SmogRank / World / Europe / Italy / Aosta Valley

Most polluted cities in Aosta Valley, Italy

1 measured city, last 30 days; 0 above the WHO 24-hour guideline. Worst: Aosta at 10.8 µg/m³, #634 in the world.

The 20 monitors run by ARPA Lazio in Italy haven't reported for more than two days. Cities that rely on them are missing from the 24-hour board and may drop from the longer ones; they return when the data does.

Piedmont: 3 measured citiesAosta Valley: 1 measured city#1 Aosta: 10.8 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
  1. 1Aosta 54▼225
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

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SmogRank, most polluted cities in Aosta Valley, Italy, PM2.5, last 30 days to 2 Oct 2026, 08:00 UTC, smogrank.com/it/region/aosta-valley?w=30d.

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Updated 2026-10-02 08:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.