Chilaw
Chilaw Divisional Secretariat (by CEA) is an air quality monitoring station in Chilaw, North Western, Sri Lanka (7.5722°, 79.8016°). Hawanama shows its hourly fine particulate matter (PM2.5) concentration in µg/m³ and the matching US Air Quality Index, plus the last 24 hours. Each hourly value is the average of the hour that just ended. See all monitors and the city average on the Chilaw air quality page. Data is open; see About for downloads, the API and how to cite it.