Interim Criteria Emissions Updates

This page last reviewed March 13, 2013

The California Almanac of Emissions and Air Quality, as well as data links on the Air Resources Board's emissions data homepage, contains information on past, current, and future emissions from stationary, area-wide, and mobile sources of air pollution. These emissions estimates represent the best available information at the time the data are collected. These data are a "snapshot" of the emissions inventory database at one point in time. Staff of the ARB is continually updating and improving inventory data, so the emissions data presented in the Almanac may not be the most current emissions estimates available.

ARB's Updated Categories page provides access to the most recent changes to our emissions inventory database by category. As improved data become available, this website will be updated and the newer data incorporated into the following year's Almanac.