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Piedmont, Italy

Vigliano Biellese · Air quality

Sunday, Nov 8 · Europe/Rome

Vigliano Biellese air quality

US air quality index

89

Moderate

US EPA scale

  1. Good0–50
  2. Moderate51–100Current category
  3. Unhealthy for sensitive groups101–150
  4. Unhealthy151–200
  5. Very unhealthy201–300
  6. Hazardous301–500+

A higher US AQI indicates more air pollution and greater health concern. Categories and pollutant concentration units are different measures.

Understand the EPA scale

All pollutants

PM1
25 µg/m³
PM2.5
27 µg/m³
PM10
27 µg/m³
Ozone
34.7 µg/m³
Nitrogen dioxide
10.7 µg/m³
Sulfur dioxide
1 µg/m³
Carbon monoxide
328.7 µg/m³
European AQI (separate scale)
4