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Shaanxi, China

Sangzhen · Air quality

Saturday, Oct 31 · Asia/Shanghai

Sangzhen air quality

US air quality index

137

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
35 µg/m³
PM2.5
47 µg/m³
PM10
71 µg/m³
Ozone
39 µg/m³
Nitrogen dioxide
32 µg/m³
Sulfur dioxide
13 µg/m³
Carbon monoxide
495 µg/m³
European AQI (separate scale)
5