air quality

explore air quality in your city and around the world. air quality data, collaboration tools, and technology solutions – powered by iqair.

airnow is your one-stop source for air quality data. our recently redesigned site highlights air quality in your local area first, while still providing air quality information at state, national, and world views.

hyper-local, real-time, public air quality map. visualize pm2.5 aqi in your area for free. useful to community scientists or air quality professionals alike, purpleair sensors are easy to install, requiring only a power outlet and wifi.

香港政府向市民發佈最新空氣質素健康指數,包括一般監測站和路邊監測站的即時資料和預測資料,歡迎市民瀏覽