Datasets

• Consolidated Human Activities Database (CHAD)

  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...

• Human Exposure Database System (HEDS)

  The Human Exposure Database System (HEDS) provides public access to data sets, documents, and metadata from EPA on human exposure. It is primarily intended for scientists...