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Mamdani Releases 170,000 Pages of 9/11 Records as Air Quality Claims Resurface
Nearly 25 years after the 9/11 attacks, New York City, under Mayor Zohran Mamdani, has opened more than 170,000 pages of files previously unavailable, records that could reshape the story of what officials knew about toxic air around Ground Zero.
Mayor Zohran Mamdani launched the city’s first public portal dedicated to 9/11 records and files on September 8, releasing an initial trove covering air quality, health concerns and the city’s response to the attacks.
The records include the controversial Harding Memo, documents from 68 boxes that officials say were not located until 2025 despite previous Freedom of Information Law requests, and records concerning World Trade Center 7.
The release comes days before the 25th anniversary of the attacks that killed nearly 3,000 people.
Did Officials Know More About the Toxic Air?
The biggest question surrounding the documents is brutally simple: what did New York City officials know about the air around Ground Zero and when did they know it?
Records reviewed ahead of the public release by The New York Times reportedly include air-quality reports, contamination records, and internal correspondence suggesting that evidence of hazardous substances persisted after the attacks, even as the public received assurances about air safety.
The newly released material includes documentation concerning asbestos and other contaminants around Lower Manhattan.
The city’s own announcement says the portal is intended to provide greater transparency concerning the government’s response and the health consequences of the attacks.
https://t.co/xo8PaNzlap
Mayor Mamdani Holds Press Conference to Make a 9/11-Related Announcement— Mayor Zohran Kwame Mamdani (@NYCMayor) September 8, 2026
The “68 Boxes” Mystery
One of the most explosive elements is not necessarily a single document but the existence of 68 boxes of records.
According to the city, those records were not located until 2025, despite multiple FOIL requests.
The boxes are now part of the public release, potentially giving researchers, survivors, journalists and families access to material that had remained outside public view for decades.
The city says it will review more records, redact them where necessary, and publish them on a rolling basis over the coming year.
The Harding Memo Raises Liability Questions
Among the documents is the so-called Harding Memo, an October 2001 document concerning potential legal and legislative responses to the attacks and possible city liability connected to toxic exposure and safety equipment.
Its existence has renewed scrutiny over how city officials were thinking about health risks and potential lawsuits in the immediate aftermath of 9/11.
That does not, by itself, establish that every official knew the full extent of the health dangers or deliberately concealed information. But advocates say the records could provide important evidence about the decision-making process.
Jon Stewart Joins Mamdani at City Hall
Longtime 9/11 first-responder advocate Jon Stewart appeared alongside Zohran Mamdani during the announcement.
Jon Stewart has spent years pushing for greater recognition and support for people who became sick after working at Ground Zero.
The release also follows a lengthy legal battle involving 9/11 Health Watch. Zohran Mamdani’s administration announced settlements resolving two lawsuits over records concerning post-9/11 air quality and health risks.
The city has allocated roughly $34 million to create and maintain the public records portal.
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Thousands Still Living With 9/11 Health Consequences
The records arrive as New York continues to document the long-term health impact of the attacks.
A September 1 report from Mamdani’s administration and the FDNY said more than 10,000 FDNY members have been certified with a 9/11-related physical health condition. The report draws on 25 years of medical monitoring and treatment.
The World Trade Center Health Program continues to provide monitoring and treatment for eligible responders, survivors, and others affected by exposure.
Mamdani has emphasized that the number of people who have died from 9/11-related illnesses has now surpassed those killed on the day of the attacks.
Mamdani Faces a Political Storm of His Own
The release also lands at a politically sensitive moment for the mayor.
Zohran Mamdani is facing criticism over his planned attendance at New York’s 9/11 remembrance ceremony, with some families and Republican politicians objecting to his past statements and political associations.
The controversy has included criticism of his response to the phrase “globalize the intifada” and attacks surrounding his administration’s personnel choices.
Mamdani has nevertheless said he intends to attend the commemoration and has emphasized his focus on victims, families and first responders.
His administration’s release of the records gives him another opportunity to define his approach to the 25th anniversary: open the files, confront the city’s past and let the public examine the evidence.
The 9/11 Files Are Only Beginning
The most important revelation may not have been published yet.
New York says it will release additional records as it reviews them and removes personally identifiable information.
That means the 170,000-page disclosure could become the first chapter in a much larger examination of what happened after the towers fell and what government officials knew about the toxic aftermath.
For survivors and families who have spent decades demanding answers, the question is no longer simply what happened on September 11, 2001.
It is what happened in the months and years afterward and why it took nearly 25 years for some of those records to become public.
