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Delhi, India

Najafgarh · Air quality

Saturday, Oct 31 · Asia/Kolkata

Najafgarh air quality

US air quality index

126

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
20 µg/m³
PM2.5
40 µg/m³
PM10
178 µg/m³
Ozone
91.3 µg/m³
Nitrogen dioxide
14 µg/m³
Sulfur dioxide
6.7 µg/m³
Carbon monoxide
317 µg/m³
European AQI (separate scale)
4