Mr. Duck’s Air Quality
Air quality snapshots for cities, countries, and continents — refreshed daily from open data sources.
Note: readings can be missing or outdated for some places. When data is limited, we show what we have and avoid over-interpreting it.
Cities with usable recent data
3,142
Enough measurements to compute a city snapshot
Countries in dataset
132
Coverage depends on what sources report
Continents
7
Global coverage where data exists
Updated ≤24h
0.0%
Based on the newest timestamp we have per city
Global air quality snapshot (cities)
A simple snapshot based on the latest available city readings. It is not a forecast.
| Category | Cities | Share |
|---|---|---|
| Good | 1,831 | 58.3% |
| Moderate | 916 | 29.2% |
| Unhealthy for Sensitive Groups | 269 | 8.6% |
| Unhealthy | 114 | 3.6% |
| Very Unhealthy | 10 | 0.3% |
| Hazardous | 2 | 0.1% |
Most polluted cities (snapshot)
- City of Banja LukaHazardous • pm25 298.8 • le7d
- PljevljaHazardous • pm25 240.883 • le7d
- PortlandUnhealthy for Sensitive Groups • pm10 214 • le7d
- DushanbeVery Unhealthy • pm25 211 • le7d
- GostivarVery Unhealthy • pm25 199.6 • le7d
- KavadarciUnhealthy for Sensitive Groups • pm10 171.202 • le7d
- DejVery Unhealthy • pm25 154.615 • le7d
- El SaltoVery Unhealthy • pm25 154.252 • le7d
- DelhiVery Unhealthy • pm25 152 • le7d
- DimitrovgradVery Unhealthy • pm25 149.83 • le7d
Cleanest cities (snapshot)
- BarakaldoGood • pm25 0 • le7d
- BlufftonGood • pm25 0 • le7d
- Dawson CountyGood • pm25 0 • le7d
- DouglasGood • pm10 0 • le7d
- DourbesGood • pm25 0 • le7d
- GalileaGood • pm25 0 • le7d
- Gallatin CountyGood • pm25 0 • le7d
- HukouGood • pm25 0 • le7d
- JehonvilleGood • pm25 0 • le7d
- KaizuGood • pm25 0 • le7d
Browse
Start broad, then drill down to specific city snapshots.
Learn
About the data
Plain-language guide to pollutants, units, and timestamps.