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May 4, 2026

Global Air Quality Update - Week of May 4, 2026

Live data snapshot for May 4, 2026. 217 cities tracked. Global average AQI: 67.

This week's most polluted city is Jeddah, Saudi Arabia at AQI 1022. The cleanest air right now is in Quito, Ecuador at AQI 11.

Biggest changes this week

Worsening

Improving

Global average shifted from 81 to 67 (-14).

Top 10 most polluted cities right now

  1. Jeddah, Saudi Arabia - AQI 1022 (PM2.5 140.2 μg/m³)
  2. Riyadh, Saudi Arabia - AQI 600 (PM2.5 30.4 μg/m³)
  3. Delhi, India - AQI 496 (PM2.5 66.4 μg/m³)
  4. Kanpur, India - AQI 190 (PM2.5 44.5 μg/m³)
  5. Jaipur, India - AQI 178 (PM2.5 32.9 μg/m³)
  6. Jakarta, Indonesia - AQI 159 (PM2.5 67.3 μg/m³)
  7. Bandung, Indonesia - AQI 153 (PM2.5 58.2 μg/m³)
  8. Shanghai, China - AQI 151 (PM2.5 59.6 μg/m³)
  9. Santiago, Chile - AQI 145 (PM2.5 65.2 μg/m³)
  10. Phnom Penh, Cambodia - AQI 143 (PM2.5 24.8 μg/m³)

Top 10 cleanest cities right now

  1. Quito, Ecuador - AQI 11 (PM2.5 1.6 μg/m³)
  2. Cali, Colombia - AQI 14 (PM2.5 2.1 μg/m³)
  3. La Paz, Bolivia - AQI 16 (PM2.5 4.1 μg/m³)
  4. Manaus, Brazil - AQI 16 (PM2.5 2 μg/m³)
  5. Montevideo, Uruguay - AQI 17 (PM2.5 2.5 μg/m³)
  6. Madrid, Spain - AQI 19 (PM2.5 4.1 μg/m³)
  7. Buenos Aires, Argentina - AQI 21 (PM2.5 2.5 μg/m³)
  8. Helsinki, Finland - AQI 21 (PM2.5 3.1 μg/m³)
  9. Dar es Salaam, Tanzania - AQI 23 (PM2.5 7 μg/m³)
  10. Fortaleza, Brazil - AQI 23 (PM2.5 3.5 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.