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Table 3 Water quality in the identified clusters

From: Assessment of surface water quality and monitoring in southern Vietnam using multicriteria statistical approaches

Cluster

Temp

pH

TDS

EC

TSS

DO

BOD

COD

N-NH4+

N-NO3

NO2-N

Fe

Pb

Cd

As

Cl

1

28.79

7.21

21

44

48

7.04

3.7

12

0.30

0.61

0.00

3.37

0

0

0

6.6

2

29.38

7.12

144

289

25

5.19

3.8

12

0.28

0.96

0.01

1.91

0

0

0

58

3

30.06

7.32

829

1715

59

5.09

3.7

14

0.23

1.10

0.02

2.54

0

0

0

11

4

29.74

7.21

32

71

28

6.28

2.3

9.6

0.19

0.76

0.01

1.94

0.01

0

0

2.2

5

30.37

7.22

37

83

18

6.03

4.4

13

0.55

0.57

0.00

1.48

0

0

0

7.0

6

30.16

7.76

97

221

38

6.60

2.8

9.0

0.26

0.41

0.00

1.90

0

0

0

10.1

7

30.23

6.46

58

129

21

2.68

6.7

18

0.76

0.70

0.02

1.56

0

0

0

24

8

29.75

6.39

204

443

33

1.35

11

27

1.90

0.47

0.01

4.38

0

0

0

0.0

9

30.90

6.14

1481

3067

19

3.09

6.8

19

0.60

1.10

0.03

0.97

0

0

0

1467

10

29.67

6.92

1648

3418

50

1.68

8.1

22

1.06

1.48

0.06

1.67

0

0

0

105

11

30.48

7.07

3496

6862

73

1.92

12

31

1.68

1.98

0.34

1.95

0

0

0

0.0

12

29.15

7.16

608

1237

97

0.68

49

91

15.02

0.06

0.02

1.90

0.02

0

0

0.0

13

29.99

7.20

1144

2387

81

0.77

22

47

5.34

0.34

0.02

2.69

0

0

0

0.0

14

31.43

7.19

8305

16,102

80

4.71

6.8

33

0.17

1.18

0.03

3.36

0

0

0

6119

15

30.81

7.44

21,829

40,967

18

5.21

2.5

12

0.14

0.87

0.10

0.32

0

0

0

0.0

Limits

20

≥ 6

4

10

0.3

2

0.05

0.5

0.02

0.005

0.001

250