Parameter (n = 200)

Water type

Min.

Max.

SD

Mean ± SE

CV (%)

P value for Z test

Standard

[24]

Standard [23]

pH

Raw

5.13

7.47

0.64

6.17 ± 0.45

10.29

0.02*

6.5 - 8.5

6.0 - 8.0

Tap

5.58

7.52

0.58

6.03 ± 0.04

9.57

5.5 - 8.5

6.5 - 8.5

EC

(µS/cm)

Raw

46.00

216.00

51.52

108.94 ± 3.64

47.29

0.00*

<2500

<1500

Tap

34.00

103.00

11.85

74.89 ± 0.84

15.83

<1500

0 - 300

AC

(Pt/Co)

Raw

0.00

247.00

68.01

37.42 ± 4.81

181.74

0.00*

<15

<1500

Tap

0.00

14.00

2.88

7.94 ± 0.20

36.33

<15

<300

Turbidity

(NTUs)

Raw

0.30

49.76

11.47

6.64 ± 0.81

172.69

0.00*

<10

<15

Tap

0.27

3.95

0.79

1.68 ± 0.06

47.25

<5.0

<5.0

Total Hardness

(mg/L)

Raw

14.00

88.00

25.32

36.05 ± 1.79

70.25

0.36

<150

<1500

Tap

20.00

65.00

14.08

34.19 ± 00

41.19

<100

<100

Total Iron

(mg/L)

Raw

0.00

0.39

0.12

0.0924 ± 0.008

124.22

0.84

<1

<0.3

Tap

0.00

0.23

0.05

0.0907 ± 0.003

53.54

<0.2

<0.3

Faecal Coliforms (CFU/100 ml)

Raw

0.00

65.00

13.30

7.07 ± 0.94

188.26

0.00*

≤3

≤3

Tap

0.00

1.00

0.22

0.05 ± 0.02

436.98

0

0