Live from 1,222 cities
Know your air before you step outside
Live AQI from official monitoring stations, with health advice, forecasts and weather alerts. Free, no login.
Popular cities
All citiesLive trackers
See allRight now, worldwide
World rankingMost polluted right now
Air quality by country
All countries- 76NAQIIndiaMedian of 262 cities · worst Ballabgarh 257
- 29US AQIUnited StatesMedian of 276 cities · worst Pittsburgh 156
- 36China AQIChinaMedian of 341 cities · worst Artux 259
- 144US AQIIndonesiaMedian of 90 cities · worst Kabupaten Barito Selatan 500
- 88US AQIUnited Arab EmiratesMedian of 15 cities · worst Ras Al Khaimah 151
- 59US AQIThailandMedian of 60 cities · worst Kanchanaburi 99
- 151US AQIMalaysiaMedian of 48 cities · worst Alor Gajah 197
- 156US AQISingaporeMedian of 1 cities · worst Singapore 156
- 67US AQIVietnamMedian of 11 cities · worst Bắc Ninh 101
Weather and health guides
From the blog
All articles
Data stories87 cities had dirtier air than Delhi this October. Most were in Indonesia and Malaysia
Data storiesAfter the monsoon, Maharashtra's air got worse four times as fast as Delhi's
GuidesHow to improve indoor air quality at home, and when to open the windows
NewsKalimantan haze: Central Kalimantan's air turns hazardous as smoke drifts over Jakarta
ExplainersWhat is ISPU? Indonesia's air quality index, and how it compares with the US AQI
NewsSoutheast Asia haze 2026: Singapore's PSI hits 192 as Malaysia shuts schools
Frequently asked questions
What is Good Air?
Good Air is a free weather and air quality app for iPhone and iPad, with Android on the way, and this website. It shows the live Air Quality Index from the nearest official monitoring station, health advice for the current level, forecasts and weather alerts, for 1,222 cities. Get the app.
Where does the air quality data come from?
From government monitoring networks: CPCB in India, the US EPA's AirNow, China's CNEMC, the UAE's NCM and EAD, Indonesia's KLH and BMKG, Thailand's PCD, Malaysia's DOE, Singapore's NEA and Vietnam's CEM, plus research stations shared through OpenAQ. Rankings never include modelled estimates.
How often is the AQI updated?
Most networks publish every hour, and our pages refresh every few minutes after they do. Each page shows when its reading was measured.
Which AQI scale does Good Air use?
The scale each country's government publishes: India's National AQI, China's AQI, and the US EPA AQI elsewhere. India and China pages also show the US AQI, which we use for world rankings. How the scales work.
Is Good Air free?
Yes. The app is free to download, with no account needed, and every page on this website is free to use.