Monitoring Summaries

Long-term Data Summary

The following document summarizes measurements taken of many air pollutants by the Environmental Protection Agency (EPA) and the New York State Department of Environmental Conservation (NYSDEC) in response to the World Trade Center Disaster. Included for each pollutant are pie charts showing how many measurements were below the protective screening level, maps, and discussion of how EPA set the screening level. The summaries reflect data that had been processed and validated through May 29, 2002; dates included in each chart reflect the date of the last validated result for each parameter.

The file is in Adobe Acrobat (PDF) format. For more information about this format, and to download the free Acrobat Reader program needed to view the summary, please see EPA's PDF page.

Long-term data summary (1.0 MB)

Charts and Maps

Access a series of charts and maps showing the results of environmental monitoring for several chemicals in the lower Manhattan area since September 11, 2001. The charts are available in two formats: HTML and PDF.

Daily Environmental Monitoring Summary

The U.S. Environmental Protection Agency (EPA) and other federal, state and local agencies have collected extensive environmental monitoring data from the World Trade Center site and nearby areas in Manhattan, Brooklyn and New Jersey. Daily summaries are no longer published, but EPA does provide the entire set of summaries and will post new data as they become available.

EPA completed its data collection at the Pentagon on September 29, 2001. The Pentagon data summary provides final details

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