Contaminant levels detected in air and dust samples from residential apartments near where the World Trade Center (WTC) towers once stood pose little health risk, according to a new report from the U.S. Agency for Toxic Substances and Disease Registry (ATSDR). The samples were collected from Nov. 4 to Dec. 11, 2001, and analyzed for contaminants associated with irritant effects in the respiratory tract or on skin or that could have long-term health implications. These included asbestos, fiberglass, and mineral components of concrete and building wallboard. Only the dust samples showed significantly higher levels of contaminants than what was found in comparison areas not affected by the WTC collapse, but even these levels were well below occupational standards, according to the report. Public Health Investigation to Assess Potential Exposures to Airborne and Settled Surface Dust in Residential Areas of Lower Manhattan can be accessed at www.atsdr.cdc.gov.