Global Air Quality Update - Week of October 12, 2026

Live data snapshot for October 12, 2026. 217 cities tracked. Global average AQI: 75.

This week's most polluted city is Riyadh, Saudi Arabia at AQI 1223. The cleanest air right now is in La Paz, Bolivia at AQI 11.

Biggest changes this week

Worsening

• Riyadh, Saudi Arabia: 954 → 1223 AQI (+269)
• Dhaka, Bangladesh: 176 → 203 AQI (+27)
• Bandung, Indonesia: 163 → 187 AQI (+24)
• Kuala Lumpur, Malaysia: 160 → 183 AQI (+23)
• Jakarta, Indonesia: 171 → 189 AQI (+18)

Improving

• Helsinki, Finland: 29 → 19 AQI (-10)
• La Paz, Bolivia: 20 → 11 AQI (-9)
• Tallinn, Estonia: 26 → 19 AQI (-7)
• Oslo, Norway: 23 → 19 AQI (-4)

Global average shifted from 71 to 75 (+4).

Top 10 most polluted cities right now

1. Riyadh, Saudi Arabia - AQI 1223 (PM2.5 233.3 μg/m³)
2. Beijing, China - AQI 228 (PM2.5 152.3 μg/m³)
3. Dhaka, Bangladesh - AQI 203 (PM2.5 43.5 μg/m³)
4. Mumbai, India - AQI 198 (PM2.5 68.5 μg/m³)
5. Jakarta, Indonesia - AQI 189 (PM2.5 56.6 μg/m³)
6. Bandung, Indonesia - AQI 187 (PM2.5 50.6 μg/m³)
7. Kuala Lumpur, Malaysia - AQI 183 (PM2.5 52.5 μg/m³)
8. Kolkata, India - AQI 178 (PM2.5 64.7 μg/m³)
9. Bangkok, Thailand - AQI 177 (PM2.5 38.6 μg/m³)
10. Manaus, Brazil - AQI 173 (PM2.5 141.1 μg/m³)

Top 10 cleanest cities right now

1. La Paz, Bolivia - AQI 11 (PM2.5 4.4 μg/m³)
2. Stockholm, Sweden - AQI 15 (PM2.5 1.7 μg/m³)
3. Cali, Colombia - AQI 16 (PM2.5 1.4 μg/m³)
4. Oslo, Norway - AQI 19 (PM2.5 3.2 μg/m³)
5. Copenhagen, Denmark - AQI 19 (PM2.5 2 μg/m³)
6. Helsinki, Finland - AQI 19 (PM2.5 1.9 μg/m³)
7. Tallinn, Estonia - AQI 19 (PM2.5 3.5 μg/m³)
8. Calgary, Canada - AQI 19 (PM2.5 4.1 μg/m³)
9. San Jose, Costa Rica - AQI 21 (PM2.5 5 μg/m³)
10. Melbourne, Australia - AQI 24 (PM2.5 7.2 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.