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Option 1 : 301-500

Air Quality Index is a measure to determine how polluted the air currently is or how polluted it is forecasted to become in the near future. The index of air quality is as follows:

AQI Index Value

Indication

0 to 50

Good

51 to 100

Moderate

101 to 150

Unhealthy for Sensitive Groups

151 to 200

Unhealthy

201 to 300

Very Unhealthy

301 to 500

Hazardous

More than 500

Emergency

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