Sampling sites

Nitrates in water (mg/l)

Nitrates in sediments (mg/l)

Dry season

Wet season

Dry season

Wet season

A

1.6 ± 0.01^B

2.2 ± 0.1^A

1.4 ± 0.1^B

1.4 ± 0.4^B

B

1.6 ± 0.01^B

2.1 ± 0.02^A

1.5 ± 0.3^A

2.01 ± 0.1^A

C

1.4 ± 0.01^C

2.1 ± 0.1^A

1.3 ± 0.2^B

2.04 ± 0.1^A

D

1.4 ± 0.02^C

1.9 ± 0.2^A

1.1 ± 0.1^B

2.2 ± 0.5^A

E

1.8 ± 0.02^A

2.1 ± 0.2^A

1.6 ± 0.1^A

1.7 ± 0.2^B

F

1.4 ± 0.03^C

1.9 ± 0.2^A

1.1 ± 0.1^B

2.0 ± 0.04^A

Mean

1.5 ± 0.02

2.1 ± 0.2

1.3 ± 0.15

1.89 ± 0.22