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Total 2 results found. Search for [ Ban ROs ]

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PTI
May 29, 2019
TDS is made up of inorganic salts as well as small amounts of organic matter. As per a WHO study TDS levels below 300 mg per litre are considered to be excellent, while 900 mg per litre is said to be poor and above 1200 mg is unacceptable.


PTI
May 28, 2019



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