Global Air Quality Update - Week of July 27, 2026

Live data snapshot for July 27, 2026. 217 cities tracked. Global average AQI: 72.

This week's most polluted city is Riyadh, Saudi Arabia at AQI 1651. The cleanest air right now is in Quito, Ecuador at AQI 18.

Biggest changes this week

Worsening

• Riyadh, Saudi Arabia: 1027 → 1651 AQI (+624)
• Abu Dhabi, UAE: 130 → 152 AQI (+22)
• Beijing, China: 137 → 155 AQI (+18)
• Brasilia, Brazil: 20 → 30 AQI (+10)
• Faisalabad, Pakistan: 163 → 168 AQI (+5)

Improving

• Kuwait City, Kuwait: 728 → 660 AQI (-68)
• Chengdu, China: 209 → 143 AQI (-66)
• Delhi, India: 187 → 158 AQI (-29)
• Lahore, Pakistan: 186 → 160 AQI (-26)
• Jakarta, Indonesia: 179 → 158 AQI (-21)

Global average shifted from 74 to 72 (-2).

Top 10 most polluted cities right now

1. Riyadh, Saudi Arabia - AQI 1651 (PM2.5 207.7 μg/m³)
2. Kuwait City, Kuwait - AQI 660 (PM2.5 165.8 μg/m³)
3. Faisalabad, Pakistan - AQI 168 (PM2.5 50.9 μg/m³)
4. Santiago, Chile - AQI 164 (PM2.5 63.3 μg/m³)
5. Lahore, Pakistan - AQI 160 (PM2.5 48.9 μg/m³)
6. Doha, Qatar - AQI 160 (PM2.5 73.6 μg/m³)
7. Delhi, India - AQI 158 (PM2.5 54.2 μg/m³)
8. Jakarta, Indonesia - AQI 158 (PM2.5 33.8 μg/m³)
9. Beijing, China - AQI 155 (PM2.5 37 μg/m³)
10. Bandung, Indonesia - AQI 155 (PM2.5 32.9 μg/m³)

Top 10 cleanest cities right now

1. Quito, Ecuador - AQI 18 (PM2.5 3.8 μg/m³)
2. Stockholm, Sweden - AQI 19 (PM2.5 4.1 μg/m³)
3. Oslo, Norway - AQI 19 (PM2.5 2 μg/m³)
4. Hua Hin, Thailand - AQI 20 (PM2.5 4.3 μg/m³)
5. Pattaya, Thailand - AQI 23 (PM2.5 2.2 μg/m³)
6. London, United Kingdom - AQI 24 (PM2.5 4.9 μg/m³)
7. Auckland, New Zealand - AQI 24 (PM2.5 12.3 μg/m³)
8. Copenhagen, Denmark - AQI 24 (PM2.5 3.5 μg/m³)
9. Wellington, New Zealand - AQI 24 (PM2.5 8.2 μg/m³)
10. Amsterdam, Netherlands - AQI 26 (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 refreshed every 30 minutes by atmos.today. See methodology and attribution.