Table 3.
Physico-chemical parameters characteristic in dry season (mean, standard deviation).
| Sample Site | Location | pH | DO (mg/L) | Cond (μS/cm) | NO3− (mg/L) | NH4+ (mg/L) | BOD5 (mg/L) | COD (mg/L) | TNK (mg/L) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Guiglo | 6.9 ± 1.2 | 2.2 ± 2.8 | 291.7 ± 98.2 | 8.3 ± 9.6 | 0.3 ± 0.2 | 17.5 ± 5.1 | 44.8 ± 14.4 | 1.5 ± 0.2 |
| 2 | Presidence | 7.7 ± 1.2 | 4.7 ± 2.4 | 211.6 ± 23.8 | 1.0 ± 0.6 | 0.1 ± 0.1 | 24.6 ± 5.9 | 58.1 ± 13.3 | 1.3 ± 0.1 |
| 3 | Ngokro | 7.0 ± 0.1 | 1.7 ± 1.8 | 326.2 ± 56.4 | 1.0 ± 0.2 | 0.1 ± 0.1 | 27.3 ± 12.9 | 58.6 ± 19.8 | 1.3 ± 0.2 |
| 4 | Cyclone | 7.3 ± 0.2 | 3.0 ± 1.1 | 290.0 ± .9 | 2.5 ± 1.0 | 0.1 ± 0.1 | 23.1 ± 8.0 | 53.3 ± 18.7 | 1.4 ± 0.2 |
| 5 | CHR | 7.6 ± 0.6 | 3.5 ± 1.7 | 298.7 ± 29.8 | 0.7 ± 0.5 | 0.2 ± 0.1 | 18.8 ± 5.0 | 69.9 ± 21.3 | 7.5 ± 1.9 |
| 6 | Basilique | 7.1 ± 0.2 | 2.5 ± 1.4 | 436.0 ± 13.8 | 1.5 ± 0.7 | 0.6 ± 0.8 | 19.6 ± 7.9 | 78.0 ± 15.7 | 1.3 ± 0.5 |
| 7 | INP-HB | 7.3 ± 0.2 | 2.6 ± 1.5 | 382.8 ± 53.6 | 1.8 ± 1.1 | 23.1 ± 5.6 | 24.1 ± 12.6 | 70.3 ± 29.8 | 2.7 ± 0.7 |
| 8 | Lycée Scient. | 7.0 ± 0.1 | 0.2 ± 0.1 | 436.0 ± 13.8 | 2.2 ± 1.1 | 10.7 ± 2.0 | 25.0 ± 11.3 | 75.1 ± 25.6 | 1.9 ± 0.6 |
| 9 | CIE | 6.9 ± 0.1 | 1.4 ± 2.1 | 396.8 ± 151.5 | 8.2 ± 5.5 | 6.7 ± 6.8 | 39.3 ± 5.8 | 65.3 ± 19.8 | 1.5 ± 0.1 |