NEI (National Emissions Inventory)

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National Emissions Inventory (NEI) is a national database of air emissions information with input from numerous state and local air agencies, tribes and industry. These data are used for air dispersion modeling, regional strategy development, regulation-setting, air toxics risk assessment, and tracking trends in emissions over time.  Clean Air Act (CAA) collection of point, area, mobile and biogenic emissions data periodically submitted to EPA’s Office of Air and Radiation by State and local air programs.