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Table 2 The mean, maximum (Max), minimum (Min) and the associated standard deviation (SD) values corresponding to the various physicochemical parameters measured in water samples from four different areas of Lake Hawassa in dry seasons

From: The impact of sewage effluents on water quality of Lake Hawassa, Ethiopia

Parameter

Sample Site

Parameter

Sample Site

Tikur Wuha

Haile Resort

Gudumale

Hiteta

Tikur Wuha

Haile Resort

Gudumale

Hiteta

EC

Mean

308.0

137

137.5

137.3

Cu

Mean

0.01

ND

0.32

0.034

SD

0.9

0.9

0.4

0.1

SD

0.001

ND

0.02

0.001

Min

307

136

137

137.2

Min

0.010

ND

0.31

0.031

Max

309

138

138

137.4

Max

0.012

ND

0.34

0.035

TRB

Mean

4.3

21.5

10.8

18.2

K

Mean

27.7

26.0

9.2

26

SD

0.01

0.43

0.1

0.1

SD

0.5

0.9

0.2

0.9

Min

4.25

21

10.7

18.1

Min

27.0

25.0

9.0

25.0

Max

4.28

22

10.9

18.3

Max

28.0

27.0

9.5

27.0

T

Mean

21.4

25.3

24.3

22.77

Fluoride

Mean

4.02

5.93

4.18

7.40

SD

0.53

0.08

0.08

0.09

SD

0.005

0.1

0.013

0.087

Min

21.0

25.2

24.2

22.7

Min

4.01

5.8

4.17

7.30

Max

22.0

25.4

24.4

22.9

Max

4.02

6.00

4.20

7.50

TDS

Mean

154.7

87.9

88.3

98.3

Nitrite

Mean

0.007

0.006

0.015

0.005

SD

1

0.1

0.09

1.3

SD

0.001

0.001

0.0001

0.0001

Min

154

87.8

88.2

97.0

Min

0.006

0.005

0.014

0.005

Max

156

88.0

88.4

100.0

Max

0.007

0.006

0.015

0.006

pH

Mean

7.1

9.2

9.2

9.1

Nitrate

Mean

1.63

2.17

80.3

39.3

SD

0.08

0.1

0.07

0.07

SD

0.05

0.1

1.3

0.1

Min

7.0

9.0

9.1

9.0

Min

1.6

2.1

79.0

39.2

Max

7.2

9.3

9.3

9.2

Max

1.7

2.3

82.0

39.4

Fe

Mean

0.180

0.033

0.067

0.014

Sulfate

Mean

ND

1.46

17.3

7.33

SD

0.009

0.002

0.005

0.001

SD

ND

0.05

0.5

0.5

Min

0.17

0.031

0.06

0.014

Min

ND

1.4

17

7.0

Max

0.19

0.035

0.07

0.015

Max

ND

1.5

18

8.0

Mn

Mean

0.20

0.40

0.67

0.67

Phosphate

Mean

0.12

0.19

0.24

0.28

SD

0.006

0.01

0.05

0.05

SD

0.01

0.01

0.01

0.01

Min

0.19

0.39

0.60

0.60

Min

0.11

0.18

0.23

0.28

Max

0.21

0.41

0.70

0.70

Max

0.14

0.20

0.24

0.30

Cr

Mean

0.019

0.014

0.020

0.018

 

SD

0.001

0.001

0.001

0.001

 

Min

0.018

0.014

0.020

0.018

 

Max

0.020

0.015

0.021

0.019