Models shared here are generally derived from publicly available concentration measurements from regulatory monitors. (In the U.S. these measurements are collected by EPA, state, local, and tribal agencies and made publicly available via the U.S. EPA Air Quality System). The models also use information about land use (for example, locations of major and minor roads; elevation; and whether an area is urban or rural) and in some cases satellite-derived estimates of air pollution.
The tables below summarize peer-reviewed large-scale empirical models, and provide links to access model concentration estimates if they have been made publicly available. In some cases, there is more than one model available for a given pollutant and year. Those models have been developed by different research groups, using different methods, or are applied at different spatial locations. We expect that users will familiarize themselves with corresponding publications, and encourage them to contact researchers (contact information provided below) for questions about the data provided, or to request customized data sets via formal collaboration.
Thank you for your interest. If you have suggestions for improvement or have model estimates you would like to share here, please contact us (Matthew Bechle).
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