Table 1 Seasonal and annual mean values of physicochemical qualities from the final effluent.

pH

5.53 - 9.38

6.65 ± 0.97

6.40 ± 0.29^C

7.03 ± 1.31^C

6.10 ± 0.58^D

6.70 ± 0.34^C

Temperature (°C)

13.04 - 27.21

20.95 ± 4.37

19.82 ± 3.01^A

24.73 ± 2.28^B

15.24 ± 2.00^A

20.98 ± 0.98^A

Turbidity (NTU)

1.59 - 25.5

6.68 ± 5.73

6.25 ± 4.86^C

9.64 ± 7.32^C

3.81 ± 0.93^C

3.68 ± 2.24^D

TDS (mg/l)

121 - 244

144 ± 19.76

149.50 ± 0.54^A

133.26 ± 6.80^A

144.77 ± 10.68^B

168.40 ± 42.48^B

DO (mg/l)

1.16 - 9.46

5.02 ± 2

4.15 ± 0.90^C

5.38 ± 2.73^A

4.85 ± 1.25^C

4.96 ± 1.56^B

COD (mg/l)

10 - 975

126 ± 230.6

46.00 ± 41.69^A

238.00 ± 333.71^A

49.00 ± 26.92^{A B}

34.82 ± 17.98^B

NO₃^- (mg/l)

4.4 - 18.8

10.43 ± 3.8

11.75 ± 8.14^A

8.73 ± 2.08^A

13.10 ± 0.95^A

7.96 ± 5.22^A

NO₂^- (mg/l)

0.03 - 0.46

0.21 ± 0.12

0.12 ± 0.07^B

0.19 ± 0.08^{A B}

0.21 ± 0.15^B

1.30 ± 1.85^A

PO₄^3- (mg/l)

0.12 - 4.3

2.02 ± 1.40

0.33 ± 0.18^A

4.81 ± 0.58^A

2.16 ± 1.71^A

3.98 ± 0.13^A