Month

Sampling station

(mg/l)

Mean ± SD

(mg/l)

Mean ± SD

(mg/l)

Mean ± SD

St-1

3.53

4.63

1.0

April

St-2

3.71

3.29 ± 0.6

7.11

6.61 ± 1.8

2.94

2.55 ± 1.4

St-3

2.63

8.1

3.66

St-1

3.0

5.2

1.79

May

St-2

4.4

3.64 ± 0.7

8.25

7.61 ± 2.2

1.79

2.38 ± 1.0

St-3

3.51

9.37

3.55

St-1

2.1

3.44

0.51

June

St-2

2.31

2.03 ± 0.3

3.9

3.68 ± 0.2

1.0

0.78 ± 0.25

St-3

1.74

3.69

0.82