Location | pH | Turbidity (NTU) | Dissolved Oxygen (mg/L) | Electrical conductivity (mS/cm) | Alkalinity (mg/L) | Total hardness (mg/L) | Chloride (mg/L) | Nitrate (mg/L) | Sulphate (mg/L) |
Erunwen 1 | 5.28 ± 0.38 | 1.91 ± 1.70 | 6.42 ± 0.98 | 0.13 ± 0.04 | 18.30 ± 6.91 | 18.00 ± 15.28 | 8.50 ± 2.60 | 6.05 ± 5.30 | 5.17 ± 4.84 |
Erunwen 2 | 5.74 ± 0.16 | 2.03 ± 3.58 | 6.00 ± 0.88 | 0.65 ± 0.90 | 28.20 ± 4.95 | 14.67 ± 2.49 | 5.60 ± 1.46 | 3.93 ± 2.15 | 4.67 ± 4.17 |
Erunwen 3 | 5.49 ± 0.54 | 0.64 ± 0.34 | 5.95 ± 0.76 | 0.11 ± 0.05 | 18.60 ± 5.18 | 19.33 ± 10.27 | 4.00 ± 2.17 | 4.58 ± 2.31 | 3.33 ± 1.89 |
Agbele | 5.23 ± 0.50 | 0.86 ± 0.37 | 6.24 ± 0.75 | 0.15 ± 0.06 | 24.60 ± 11.19 | 25.67 ± 28.52 | 8.20 ± 5.11 | 4.79 ± 2.73 | 4.90 ± 2.21 |
Kokoro Abu | 4.23 ± 0.31 | 0.50 ± 0.41 | 5.94 ± 1.12 | 1.49 ± 0.26 | 15.88 ± 4.92 | 65.50 ± 17.97 | 69.60 ± 1.36 | 50.83 ± 11.46 | 5.00 ± 3.89 |
Eyita 1 | 6.01 ± 0.22 | 0.59 ± 0.49 | 6.21 ± 0.66 | 0.36 ± 0.15 | 34.40 ± 14.18 | 48.75 ± 18.61 | 8.30 ± 1.33 | 7.99 ± 1.42 | 2.00 ± 0.71 |
Eyita 2 | 5.68 ± 0.69 | 0.28 ± 0.13 | 6.28 ± 0.55 | 0.19 ± 0.07 | 19.30 ± 9.82 | 22.50 ± 13.35 | 8.00 ± 3.78 | 6.85 ± 1.84 | 3.33 ± 1.03 |
Eyita 3 | 6.07 ± 0.27 | 0.64 ± 0.62 | 6.40 ± 0.71 | 0.28 ± 0.08 | 34.60 ± 10.80 | 46.25 ± 34.66 | 6.50 ± 2.19 | 5.39 ± 1.39 | 2.00 ± 0.41 |
Ikosi Ketu | 4.22 ± 0.43 | 2.20 ± 2.55 | 5.58 ± 0.67 | 1.10 ± 0.32 | 23.00 ± 12.39 | 58.50 ± 18.45 | 40.60 ± 3.81 | 35.86 ± 4.38 | 2.00 ± 0.41 |
Oshodi | 4.75 ± 0.28 | 0.41 ± 0.29 | 5.59 ± 0.47 | 0.66 ± 0.25 | 24.30 ± 8.39 | 30.00 ± 26.84 | 35.90 ± 11.92 | 10.53 ± 1.47 | 2.50 ± 0.71 |
Ogudu | 4.17 ± 0.26 | 1.05 ± 0.94 | 5.39 ± 0.94 | 2.51 ± 0.69 | 17.80 ± 4.57 | 95.50 ± 16.35 | 72.50 ± 47.22 | 73.18 ± 24.31 | 12.67 ± 8.72 |
Akesan 1 | 5.09 ± 0.29 | 0.16 ± 0.08 | 6.87 ± 1.87 | 0.47 ± 0.09 | 20.50 ± 7.81 | 25.00 ± 18.55 | 12.60 ± 3.34 | 18.69 ± 15.20 | 4.50 ± 2.86 |
Akesan 2 | 5.59 ± 0.22 | 0.42 ± 0.42 | 6.33 ± 1.70 | 0.34 ± 0.09 | 27.00 ± 6.00 | 27.50 ± 5.17 | 8.50 ± 2.59 | 8.54 ± 2.52 | 5.67 ± 2.05 |
Ilado | 5.12 ± 0.41 | 0.39 ± 0.08 | 6.86 ± 1.27 | 0.13 ± 0.09 | 22.00 ± 8.86 | 19.00 ± 10.61 | 7.70 ± 1.69 | 3.95 ± 2.93 | 2.17 ± 0.85 |
Ogijo* | 5.70 ± 0.27 | 1.44 ± 1.92 | 6.12 ± 0.91 | 0.16 ± 0.07 | 25.70 ± 9.56 | 36.50 ± 23.51 | 8.20 ± 2.48 | 4.49 ± 1.51 | 2.83 ± 0.24 |
Ibafo* | 5.64 ± 0.31 | 0.26 ± 0.10 | 6.55 ± 1.30 | 0.74 ± 0.16 | 25.00 ± 5.70 | 57.50 ± 12.44 | 20.80 ± 2.04 | 24.43 ± 7.74 | 2.33 ± 0.94 |
Magboro* | 6.20 ± 0.16 | 0.28 ± 0.13 | 6.43 ± 1.63 | 0.39 ± 0.07 | 42.00 ± 12.08 | 35.70 ± 5.45 | 7.10 ± 4.00 | 6.76 ± 1.96 | 1.67 ± 0.47 |
Ilupeju Agbara* | 4.68 ± 0.40 | 0.23 ± 0.10 | 6.44 ± 1.43 | 0.33 ± 0.11 | 14.50 ± 6.78 | 14.00 ± 10.61 | 11.80 ± 3.41 | 8.93 ± 2.75 | 3.67 ± 1.25 |
Lusada 1* | 5.23 ± 0.29 | 0.24 ± 0.08 | 6.70 ± 1.30 | 0.16 ± 0.07 | 21.50 ± 7.52 | 21.50 ± 10.16 | 8.40 ± 3.44 | 4.36 ± 2.86 | 2.83 ± 1.03 |
Lusada 2* | 5.60 ± 0.31 | 0.30 ± 0.15 | 6.94 ± 1.46 | 0.19 ± 0.07 | 22.50 ± 8.37 | 19.00 ± 8.40 | 7.59 ± 2.59 | 4.68 ± 3.38 | 6.17 ± 6.25 |
WHO, 2011 | 6.5 - 8.5 | - | - | - | - | - | - | 50.0 | - |