Database Clearinghouse for Inventories and Emissions Factors (CHIEF) Share SHARE Facebook share Twitter LinkedIn Copy URL Email Download Download chief en Added on: 20 May, 2025 Breadcrumb Home Resource Library Clearinghouse For Inventories and Emissions Factors (CHIEF) The Clearinghouse for Inventories and Emissions Factors (CHIEF) is a collection of EPA resources dealing with air emissions data, estimates, monitoring, reporting, modeling and inventories.