SSC JE Civil Engineering 23-Sep-2019 Shift 1 Solved Paper

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Question : 174 of 200

Marks: +1, -0

According to WHO, what is the permissible chloride content in drinking water?

0.001 mg/l
1 mg/l
200 mg/l
350 mg/l

Solution:

Drinking According to WHO, Water Quality Parameters and BIS Standards for Various Chemical and Biological Constituents

S. No	Parameters	Drinking Water IS 10500 : 2012
S. No	Parameters	Permissible Limit	Maximum Limit
1.	Odor	Agreeable	Agreeable
2.	Taste	Agreeable	Agreeable
3.	pH	6.5 to 8.5	No relaxation
4.	TDS (mg/l)	500	2000
5.	Hardness (as CaCO $_3$ ) (mg/l)	200	600
6.	Alkalinity (as CaCO $_3$ ) (mg/l)	200	600
7.	Nitrate (mg/l)	45	No relaxation
8.	Sulfate (mg/l)	200	400
9.	Fluoride (mg/l)	1	1.5
10.	Chloride (mg/l)	250	1000
11.	Turbidity (NTU)	5	10
12.	Arsenic (mg/l)	0.01	0.05
13.	Copper (mg/l)	0.05	1.5
14.	Cadmium (mg/l)	0.003	No relaxation
15.	Chromium (mg/l)	0.05	No relaxation
16.	Lead (mg/l)	0.01	No relaxation
17.	Iron (mg/l)	0.3	No relaxation
18.	Zinc (mg/l)	5	15
19.	Fecal Coliform (cfu)	0	0
20.	E. Coli (cfu)	0	0

So, Drinking water standards require chloride level not exceed to 250 mg/l. Hence, option (c) is correct.

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