Air Quality Data Catalog

Real-time and historical ground-level air quality measurements from EPA's nationwide monitoring network. Incorporates PM2.5, ozone, CO, and NO₂ with IMPROVE and CASTNet quality flags.

Near real-time active fire and thermal anomaly detections from MODIS and VIIRS instruments, providing global fire coverage within 3 hours of satellite overpass.

Hourly daytime air quality observations from geostationary orbit over North America, measuring ozone, NO₂, HCHO, and aerosols at unprecedented spatial resolution.

Integrated aerosol optical depth and composition data from AERONET ground stations and multi-satellite retrievals, supporting air quality and long-term climate research.

Multi-platform satellite imagery for detecting and tracking aerosol plumes, dust storms, and smoke events from both polar-orbiting and geostationary satellite platforms.

High-resolution 1 km aerosol optical depth retrievals from MODIS using a time-series algorithm, delivering enhanced accuracy over land and ocean surfaces worldwide.

Daily global column measurements of ozone, NO₂, SO₂, formaldehyde, and aerosol properties from NASA's Aura satellite at approximately 13 km spatial resolution.

Daily wildfire smoke plume extent polygons from NOAA's Hazard Mapping System, manually analyzed from satellite imagery to support smoke forecasting and public health alerts.

NASA's global atmospheric reanalysis providing consistent long-term records of aerosol composition, PM2.5, and trace gases from 1980 to present at 0.5° × 0.625° resolution.

Near real-time global composition forecasts of ozone, NO₂, CO, and fine particulate matter using the GEOS atmospheric model coupled with the GOCART chemistry module.

Vertical profiles of aerosol and cloud distributions from NASA's CALIPSO satellite, enabling 3D mapping of smoke, dust, and pollution layers at global scale since 2006.

Next-day AQI forecasts for ozone and PM2.5 issued by state and local air quality agencies across the United States, published daily through the AirNow forecast system.

Hourly aerosol optical depth and smoke detection retrievals from NOAA's GOES-East and GOES-West geostationary satellites covering the Western Hemisphere.

Hybrid Single-Particle Lagrangian Integrated Trajectory model for computing forward and backward air parcel trajectories to trace pollution transport pathways.

Comprehensive, triennial inventory of air emissions from all source categories across the United States, including point, area, mobile, and natural emission sources.

Daily global aerosol optical depth retrievals from the VIIRS instrument optimized for retrieval over bright desert surfaces and urban areas using the Deep Blue algorithm.