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Consolidated Human Activities Database (CHAD)

Published by U.S. EPA Office of Research and Development (ORD) - National Exposure Research Laboratory (NERL) | U.S. Environmental Protection Agency | Catalog Last Checked: May 01, 2026 at 06:07 PM | Dataset Last Updated: January 01, 2014
The Consolidated Human Activity Database (CHAD) contains data obtained from human activity studies that were collected at city, state, and national levels. CHAD is intended to be an input file for exposure/intake dose modeling and/or statistical analysis.

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