AIR4US is a multi-agency initiative, integrating authoritative air quality data to support local action and real-world decisions.
Visualize
Near real-time PM2.5 smoke forecasts from wildfires across North America.
Explore
AgencyEvaluates atmospheric chemistry and air quality models against observational datasets — surface monitors, aircraft, and satellite retrievals. Configure via YAML to generate diagnostic plots, spatial maps, and bias statistics.
AgencyOverlay and animate satellite observations of global aerosol and air quality events, including wildfires, dust storms and haze.
AgencyOn-the-fly access to multi-terabyte air quality datasets. Reprojects and regrids satellite, model, and in-situ data onto CMAQ-compatible grids with full 3D visualization.
AgencyStandard EPA system for preparing model-ready gridded, speciated, hourly emissions for CMAQ, WRF-Chem, and CAMx from the National Emissions Inventory.
