The following is a brief description of the emissions inventory data in zipped/compressed files available for download.

The MAPRS (Michigan Air Pollution Reporting System) for 1990 through 1997 zipped MS Access 2000 database is in the MAPRS format and support documentation such as the data dictionary is included with the download.

The MAERS (Michgan Air Emissions Reporting System) for 1998 through 2005 MS Access 2000 database is in the US EPA NIF 3.0 (National Emissions Format) and a separate download file with support documentation such as the NIF codes and data formats is available for download as zipped files.

The complete 2005 Michigan DEQ AQD point source emissions inventory as submitted to US EPA in NIF 3.0 format is also available for download in a zipped MS Acccess 2000 database.

Please see the readme documentation files provided with each downloaded zipped file.