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September 28, 2026

Global Air Quality Update - Week of September 28, 2026

Live data snapshot for September 28, 2026. 217 cities tracked. Global average AQI: 68.

This week's most polluted city is Riyadh, Saudi Arabia at AQI 946. The cleanest air right now is in Cali, Colombia at AQI 17.

Biggest changes this week

Worsening

Improving

Global average shifted from 72 to 68 (-4).

Top 10 most polluted cities right now

  1. Riyadh, Saudi Arabia - AQI 946 (PM2.5 99.4 μg/m³)
  2. Jakarta, Indonesia - AQI 189 (PM2.5 58.7 μg/m³)
  3. Bandung, Indonesia - AQI 187 (PM2.5 57.6 μg/m³)
  4. Xian, China - AQI 179 (PM2.5 51.2 μg/m³)
  5. Dubai, UAE - AQI 172 (PM2.5 95.9 μg/m³)
  6. Dhaka, Bangladesh - AQI 163 (PM2.5 43.9 μg/m³)
  7. Kuala Lumpur, Malaysia - AQI 161 (PM2.5 45.9 μg/m³)
  8. Faisalabad, Pakistan - AQI 155 (PM2.5 61 μg/m³)
  9. Beijing, China - AQI 151 (PM2.5 21.7 μg/m³)
  10. Lahore, Pakistan - AQI 151 (PM2.5 54.9 μg/m³)

Top 10 cleanest cities right now

  1. Cali, Colombia - AQI 17 (PM2.5 2.6 μg/m³)
  2. Philadelphia, United States - AQI 20 (PM2.5 2.2 μg/m³)
  3. Tallinn, Estonia - AQI 22 (PM2.5 3.1 μg/m³)
  4. Montreal, Canada - AQI 22 (PM2.5 2.4 μg/m³)
  5. Christchurch, New Zealand - AQI 22 (PM2.5 3.7 μg/m³)
  6. Helsinki, Finland - AQI 23 (PM2.5 1.9 μg/m³)
  7. Novosibirsk, Russia - AQI 23 (PM2.5 1.4 μg/m³)
  8. Wellington, New Zealand - AQI 23 (PM2.5 0.9 μg/m³)
  9. San Jose, Costa Rica - AQI 24 (PM2.5 8.1 μg/m³)
  10. Udon Thani, Thailand - AQI 25 (PM2.5 2.7 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 refreshed every 30 minutes by atmos.today. See methodology and attribution.