S. No
Parameter
Max. permissible limit for drinking water
Desirable limit for drinking water
No.ofwater samples analyzed
No. of Samples above
Range
Mean Value
StdDeviati-on
*DL
*PL
Min
Max
1.
pH
No relaxation
6.5-8.5
20
Nil
Nil
7
8
7.55
0.34
2.
EC
0-2000 µS/cm
750 µS/cm
20
2
Nil
205
849
441.51
188.87
3.
TDS
2000 mg/l
500 mg/l
20
2
Nil
134
565
291.22
125.31
4.
TH
600mg/l
300mg/l
20
Nil
Nil
90
188
135
30.29
5.
Cl-
1000 mg/l
250mg/l
20
Nil
Nil
2.13
4.97
3.51
0.99
6.
Ca
2+
200 mg/l
75 mg/l
20
Nil
Nil
11.77
45.11
32.15
8.00
7.
Mg
2+
100 mg/l
30 mg/l
20
Nil
Nil
2.92
26.35
14.04
8.22
8.
NO
3
2-
No relaxation
45mg/l
20
Nil
Nil
0
1.00
0.16
0.26
9.
Na
+
20
-
-
0.1
31.9
7.54
8.35
10.
K
+
20
-
-
0.8
3.2
1.6
0.62
11.
SO
4
2-
400 mg/l
200 mg/l
20
Nil
Nil
9.39
13.70
10.69
1.53
12.
PO
4
2-
0.1mg/l
-
20
Nil
Nil
0
0.47
0.06
0.10
*DL- Desirable Limit; *PL- Permissible Limit
Table 1:
Distribution of groundwater samples showing various parameters against maximum permissible and desirable limits.
