Table 4.
Physico-chemical parameters characteristic in rainy 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 | 6.8 ± 0.2 | 1.8 ± 0.3 | 252.3 ±27.9 | 1.0 ± 1.6 | 0.1 ± 0.1 | 18.2 ± 2.3 | 43.7 ± 4.3 | 1.5 ± 0.3 |
| 2 | Presidence | 7.7 ± 1.0 | 4.1 ± 1.5 | 247.2 ± 20.6 | 0.8 ± 1.4 | 0.1 ± 0.1 | 30.6 ± 3.9 | 74.0 ± 18.1 | 1.6 ± 0.2 |
| 3 | Ngokro | 6.6 ± 0.1 | 3.0 ± 2.4 | 258.3 ± 46.0 | 7.9 ± 8.5 | 1.2 ± 2.1 | 26.5 ± 4.3 | 43.6 ± 6.9 | 1.3 ± 0.2 |
| 4 | Cyclone | 7.7 ± 0.6 | 3.6 ± 1.0 | 342.2 ± 35.2 | 0.6 ± 0.6 | 0.1 ± 0.0 | 31.4 ± 6.3 | 58.7 ± 16.8 | 1.7 ± 0.2 |
| 5 | CHR | 7.5 ± 0.4 | 3.1 ± 2.1 | 325.2 ±15.1 | 0.7 ± 0.4 | 0.3 ± 0.2 | 20.4 ± 4.1 | 51.9 ± 16.0 | 1.5 ± 0.3 |
| 6 | Basilique | 6.9 ± 0.2 | 1.5 ± 1.0 | 362.5 ± 41.7 | 1.1 ± 0.8 | 8.0 ± 6.6 | 22.9 ± 3.4 | 42.4 ± 8.4 | 1.2 ± 0.4 |
| 7 | INP-HB | 7.5 ± 0.5 | 6.5 ± 10.4 | 291.5 ± 151.3 | 2.6 ± 2.2 | 33.4 ± 17.2 | 39.0 ± 13.9 | 85.4 ± 18.5 | 3.0 ± 1.5 |
| 8 | Lycée Scient. | 7.0 ± 0.1 | 4.8 ± 11.0 | 433.3 ± 26.5 | 1.7 ± 2.1 | 13.5 ± 8.5 | 41.9 ± 14.7 | 118.0 ± 30.2 | 1.9 ± 0.5 |
| 9 | CIE | 6.9 ± 0.1 | 1.4 ± 2.1 | 396.8 ± 151.5 | 8.2 ± 5.5 | 6.7 ± 1.8 | 21.3 ± 5.8 | 77.1 ± 35.8 | 1.5 ± 0.1 |