This page shows live fine particulate matter (PM2.5) and the US Air Quality Index (AQI) for Delhi, Delhi, India, averaged across 32 monitoring stations and updated every hour. Readings come from the Pakistan Air Quality Initiative’s monitoring network and partner monitors published through IQAir. Each hourly value is the average of the hour that just ended. Data on Hawanama is open: see the About page for downloads, the API and how to cite it.