Questions and Answers
What is the annual concentration limit for Sulphur Dioxide (SO2) in residential areas according to NAAQS?
Which method is used for measuring Nitrogen Dioxide (NO2) according to the NAAQS?
What is the 24-hour concentration limit for Particulate Matter in ecologically sensitive areas?
According to NAAQS, what is the annual concentration limit for Nitrogen Dioxide (NO2) in rural and other areas?
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What is the designated measurement method for Sulphur Dioxide (SO2) according to the NAAQS?
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What is the 24-hour concentration limit for Sulphur Dioxide (SO2) in industrial areas according to NAAQS?
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What is the annual concentration limit for Particulate Matter in ecologically sensitive areas?
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In which area category is the 24-hour limit for Particulate Matter set at 80 µg/m3?
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Study Notes
National Ambient Air Quality Standards (NAAQS)
- Revised NAAQS were notified on 18th November 2009, establishing concentration limits for pollutants in ambient air.
- Standards apply to different areas categorized as Industrial, Residential, Sensitive, Rural, and Ecological.
Sulphur Dioxide (SO2)
-
Annual Average:
- Industrial areas: 50 µg/m³
- Residential and Sensitive Areas: 20 µg/m³
-
24 Hour Average:
- Applicable for all area types: 80 µg/m³
-
Measurement Methods:
- Improved West and Gaeke method
- Ultraviolet Fluorescence
Nitrogen Dioxide (NO2)
-
Annual Average:
- Industrial areas: 40 µg/m³
- Residential and Sensitive Areas: 30 µg/m³
-
24 Hour Average:
- Applicable for all area types: 80 µg/m³
-
Measurement Methods:
- Modified Jacob & Hochheiser method
- Chemiluminescence
Particulate Matter
-
Annual Average:
- Unified limit of 60 µg/m³ for all area types
-
Measurement Method:
- Gravimetric method
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Description
Test your knowledge on the National Ambient Air Quality Standards (NAAQS) as revised in 2009. This quiz covers pollutant concentrations and measurement methods relevant to different areas such as industrial, residential, and ecologically sensitive regions. Perfect for environmental science students and professionals!
