Meteorological Data

South Coast AQMD Meteorological Data for Dispersion Model Applications

For guidance related to using AERMOD for permit applications, please see the following:

Atmospheric dispersion models require meteorological data (i.e., winds, air temperature, atmospheric stability, mixed layer heights, etc.) to simulate the transport and dispersion of emitted pollutants.  South Coast AQMD staff has developed meteorological data for use with the U.S. EPA’s dispersion models ISCST3 and AERMOD.

Meteorological data developed for use in U.S. EPA’s air dispersion model ISCST3 are no longer available for download.  ISCST3 meteorological data files can only be obtained via special request.  After October 1, 2017, all risk assessments and criteria pollutant analyses should be conducted using AERMOD to comply with Rule 1401 requirements.

Newsletter Sign-Up

To receive updates on modeling guidance and data, please visit the South Coast AQMD Sign-Up page.  "Modeling Guidance and Data Updates" will be located under the Clean Air Plans/CEQA Updates section.

Meteorology Team
Newsletter Sign Up
Periodic newsletter updates via Email on a variety of air quality-related topics

South Coast Air Quality Management District

21865 Copley Dr, Diamond Bar, CA 91765



© 2024 South Coast Air Quality Management District