SmogRank / Countries / Laos / Vientiane Prefecture

Most polluted cities in Vientiane Prefecture, Laos

1 measured city, last 30 days; 1 above the WHO 24-hour guideline. Worst: Vientiane at 18.2 µg/m³, #187 in the world.

  1. 1Vientianelow-cost sensors 18.2
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

Updated 2026-10-01 20:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.