Citation:

Impact/Purpose:

EPA uses this product in the 1999 National Scale Assessment of the National Air Toxics Assessment, which estimated ambient concentrations, exposures, and health risks to hazardous air pollutants.

Description:

The product is a data set of estimates of 1999 emissions of hazardous air pollutants for every county in the US, with sufficient detail on source characteristics to support dispersion modeling, projection to future years, etc. To support NSA/NATA the inventory must be delivered in a specific form and format to interface properly with the ASPEN dispersion model.

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