inadequate respirators for rescue workers, and a set of records the city said it could not locate for years despite repeated Freedom of Information Law requests until 68 boxes turned up in 2025. The release also includes files concerning the collapse of 7 World Trade Center.
A cleanup-era note included in the records said officials wanted to avoid using the word “risk” in public communications about Lower Manhattan air quality because it would undercut public confidence. A separate 2002 memo from a mayoral adviser flagged that dust in Lower Manhattan contained asbestos at low levels and warned that city guidance telling residents to clean with wet mops could expose them to contaminated material without protective gear.
The Legal Settlement Behind It
Mayor Mamdani’s administration settled two Freedom of Information Law lawsuits brought by the advocacy group 9/11 Health Watch, which had spent years fighting the city in court for access to these files. The settlement includes monthly meetings between the city and the plaintiffs over the next 12 months, agreed search terms for reviewing millions of additional pages, and a commitment from the city to cover the group’s attorneys’ fees. Millions more documents, some previously held by an insurance company involved in cleanup litigation, are now under review for future release.
Why It Is Happening Now
City Hall tied the release to the approaching 25th anniversary of the attacks. “The very least our city owes the families, survivors and first responders is transparency,” Mamdani said in announcing the portal. Corporation Counsel Steven Banks said the administration was responding to years of public demand for accountability over how the city handled information after 9/11. Rep. Jerry Nadler, whose district includes Lower Manhattan, pointed to what he called the Giuliani administration’s “intentional obfuscation of the truth” about air quality at the time.
The mayor’s fiscal year 2027 budget sets aside $34 million to build and maintain the records portal going forward, and the city said it is assigning staff to help residents and former responders connect with federal health coverage available under the Zadroga Act.
Sources: NYC Mayor’s Office · amNewYork · CNN
