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Hunan, China

Guanyuan · Air quality

Friday, Nov 6 · Asia/Shanghai

Guanyuan air quality

US air quality index

112

Unhealthy for sensitive groups

US EPA scale

  1. Good0–50
  2. Moderate51–100
  3. Unhealthy for sensitive groups101–150Current category
  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
40 µg/m³
PM2.5
44 µg/m³
PM10
49 µg/m³
Ozone
42 µg/m³
Nitrogen dioxide
13 µg/m³
Sulfur dioxide
16.3 µg/m³
Carbon monoxide
580.3 µg/m³
European AQI (separate scale)
4