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 | Metadata Last Checked: July 11, 2025 | Last Modified: 2014-01-01

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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Complete Metadata

bureauCode	[ "020:00" ]
dataQuality	false
identifier	{25B6EC2E-51D5-4691-A4C6-8249268DBEB3}
issued	2014-01-01
landingPage	https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=%7B25B6EC2E-51D5-4691-A4C6-8249268DBEB3%7D
programCode	[ "020:072" ]
references	[ "https://edg.epa.gov/metadata/catalog/search/resource/details.page?uuid=%7B25B6EC2E-51D5-4691-A4C6-8249268DBEB3%7D", "https://edg.epa.gov/metadata/rest/document?id=%7B25B6EC2E-51D5-4691-A4C6-8249268DBEB3%7D" ]
spatial	-180.0,18.0,-66.0,72.0

Location