[Table/Fig-2]:

Maximum permissible limits as per Bureau of Indian Standards [7,8].

S. No	Parameter	IS-10500:2012	IS-14543:2004
1	Colur Hazen Units	5	2
2	Odour	unobjectionable	unobjectionable
3	Turbidity	5	2
4	pH	6.5-8.5	6.5-8.5
5	Total Dissolved Solids, mg/l	500	500
6	Total hardness as caco3, mg/l	300	-
7	Alkalinity mg/l	200	200
8	Calcium as Ca, mg/l	75	75
9	Magnesium as Mg, mg/l	30	30
10	Chloride as Cl, mg/l	250	200
11	Nitrate	45	45
12	Sulphate as So4, mg/l	200	200
13	Fluoride, mg/l	1	1
14	Sodium as Na, mg/l	-	200
15	Cadmium as Cd, mg/l	0.01	0.01
16	Chromium as Cr6, mg/l	0.05	0.05
17	Copper as Cu, mg/l	0.05	0.05
18	Iron as Fe, mg/l	0.3	0.1
19	Manganese as Mn, mg/l	0.1	0.1
20	Nickel as Ni, mg/l	-	0.02
21	Lead as Pb, mg/l	0.05	0.01
22	Zinc as Zn, mg/l	5	5