Question
Download Solution PDFWhat is the correct sequence of prescribed limits in residential areas of 24 hourly averages following pollutants by the Central Pollution Control Board of India?
(A) PM 2.5
(B) PM 10
(C) SOx
(D) Pb
Choose the correct answer from the options given below :
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe Air (Prevention and Control of Pollution) Act 1981was enacted by the Central Government with the objective of arresting the deterioration of air quality.
Key Points
Ambient Air Quality Standards in India
The Air (Prevention and Control of Pollution) Act 1981 describes the main functions of the Central Pollution Control Board (CPCB) as follows:
- To advise the Central Government on any matter concerning the improvement of the quality of the air and the prevention, control, and abatement of air pollution.
- To plan and cause to be executed a nation-wide program for the prevention, control, and abatement of air pollution.
- To provide technical assistance and guidance to the State Pollution Control Board.
- To carry out and sponsor investigations and research related to prevention, control, and abatement of air pollution.
- To collect, compile and publish technical and statistical data related to air pollution; and
- To lay down and annul standards for the quality of air
The list is in the order of:
|
Pollutant |
Time Weighted Average |
Concentration in Ambient Air |
|
|
Industrial, Residential, Rural, and Other Area |
Methods of Measurement |
||
|
SO2, μg/m3 |
Annual* |
50 |
|
|
24 hours** |
80 |
||
|
PM10, μg/m3 |
Annual* |
60 |
|
|
24 hours** |
100 |
||
|
PM2.5, μg/m3 |
Annual* |
40 |
|
|
24 hours** |
60 |
||
|
Lead (Pb), μg/m3 |
Annual* |
0.50 |
|
|
24 hours** |
1 |
||
Hence, the correct answer is PM10 > SOx > PM2,5 > Pb
Last updated on Jul 4, 2025
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