Technology and Science · 08 September, 2026 · 2 min read
Zohran Mamdani Releases 170,000 9/11 Air Quality Documents Showing Toxic Air Near Ground Zero
Mamdani released over 170,000 pages of post-9/11 air-quality records. Documents indicate officials knew about toxic air near Ground Zero and downplayed risks.
46 outlets, one story, no spin found.
9 of 11 outlets skipped it: city documents suggest asbestos was found nearly everywhere tested.
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9/11 Air Records Unveiled
New York City Mayor Zohran Mamdani released tens of thousands of long-guarded city documents on Tuesday, including the first 170,000 pages of records via an online portal about air quality after the September 11 attacks.
“asbestos was found "nearly everywhere" they tested near Ground Zero”
ABC News reported the documents show how first responders who rushed to the World Trade Center were likely exposed to dangerous toxins, and it said the material includes memos from city leaders and agencies going as far back as the Giuliani administration.
The BBC said Mamdani released 170,000 documents showing asbestos was found "nearly everywhere" they tested near Ground Zero, and it quoted Mamdani saying, "People got sick because the leaders they trusted lied and told them they were safe to breathe in toxic air."
CBS News added that the city launched its public online portal Tuesday with more than 170,000 documents from across government agencies dealing with post-9/11 and health risks, while officials assured the public the air at the time was safe.
Harding Memo and Lawsuits
The records include an October 2001 file known as the "Harding Memo," described by the BBC as an aide warning former Deputy Mayor Robert Harding that the city could face as many as 35,000 legal claims for its response to the attacks.
BBC reported the memo stated the city could be sued because health advisories caused individuals "to return to the area too soon (causing toxic exposure or emotional harm)".
CNN said the Harding Memo cited a Law Department estimate of about 35,000 potential plaintiffs, and it quoted the memo’s concern that "Health advisories caused individuals either to return to the area too soon (causing toxic exposure or emotional harm) or too late (causing economic hardship)."
ABC News and CBS News both said the release resolves litigation brought by 9/11 Health Watch, which sued the city to force publication of the records, and ABC News said the city announced a settlement of two lawsuits brought by the group.
What’s at Stake Next
Beyond the documents themselves, the BBC said the release comes as illnesses related to dust and smoke from the Twin Towers collapse have claimed more lives than the attacks themselves, and it quoted Mamdani standing next to Jon Stewart saying, "Administration after administration has ignored those calling for answers and clarity."
“Administration after administration has ignored those calling for answers and clarity”
ABC News reported the city will continue to use its resources to promote two federal programs established under the Zadroga Act: the World Trade Center Health Program and the September 11th Victim Compensation Fund.
CNN said the release resolves a lawsuit brought by 9/11 Health Watch, and it quoted 9/11 Health Watch executive director Ben Chevat saying the documents will give people what they need to access federal assistance and will help kick-start additional research on health outcomes.
CBS News said more documents are expected to be added on a rolling basis, and it described the files as expected to provide more evidence that concerns about toxic air persisted for months after the attacks.