The average of DO concentrations in the dry season was 6.6 (WI) and 6.8 mg L−1 (WO), whereas that in the rainy one was 4.2 (WI) and 5.6 mg L−1 (WO). For the conductivity, the averages were 114 (WI) and 113.6 μS cm−1 (WO) in the dry season and 78 (WI) and 77.2 μS cm−1 (WO) in the rainy one. The average values of pH were 6.8 (WI) and 6.9 (WO) in the dry season and 5.9 (WI) and 6.2 (WO) in the rainy one. The average concentrations of DBO5 in the dry season were 5.8 (WI) and 3.9 mg L−1 (WO) and those in the rainy one were 7.2 mg L−1 in the both sampled locations. For
the alkalinity, the averages were 41.3 (WI) and 41.1 mg L−1 (WO) and 41.2 (WI) and 40.5 mg L−1 (WO) in the dry and rainy seasons, respectively.