EMFAC Web Database

The EMFAC Web Database provides a quick and easy way to access commonly used EMFAC emissions and emission rates data without having to install and run the EMFAC model. The Web Database contains daily emissions and emission rates data for all areas, calendar years and seasons generated from the EMFAC model. The Web Database currently does not include hourly emissions data or emission rates data by temperature and humidity, for these use cases please download and run the EMFAC model.

Note: Both EMFAC2011 and EMFAC2014 versions of the Web Database are available now. The most recent approved version is EMFAC2011. ARB has recently submitted EMFAC2014 to USEPA for its review. USEPA approval is expected by the end of 2015. USEPA will provide a transition period during which either version may be used. Therefore, in anticipation of USEPA approval, use of EMFAC2014 before the end of the year is appropriate.


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