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Ta‘izz, Yemen

Yufrus · Air quality

Friday, Oct 30 · Asia/Aden

Yufrus air quality

US air quality index

116

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
7 µg/m³
PM2.5
31 µg/m³
PM10
177 µg/m³
Ozone
75 µg/m³
Nitrogen dioxide
0.3 µg/m³
Sulfur dioxide
1.3 µg/m³
Carbon monoxide
121.3 µg/m³
European AQI (separate scale)
6