Parameter (n = 200) | Water type | Min. | Max. | SD | Mean ± SE | CV (%) | P value for Z test | Standard [24] | Standard [23] |
pH | Raw | 5.13 | 7.47 | 0.64 | 6.17 ± 0.45 | 10.29 | 0.02* | 6.5 - 8.5 | 6.0 - 8.0 |
Tap | 5.58 | 7.52 | 0.58 | 6.03 ± 0.04 | 9.57 | 5.5 - 8.5 | 6.5 - 8.5 | ||
EC (µS/cm) | Raw | 46.00 | 216.00 | 51.52 | 108.94 ± 3.64 | 47.29 | 0.00* | <2500 | <1500 |
Tap | 34.00 | 103.00 | 11.85 | 74.89 ± 0.84 | 15.83 | <1500 | 0 - 300 | ||
AC (Pt/Co) | Raw | 0.00 | 247.00 | 68.01 | 37.42 ± 4.81 | 181.74 | 0.00* | <15 | <1500 |
Tap | 0.00 | 14.00 | 2.88 | 7.94 ± 0.20 | 36.33 | <15 | <300 | ||
Turbidity (NTUs) | Raw | 0.30 | 49.76 | 11.47 | 6.64 ± 0.81 | 172.69 | 0.00* | <10 | <15 |
Tap | 0.27 | 3.95 | 0.79 | 1.68 ± 0.06 | 47.25 | <5.0 | <5.0 | ||
Total Hardness (mg/L) | Raw | 14.00 | 88.00 | 25.32 | 36.05 ± 1.79 | 70.25 | 0.36 | <150 | <1500 |
Tap | 20.00 | 65.00 | 14.08 | 34.19 ± 00 | 41.19 | <100 | <100 | ||
Total Iron (mg/L) | Raw | 0.00 | 0.39 | 0.12 | 0.0924 ± 0.008 | 124.22 | 0.84 | <1 | <0.3 |
Tap | 0.00 | 0.23 | 0.05 | 0.0907 ± 0.003 | 53.54 | <0.2 | <0.3 | ||
Faecal Coliforms (CFU/100 ml) | Raw | 0.00 | 65.00 | 13.30 | 7.07 ± 0.94 | 188.26 | 0.00* | ≤3 | ≤3 |
Tap | 0.00 | 1.00 | 0.22 | 0.05 ± 0.02 | 436.98 | 0 | 0 |