What Was Communicated to the Public After September 11, What Did Officials Know?

As 25 years pass since the September 11, 2001 attacks, thousands of new documents released to the public in New York have brought the discussions that took place within city administration about air quality and health risks around Ground Zero after the attacks back into the spotlight. The documents reveal that officials expressed serious concerns among themselves about potential toxic exposure and lawsuits.

In the archive released to the public with the approval of New York Mayor Zohran Mamdani, there are also private correspondence and internal assessments conducted among city officials after the attacks.

The possibility of thousands of lawsuits was on the table.

In a memorandum dated October 2001, the assessments sent by a lobbyist working with the mayor's office to the deputy mayor drew attention.

The document states that city attorneys projected that approximately 35,000 people could be potential plaintiffs after the attacks, and about 10,000 of them might file formal claims.

One of the officials' concerns was that if the lawsuits were taken to court, juries and judges might rule in favor of the victims, awarding large amounts of compensation.

In the memorandum in question, it was assessed that potential lawsuits might not be limited solely to the direct consequences of the attacks, and that people who returned early to the area following health advisories and thereby were exposed to toxic substances could also initiate legal proceedings.

"Clean with a Mop and Cloth" Advice Sparked Debate

One of the most striking details in the documents was the advice given regarding the cleaning of houses and buildings around Ground Zero.

City officials had advised residents in the area to clean their homes with wet mops and cloths. However, in late 2001, asbestos was detected in some dust samples taken from the area, and asbestos removal was normally carried out by authorized professionals.

Another memorandum dated 2002 revealed the warnings that New York Representative Jerry Nadler had made to the city administration on the matter.

It was recorded that Nadler said the air quality in enclosed spaces around Ground Zero was not being adequately monitored and that this could leave the city administration facing lawsuits.

Stunning Warning in Internal Memo

In the 2002 memorandum, it was assessed that if Nadler's concerns were correct, the public might not be adequately informed about the real health risks in Lower Manhattan.

The memo also stated that at least the recommendation for people to clean their homes with "wet towels and cloths" should be discontinued, and that funding should be requested from the Federal Emergency Management Agency (FEMA) to professionally clean indoor spaces.

These exchanges show that while the city administration continued to issue public advisories, it was debating the legal ramifications of indoor air quality, toxic substances, and future health problems within the agency.

Nadler: 'Our Warnings Were Ignored'

After the documents were released, Jerry Nadler said that he and other officials representing the area around Ground Zero had warned local and federal authorities about the health risks that airborne toxic substances could pose immediately after the attacks.

Nadler said that the new documents showed that the city's intervention teams at the time and the residents of the area could face long‑term health problems, arguing that these warnings had not been taken into account.

During the September 11 attacks, New York City Mayor Rudy Giuliani did not respond to The Epoch Times’ request for comment until the time of publication.

Heavy Accusation from Mamdani

New York City Mayor Zohran Mamdani also used harsh language during the release of the documents.

Mamdani argued that people fell ill because the leaders they trusted told them the air was safe. When health problems began to surface, he claimed that victims did not receive adequate state support.

In subsequent years, the federal government established the September 11th Victim Compensation Fund for people injured or killed in the September 11 attacks or in the subsequent debris‑removal operations.

More Than 20,000 Files Have Come to Light

Among the documents made public, more than 20,000 files stored in boxes at facilities of the New York Department of Environmental Protection in 2025 are also included.

The release of the documents became possible after the two lawsuits filed by the group 9/11 Health Watch were settled.

The New York administration announced that the archive is not yet complete and that more documents will be released to the public in the coming months.

Despite a quarter-century having passed, the new documents show that the debate will continue not only over what happened on the day of the September 11 attacks but also over the air quality around Ground Zero afterward, exposure to toxic substances, and the health messages given to the public.