Which of the following statement is correct regarding Air quality index?

I. The Air Quality index is also referred as the Pollutant Standard Index

II. Air quality index is a number used by the air quality monitoring agencies to inform the public about the quality of air in their vicinity 

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HPCL Engineer Civil 23 Dec 2023 Official Paper
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  1. Only II
  2. Both I and II
  3. Neither I nor II
  4. Only I

Answer (Detailed Solution Below)

Option 2 : Both I and II
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Detailed Solution

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Concept:

The Air Quality Index (AQI) is a tool used by environmental agencies to communicate how polluted the air currently is or how polluted it is forecast to become. It converts complex air quality data into a single number and color code, making it easy for the public to understand.

Statement I: The Air Quality Index is also referred to as the Pollutant Standard Index.

  • This statement is correct. The AQI is sometimes referred to as the Pollutant Standard Index (PSI), especially in older literature and contexts.

Statement II: The Air Quality Index is a number used by the air quality monitoring agencies to inform the public about the quality of air in their vicinity.

  • This statement is correct. The AQI provides a clear indication of air quality to the public, helping people understand when air pollution levels are high and what precautions to take.
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