Research Article
Assessment of Groundwater Quality Using Water Quality Index from Selected Springs in Manga Subcounty, Nyamira County, Kenya
Table 3
Statistical analysis of the observed groundwater quality parameters in the Manga region.
| Parameter | Min | Max | Range | Mean | Std. deviation | C.I of mean | KS distance | KS prob | SWilk W | SWilk prob |
| pH | 5.1 | 5.7 | 0.60 | 5.4 | 0.30 | 0.745 | 0.175 | 0.654 | 1.00 | 1.00 | Turbidity | 0.84 | 1.05 | 0.21 | 0.93 | 0.0624 | 0.269 | 0.276 | 0.404 | 0.942 | 0.537 | Nitrate | 0.68 | 1.20 | 0.52 | 0.92 | 0.262 | 0.652 | 0.227 | 0.569 | 0.983 | 0.747 | Phosphate | 0.08 | 0.24 | 0.16 | 0.153 | 0.808 | 0.201 | 0.232 | 0.555 | 0.980 | 0.726 | Calcium | 6.00 | 9.00 | 3.00 | 7.667 | 0.882 | 3.795 | 0.253 | 0.487 | 0.964 | 0.637 | Magnesium | 0.67 | 1.20 | 0.53 | 0.923 | 0.153 | 0.660 | 0.202 | 0.627 | 0.994 | 0.855 | Chloride | 1.00 | 3.00 | 2.00 | 2.00 | 1.00 | 2.484 | 0.175 | 0.654 | 1.000 | 1.000 | Fluoride | 0.00 | 0.00 | 0.00 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | <0.001 | Sulphate | 2.00 | 4.00 | 2.00 | 2.667 | 1.155 | 2.868 | 0.385 | 0.089 | 0.750 | <0.001 | Iron | 0.00 | 0.00 | 0.00 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | <0.001 | Total phosphorous | 0.16 | 0.36 | 0.20 | 0.267 | 0.101 | 0.250 | 0.219 | 0.590 | 0.987 | 0.780 | Total hardness | 8.00 | 10.0 | 2.00 | 9.333 | 1.155 | 2.868 | 0.385 | 0.089 | 0.750 | <0.001 | Total alkalinity | 17.0 | 20.0 | 3.00 | 19.00 | 1.000 | 4.303 | 0.385 | 0.089 | 0.750 | <0.001 | TDS | 22.0 | 25.0 | 3.00 | 23.33 | 1.528 | 3.795 | 0.253 | 0.487 | 0.964 | 0.637 | Coliforms | 0.00 | 0.00 | 0.00 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | <0.001 |
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