Parameter

S₁

S₂

S₃

Mean value

Grand mean

variance

Standard deviation

(mg/L)

(˚)

Nitrate

0.04

0.03

0.03

0.03

Phosphate

5

7.21

3.92

5.38

DO

0.71

0.5

0.2

0.47

BOD

184.71

186.5

172

181.07

Mean value

47.62

48.56

44.04

11.69

0.92

0.96

Iron

0.001

0.001

0.1

0.034

Manganese

1.53

1.18

1.47

1.4

Lead

18.9

21.7

39.7

26.8

Mean value

6.8

7.6

13.8

9.4

0.17

0.41