Which one of the following related to domestic potable water quality i

1.	Which one of the following related to domestic potable water quality is correct?
A.	Turbidity (on Silica scale) is 15-20 ppm or mg/lit.
B.	Colour (on Cobalt scale) is 15-25 ppm or mg/lit.
C.	Hardness (expressed as Ca CO3 equivalent) is 75-115 ppm or mg/lit
D.	BOD is 20 ppm or mg/lit
Answer» D. BOD is 20 ppm or mg/lit

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Which one of the following related to domestic potable water quality is correct?

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