Civil Engineering - Water Supply Engineering - Discussion

2. 

The prescribed hardness limit of potable water ranges between

[A]. 50 to 75 P.P.M.
[B]. 75 to 115 P.P.M.
[C]. 100 to 150 P.P.M.
[D]. 150 to 200 P.P.M.
[E]. none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Gubendhiran said: (Dec 31, 2017)  
As per WHO hardness.

Less than 60ppm is soft,
60 to 120 ppm moderately soft,
120 to 180 ppm hard,
Greater than 180 very hard,
As per IS 10500,
Limited up to 300ppm,
Maximum limit of 600ppm.

Aamir said: (Jan 2, 2018)  
It should be 200 to 600ppm.

Mathi said: (Aug 20, 2018)  
Prescribed limit should be 200 to 300 ppm.

Max limit upto 600ppm.

Kalloljit said: (Oct 24, 2020)  
200 to 600 ppm.

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