Table 2.

Ground water and Municipal water (GW-2) characteristics.

Parameters	GW-1		GW-2		GW-3		GW-4
	Winter	Summer	Winter	Summer	Winter	Summer	Winter	Summer
pH	7.07	7.21	8.01	7.8	7.25	7.4	7.13	7.5
TDS (mg/L)	1810	1860	821	864	465	590	1190	1206
DO (mg/L)	4	0.8	4.5	3.7	5	3.4	3.5	2.8
COD (mg/L)	116	95	20	12	4	16	12	12
BOD (mg/L)	24	12	4	2.0	Nil	3.0	4	2.0
NH3 (mg/L)	0.1	<0.1	0.1	<0.1	0.1	<0.1	0.1	<0.1
F (mg/L)	0.5	0.9	0.8	0.8	0.8	0.9	0.9	0.8
Hg (mg/L)	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
As (mg/L)	<0.05	<0.05	<0.05	<0.05	<0.05	<0.05	<0.05	<0.05
Cd (mg/L)	<0.003	<0.003	<0.003	<0.003	<0.003	<0.003	<0.003	<0.003
Pb (mg/L)	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01
Ni (mg/L)	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01
Cu (mg/L)	<0.05	<0.05	<0.05	<0.05	<0.05	<0.05	<0.05	<0.05
Zn (mg/L)	<0.01	0.57	<0.01	0.32	<0.01	0.45	<0.01	0.32
Mn (mg/L)	<0.01	<0.1	<0.01	<0.1	<0.01	<0.1	<0.01	<0.1
Cr (mg/L)	<0.05	<0.05	<0.05	<0.05	<0.05	<0.05	<0.05	<0.05
Fish survival after 96 h	70%	75%	90%	90%	90%	90%	90%	90%
Parameters	GW-5		GW-6		IS: 10500-2012 Limits
	Winter	Summer	Winter	Summer	Desirable		Permissible
pH	7.06	7.30	7.25	7.35	6.5-8.5		No Relaxation
TDS (mg/L)	1465	410	1898	1620	500		2000
DO (mg/L)	3.5	3.1	3.2	2.6	NS		NS
COD (mg/L)	38	12	42	14	NS		NS
BOD (mg/L)	6	2.0	8	2.0	NS		NS
NH3 (mg/L)	0.1	<0.1	0.2	<0.1	NS		NS
F (mg/L)	0.9	0.8	0.8	0.9	1		1.5
Hg (mg/L)	<0.001	<0.001	<0.001	<0.001	0.001		No Relaxation
As (mg/L)	<0.05	<0.05	<0.05	<0.05	0.01		0.05
Cd (mg/L)	<0.003	<0.003	<0.003	<0.003	0.003		No Relaxation
Pb (mg/L)	<0.01	<0.01	<0.01	<0.01	0.01		No Relaxation
Ni (mg/L)	<0.01	<0.01	<0.01	<0.01	NS		NS
Cu (mg/L)	<0.05	<0.05	<0.05	<0.05	0.05		1.5
Zn (mg/L)	<0.01	0.53	<0.01	0.41	5		15
Mn (mg/L)	<0.01	<0.1	<0.01	<0.1	0.1		0.3
Cr (mg/L)	<0.05	<0.05	<0.05	<0.05	0.05		No Relaxation
Fish survival after 96 h	90%	90%	90%	90%	90%		90%