The groundwater in most components of Delhi is brackish in nature and the nitrate focus is excessive within the northeastern components of the capital, the Central Floor Water Board (CGWB) has stated in a report.
“Chemical evaluation of groundwater samples collected in Could 2021 confirmed that nitrate content material in groundwater is throughout the permissible restrict of 45 micrograms per litre in many of the state. Nonetheless, focus within the north-eastern components of Delhi is excessive,” the CGWB’s groundwater 12 months ebook 2021-22 stated.
Besides a number of places within the northern and western components of town, all areas have a fluoride focus throughout the permissible restrict of 1.5 micrograms per litre, it stated.
The evaluation of groundwater samples collected from the nationwide hydrograph stations distributed all through Delhi confirmed that Jagatpur in north Delhi has the very best focus of manganese (2.293 milligrams per litre). Rohini Sector 11, Nangli, Rajapura, Bhalswa Lake and Burari logged excessive iron focus (greater than 1 milligrams per litre). The focus of uranium was past the permissible restrict (30 components per billion) at Kanjhawala, Jaunti and Nizampur, it stated.
The jap components of Delhi, particularly the areas across the Yamuna floodplains and the Delhi Quartzite Ridge zones, have {an electrical} conductivity (EC) throughout the permissible vary of 0 to 2,250 microsiemens per centimetre, the CGWB report stated.
“The remainder of the capital, barring some pockets of southwest, northwest and west districts, has EC worth of greater than 3,000 microsiemens per centimetre. It is usually noticed that water from deeper aquifers have better EC worth than the water from shallow aquifers. The EC worth will increase with depth,” it stated.
Salinity, the measure of the quantity of dissolved salts in water, is instantly proportional to the EC.
Normally, contemporary water has an EC of lower than 1,500 microsiemens per centimetre, brackish water between 1,500 and 15,000 microsiemens per centimetre and saline water has an EC of greater than 15,000 microsiemens per centimetre.
The chloride content material within the groundwater is usually under 250 micrograms per litre besides in circumstances the place inland salinity is prevalent.
In response to the Bureau of Indian Requirements (BIS), the fascinating restrict of chloride in ingesting water is 250 micrograms per litre. Nonetheless, it may be prolonged to 1,000 micrograms per litre in circumstances the place no different supply of water with the specified focus is on the market.
“Chloride focus in groundwater of Delhi is expounded with the EC content material. It’s noticed that in areas having EC values inside permissible limits (2,250 microsiemens per centimetre to three,000 microsiemens per centimetre), the chloride content material additionally lies throughout the permissible restrict of 250 micrograms per litre,” the report stated .
In areas having a excessive EC of greater than 3,000 microsiemens per centimetre, the chloride worth can be excessive — greater than 3,000 micrograms per litre.
A few of these areas embrace Sanjay Gandhi Transport Nagar (3,800), the Bawana water remedy plant (4,697) and Pusa (3,871).
(This story is printed as a part of the auto-generated syndicate wire feed. No modifying has been performed within the headline or the physique by ABP Stay.)
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