Agency, New Delhi.
Published by: Jeet Kumar
Updated Monday, 25 October 2021 05:28 AM IST
Rajiv Ranjan Mishra, Director General, National Mission for Clean Ganga (NMCG), said several projects being undertaken for the cleansing of the Ganges have begun to show results.
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Biochemical oxygen (BOD) bathing in 68 of the 97 monitoring sites in the Ganges is up to standards, Mishra said. Apart from this, the level of dissolved oxygen in the whole river is higher than the prescribed minimum level. In 2014, according to BOD standards, only 32 places had water quality for bathing.
Namami Ganga and NMCG were launched in 2015 at an estimated cost of about 20,000. Under this, 347 projects worth Rs 30,255 crore have so far been sanctioned for sewerage infrastructure, municipal solid waste, wharf development, aquatic biodiversity and public engagement.
As a result, none of the 351 most polluted rivers identified by the Central Pollution Control Board (CPCB) in India are part of the Ganges. Factors such as lockdown due to Kovid, travel restrictions, and better river flow due to insufficient rainfall were also included to improve Ganga water quality.
The higher the BOD, the lower the oxygen in the river
BOD actually refers to the oxygen consumption used by bacteria and other microorganisms present in the water. The higher the BOD, the faster the oxygen in the river decreases.
The water quality of the Ganges up to Haridwar is in Category A. The minimum level of dissolved oxygen (DO) in the Ganges is more than 5 mg / l. Water quality is assessed based on quality parameters i.e. DO (5mg / l), BOD (3mg / l) and fecal coliform (FC) (2500 mpn / 100 ml) and pH (6.5-8.5) for bathing. River water up to Haridwar in Uttarakhand meets all standards. Such river waters are classified as A category.