Most polluted cities in Saudi Arabia, September 2026

No city in Saudi Arabia had measurements on 70% of the days, so September 2026 has no board for Saudi Arabia.

Good0–9.0

Moderate9.1–35.4

Sensitive groups35.5–55.4

Unhealthy55.5–125.4

Very unhealthy125.5–225.4

Hazardous225.5+