GeoHealth.us is a website that tracks environmental pollutants and health risks at the neighborhood level. It combines data from sensor kits and authoritative sources to help users learn about potential exposures where they live and work. The site answers questions about what pollution is present, which factors could impact health, and whether pollution is improving or getting worse. It provides data on over 3 million facilities, 2 million pollution events, and 2.5 million locations tracked for chemicals, diseases, and other health risks.