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Chaharmahal and Bakhtiari, Iran

Farrokh Shahr · Air quality

Thursday, Nov 12 · Asia/Tehran

Farrokh Shahr air quality

US air quality index

45

Good

US EPA scale

  1. Good0–50Current category
  2. Moderate51–100
  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
6 µg/m³
PM2.5
7 µg/m³
PM10
9 µg/m³
Ozone
47 µg/m³
Nitrogen dioxide
8.3 µg/m³
Sulfur dioxide
2 µg/m³
Carbon monoxide
195.3 µg/m³
European AQI (separate scale)
2