NYC Releases 9/11 Air Quality Records

New York City Mayor Zohran Mamdani’s administration has released more than 170,000 pages of previously withheld records on air-quality tests, contamination findings, health risks and the city’s response after the September 11 attacks, days before the 25th anniversary. The records, recovered from 68 boxes reportedly found in 2025 after years of unsuccessful requests and lawsuits including those by 9/11 Health Watch, indicate officials recognized toxic-exposure risks and potential liabilities near Ground Zero and the Fresh Kills landfill while publicly describing the air as safe. They include the Harding Memo, which estimated about 35,000 potential plaintiffs and 10,000 possible claims involving toxic exposure, inadequate protective equipment, health advisories and other alleged failures. Mamdani acknowledged that New Yorkers were misled and said the city would continue publishing records and helping eligible residents access health care and compensation programs; advocates and lawmakers said the files reinforce longstanding warnings that contaminants sickened first responders, survivors and nearby residents. More than 9,400 people have reportedly died from illnesses linked to exposure around Ground Zero, according to a federal monitoring program, though the released files represent only part of the city’s air-quality records. The city has allocated up to $34 million to process the records, while its Department of Investigation examines what authorities knew and why information was withheld; separate federal watchdog findings said the EPA’s 2001 assessment that the air was safe was not adequately supported by available data but did not determine that officials knowingly lied.