Can diffuse data be compared to facility data?
Diffuse data provides an indication of the emissions from non-reporting facility sources for the regions for which studies have been undertaken. Although reflecting the most up-to-date information, diffuse data may not be as current as NPI information for particular facilities, which is provided annually. For example, diffuse data may be from a study completed in 1998-99 and the facility data from 2004-05. This needs to be considered if you wish to study pollutant emissions from a specific region.
