‘Isotopic study of dust particles undertaken to understand their impact on environment'
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In an exclusive interview by B K Mishra, BSPCB chairman Devendra Kumar Shukla has said the board has recently launched an isotopic study of dust particles in collaboration with National Institute of Oceanography, Goa, for identifying their source. Excerpts:
Bihar is ranked among one of the most polluted regions in the world. Why?
Some pockets of Bihar are certainly considered hotspots of air pollution mainly due to the large concentration of dust particles in atmosphere, but due to the recent initiatives of the BSPCB, the position has improved considerably.
Recently released World Air Quality Report, 2025, by Swiss firm IQAir has shown signs of improvement in several towns. Notably, Patna's position has improved significantly, dropping from 20th place in 2023 to 37th this year.
What initiatives have been taken by the board to combat air pollution?
Most recently, the board, in collaboration with National Institute of Oceanography (NIO), has undertaken an isotopic study of dust particles in the air to understand their sources, transport and impact on the environment.
The NIO has already started collecting samples of dust particles from Patna region in the first phase. After collecting samples from different parts of the state, the work will focus on using isotopic ratios, particularly Sr and Nd isotopes, to trace the origins of the dust particles, especially those transported from river Ganga.
Q. You are also making some studies in collaboration with the IITs?
A. Earlier, last year, the board started the study of dust particles in three most polluted cities of the state, namely, Patna, Muzaffarpur and Gaya, in collaboration with the IITs.
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The study will identify the "seasonal mass concentration level of PM2.5 and PM10 in ambient air" of the extended urban areas of the thee cities. PM 2.5 and PM 10 are minute particles present in the air, and exposure to these is harmful to health.
Real-time source apportionment studies help identify factors, such as vehicles, dust, biomass burning, and emissions from industries, responsible for an increase in air pollution in an area.
The study on dust particles of Patna region is likely to be completed this year.
What about water pollution in the state?
Jal-Jeevan-Hariyali scheme of the state has not only provided the people with drinking water supply but also enhanced the rate of groundwater recharge. About 1.85 lakh hectare area has benefited under eco-restoration scheme with focus on watershed development. Further, more than 3,500 ahar pynes (a traditional water management and irrigation system) will be restored under the fourth agricultural road map of the state.
All these will result in the total groundwater reserve of 34.15 BCM, of which 30.95 BCM can be extracted. At present, only 14.1 BCM of groundwater is being extracted. Hence, there is no problem of groundwater pollution in 473 blocks of the state.
Do you think groundwater is being misused in urban areas?
As many areas of the state are water-surplus, people are in habit of misutilising this resource. But, its overexploitation can be checked by introducing water meter in the supply system. People will try to save water, if they have to pay for it.
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