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Henan, China

Xiantai · Air quality

Wednesday, Nov 4 · Asia/Shanghai

Xiantai air quality

US air quality index

109

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
44 µg/m³
PM2.5
57 µg/m³
PM10
70 µg/m³
Ozone
14.3 µg/m³
Nitrogen dioxide
28.7 µg/m³
Sulfur dioxide
6.3 µg/m³
Carbon monoxide
481.3 µg/m³
European AQI (separate scale)
4