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Al Hudaydah, Yemen

Al Khawkhah · Air quality

Saturday, Nov 7 · Asia/Aden

Al Khawkhah air quality

US air quality index

59

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
4 µg/m³
PM2.5
17 µg/m³
PM10
50 µg/m³
Ozone
49 µg/m³
Nitrogen dioxide
2 µg/m³
Sulfur dioxide
1 µg/m³
Carbon monoxide
130 µg/m³
European AQI (separate scale)
3