Question:
Pollutant standards index (PSI) value between 101–199 denotes the air quality as ........
Pollutant standards index (PSI) value between 101–199 denotes the air quality as ........
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Remember: PSI or AQI values between 101 and 199 reflect air that may cause adverse health effects, especially for sensitive groups.
Updated On: Jun 17, 2025
- good
- moderate
- unhealthy
- hazardous
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The Correct Option is C
Solution and Explanation
The Pollutant Standards Index (PSI) or Air Quality Index (AQI) categorizes air quality levels based on pollutant concentrations. According to common standards:
- 0–50: Good
- 51–100: Moderate
- 101–199: Unhealthy
- 200–299: Very unhealthy
- 300 and above: Hazardous
Hence, a PSI value in the range of 101–199 indicates unhealthy air quality.
- 101–199: Unhealthy
- 200–299: Very unhealthy
- 300 and above: Hazardous
Hence, a PSI value in the range of 101–199 indicates unhealthy air quality.
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