Site (N = 6)

Kakoba sewage

Taso sewage

Student t test

Standards

Parameters

Range

Mean

CV (%)

Range

Mean

CV (%)

T

P

[13]

[16]

[12]

Temperature (˚C)

21.10 - 34.1

25.05

18.36

21.30 - 34.0

29.02

15.14

1.528

0.158

25

-

20 - 35

Colour (TCUs)

1319 - 1882

1627.67

14.67

995 - 1746

1414.33

20.62

1.386

0.196

20 - 150

500

300

TSS (mg/l)

167 - 249

214

13.08

118 - 351

182.5

48.39

0.833

0.424

50

100

100

Turbidity (NTUs)

104.5 - 256.0

186.63

29.75

138 - 371.5

261.83

33.62

1.77

0.107

-

300

300

pH

7.77 - 8.46

8.16

3.3

7.73 - 8.90

8.26

5.3

0.485

0.638

5.5 - 9.0

6.0 - 8.0

6.0 - 8.0

Alkalinity (mg/l)

300 - 2911

1390.17

85.6

310 - 2400

1308.33

66.07

0.473

0.647

400

800

-

EC (µs/cm)

824 - 1195

1021.17

17.01

489 - 1102

816

31.56

1.618

0.137

1000

1500

DO (mg/l)

50 - 82.70

63.03

21.97

48.9 - 89.4

68.27

20.56

0.65

0.53

5

-

5

Hardness, CaCO₃ (mg/l)

191 - 4500

1591.00

109.26

827 - 1220

981.33

15.77

0.856

0.412

-

-

-

Mg (mg/l)

41.2 - 608

243.29

92.13

175.1 - 299.1

246.49

21.5

0.034

0.974

-

-

100

Fe (mg/l)

0.81 - 1.46

1.13

22.8

0.70 - 1.75

1

38.02

0.691

0.505

0.2 - 2.0

-

10

PO₄ (mg/l)

18.32 - 35.10

27.11

28.25

21.63 - 38.75

32.2

18.66

1.279

0.23

0.5 - 0.7

-

10

NO₃ (mg/l)

0 - 25

10

122.47

0 - 25

5.83

174.96

0.64

0.536

50

5

-

NH₄ (mg/l)

356 - 400

385.33

5.9

0 - 60

50

48.99

24.585

2.83E−10

0.2 - 4

-

-

Cl (mg/l)

0 - 1000

833.33

48.99

0

0

0

5

0.001

250

500

500