S/N

Parameter

Unit

Range

Current Study

Mean ± S.E

Drinking Water Quality (NIS, 2007)

(MPL)

Water Quality for Fish/Aquatic life

(Meade, 1989)

1

Water-Temperature

˚C

24.0 - 33.5

28.3 ± 0.2

Ambient

-

2

Apparent-Colour

Pt-Co

181.1 - 1826.3

529.4 ± 42.2

15 TCU

-

3

True-Colour

Pt-Co

37.6 - 643.5

165.2 ± 11.6

15 TCU

-

4

Turbidity

NTU

7.6 - 183.3

40.6 ± 4.0

5

-

5

Total Suspended Solids (TSS)

mgL⁻¹

40 - 550

151 ± 12.8

ND

<80

6

Total Solids (TS)

mgL⁻¹

90 - 590

207 ± 13.1

ND

-

7

* pH

0 - 14

6.00 - 6.85

6.38 ± 0.09

6.5 - 8.5

6.5 - 8.0

8

Conductivity

µScm⁻¹

58 - 130

82 ± 2.2

1000

-

9

Total Dissolved Solids (TDS)

mgL⁻¹

40 - 90

54 ± 1.5

500

<400

10

* Total-Alkalinity

mgCaCO₃L⁻¹

8.0 - 28.0

22.0 ± 0.5

ND

10 - 400

11

* Total-Hardness

mgCaCO₃L⁻¹

0.93 - 23.31

11.51 ± 0.52

150

10 - 400

12

Total-Acidity

mgCaCO₃L⁻¹

4.0 - 30.0

13 ± 0.7

ND

-

13

Calcium ion (Ca²⁺)

mgL⁻¹

0.19 - 7.57

3.94 ± 0.17

ND

4 - 160

15

Magnesium ion (Mg²⁺)

mgL⁻¹

0.11 - 1.52

0.40 ± 0.04

0.2

<15

16

Sodium ion (Na⁺)

mgL⁻¹

5.09 - 9.34

6.24 ± 0.09

200

75

17

Potassium ion (K⁺)

mgL⁻¹

1.42 - 5.17

2.46 ± 0.11

ND

<5

18

Bicarbonate ion ( ${\text{HCO}}_3^{-1}$ )

mgL⁻¹

9.6 - 33.6

26.4 ± 0.6

ND

-

19

Chloride ion (Cl⁻¹)

mgL⁻¹

1.14 - 6.94

4.31 ± 0.13

250

-

20

Sulphate ion ( ${\text{SO}}_4^{2-}$ )

mgL⁻¹

1.91 - 9.92

5.14 ± 0.41

100

<50

21

* Dissolved Oxygen (DO)

mgL⁻¹

0.0 - 8.0

4.0 ± 0.2

ND

5

22

Dissolved Oxygen Saturation

%

0.0 - 105.5

51.0 ± 2.8

ND

-

23

Biochemical Oxygen Demand (BOD₅)

mgL⁻¹

0.4 - 16.0

4.0 ± 0.3

ND

-

24

Organic-Matter (OM)

mgL⁻¹

2.03 - 17.23

7.75 ± 0.40

5

-

25

Nitrate ion ( ${\text{NO}}_3^{-}$ )

mgL⁻¹

0.55 - 4.70

1.17 ± 0.08

50

0 - 3

26

Phosphate ( ${\text{PO}}_4^{3-}$ )

mgL⁻¹

0.10 - 0.56

0.22 ± 0.01

ND

-