• For Meteorological Data:  Click here to download the Meteorological Data Support Document.

The Meteorological Data Support Document includes a station map, wind roses, and other useful information needed when choosing and using meteorological data for the purpose of modeling. This document also includes links to ZIP files which contain canned meteorological data that can be used when performing dispersion modeling with AERMOD. These ZIP files include both Surface Met Data and Profile Met Data for 59 sites. The AERMOD met data is quality assured and compressed using the WINZIP utility, therefore, the data should also be expanded using the WINZIP utility.

AERMOD is now the preferred EPA regulatory dispersion model; therefore, only meteorological data to be used with AERMOD is available for download from this site.

When performing regulatory modeling for a stationary source, it is important to use data from the station most representative of conditions at the source location. The representativeness of a station is often measured by proximity. However, proximity alone DOES NOT guarantee that a particular station is the most representative station available. The AQD can be consulted to help identify which monitor is the most representative for a specific modeling demonstration.