Global Air Quality Update - Week of April 28, 2026

Live data snapshot for April 28, 2026. 217 cities tracked. Global average AQI: 81.

This week's most polluted city is Jeddah, Saudi Arabia at AQI 1886. The cleanest air right now is in Adelaide, Australia at AQI 11.

This is the first weekly snapshot. Future updates will include week-over-week changes.

Top 10 most polluted cities right now

1. Jeddah, Saudi Arabia - AQI 1886 (PM2.5 335.3 μg/m³)
2. Riyadh, Saudi Arabia - AQI 1303 (PM2.5 101.7 μg/m³)
3. Delhi, India - AQI 612 (PM2.5 42.6 μg/m³)
4. Kanpur, India - AQI 198 (PM2.5 74.5 μg/m³)
5. Jakarta, Indonesia - AQI 167 (PM2.5 128.5 μg/m³)
6. Hyderabad, India - AQI 158 (PM2.5 47.4 μg/m³)
7. Bandung, Indonesia - AQI 157 (PM2.5 113.2 μg/m³)
8. Lucknow, India - AQI 151 (PM2.5 61 μg/m³)
9. Bengaluru, India - AQI 149 (PM2.5 28.3 μg/m³)
10. Kuwait City, Kuwait - AQI 148 (PM2.5 64.7 μg/m³)

Top 10 cleanest cities right now

1. Adelaide, Australia - AQI 11 (PM2.5 4.2 μg/m³)
2. Montevideo, Uruguay - AQI 17 (PM2.5 2.7 μg/m³)
3. Christchurch, New Zealand - AQI 19 (PM2.5 7 μg/m³)
4. Asuncion, Paraguay - AQI 20 (PM2.5 5.8 μg/m³)
5. Buenos Aires, Argentina - AQI 21 (PM2.5 4.3 μg/m³)
6. La Paz, Bolivia - AQI 21 (PM2.5 2.4 μg/m³)
7. Cali, Colombia - AQI 24 (PM2.5 4.9 μg/m³)
8. Brisbane, Australia - AQI 24 (PM2.5 3.4 μg/m³)
9. Perth, Australia - AQI 24 (PM2.5 10.4 μg/m³)
10. Port Moresby, Papua New Guinea - AQI 25 (PM2.5 4.7 μg/m³)

What is AQI?

AQI (Air Quality Index) is a 0-500 scale used by the US EPA. Below 50 is good, above 150 unhealthy, above 300 hazardous. Most damage comes from PM2.5 - fine particles that enter the bloodstream. Learn more: PM2.5 explained.

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Data: live readings via OpenAQ + Open-Meteo. atmos.today refreshes every 30 minutes. Sources: methodology.