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Ta‘izz, Yemen

Al Nashmah · Air quality

Tuesday, Nov 3 · Asia/Aden

Al Nashmah air quality

US air quality index

87

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
7 µg/m³
PM2.5
32 µg/m³
PM10
170 µg/m³
Ozone
85 µg/m³
Nitrogen dioxide
0.3 µg/m³
Sulfur dioxide
2 µg/m³
Carbon monoxide
146.7 µg/m³
European AQI (separate scale)
5