Civil Engineering - Water Supply Engineering - Discussion


The maximum permissible nitrites in public water supplies, is

[A]. Nil
[B]. 0.5 P.P.M.
[C]. 1.0. P.P.M.
[D]. 1.5 P.P.M.
[E]. 200 P.P.M.

Answer: Option A


No answer description available for this question.

Surya said: (Aug 6, 2015)  
For nitrites --nil.

Nitrate --45 ppm.

Ashwani Suthar said: (Sep 9, 2015)  
The partly oxidized organic matter present in the form of nitrites is very dangerous for human health. It should be nil for potable water.

P S Thanveer said: (Feb 13, 2016)  
Among all the forms of nitrogen present in water. Nitrites indicate partly decomposed condition thus its avoided completely.

Bhaskar Manna said: (May 5, 2017)  
The answer will be option C) 1 P.P.M.

Amit Naik said: (Jan 28, 2018)  
It's max means 0.5 ppm.

Bittu said: (Aug 11, 2018)  
Acc to WHO, Nitrate is 10 ppm.

Pushap said: (Nov 3, 2018)  
Permissible to 45 ppm.

Rixu said: (May 11, 2019)  
It is nitrites Not nitrates.

Jay said: (Aug 5, 2019)  
Nitrites are highly dangerous for human health.

It represents partial decomposition of organic matter and it should not be present in water at all.

Vijay Shankar said: (Mar 7, 2021)  
The World Health Organization (WHO) guideline of 50 ppm and the US maximum contaminant level (MCL) of 45 ppm for nitrate in drinking water are established for the protection of infants from methemoglobinemia. The WHO guideline for nitrite is 3 ppm and the MCL 1 ppm. The water must also be microbiologically safe.

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