Rapid Estimation of Air Concentrations for Health (REACH) Model

REACH (Rapid Estimation of Air Concentrations for Health) is a regional-scale model designed for air quality policy assessment. The main outputs of REACH are ambient PM2.5 concentrations and a policy impact metric (PM2.5 mortalities/tonne). The model is easily portable to different regions and allows for flexibility in adjusting the spatial resolution and input data. To alleviate data constraints, REACH includes scripts for processing global EDGAR emissions and global ERA5 meteorology data for the designated model region. The overall aim of REACH is to serve as an assessment tool to support air quality decision-making in developing countries. REACH is open-access and available on GitHub, with pre-computed model outputs for Southern Africa and also the United States.