Efficiency of Treatment Plant and Drinking Water Quality Assessment from Source to Household, Gondar City, Northwest Ethiopia
Table 2
Mean ± SD of physicochemical and bacteriological analysis of water samples at different sampling points in Gondar city, Northwest Ethiopia, June 30 to August 30, 2020.
Parameters
Source point
Disinfection point
Main distribution
Tap water
pH
7.17 ± 0.32
6.27 ± 0.15
6.24 ± 0.07
6.88 ± 0.05
Temperature (°C)
24 ± 1
20.33 ± 1.53
19.67 ± 2.08
25.3 ± 0.13
DO (mg/L)
15 ± 1
18.33 ± 1.53
19.17 ± 0.76
6.5 ± 0.04
Turbidity (NTU)
84.3 ± 6.03
4.5 ± 0.74
4.77 ± 0.65
5.15 ± 0.006
TDS (mg/L)
245.7 ± 10.7
62.33 ± 2.52
62.3 ± 2.08
50.7 ± 0.57
EC (μS/cm)
153 ± 14.5
164.3 ± 5.13
168 ± 1.73
170.6 ± 0.1
RC (mg/L)
2.25 ± 0.16
2.95 ± 0.49
3.12 ± 0.6
0.19 ± 0.003
Fluoride (mg/L)
2.7 ± 0.21
2.07 ± 0.25
1.85 ± 0.05
1.17 ± 0.009
Total hardness (mg/L)
310.7 ± 9.02
147.7 ± 2.5
137.7 ± 11.2
62.7 ± 0.5
Total alkalinity (mg/L)
138.7 ± 8.5
75.7 ± 2.1
73 ± 1
32 ± 0.1
Nitrate (mg/L)
76.7 ± 7.64
8.7 ± 3.5
4.7 ± 1.5
3.84 ± 0.005
Sulphate (mg/L)
139.7 ± 5.5
65.3 ± 7.6
59 ± 3.6
1.2 ± 0.008
Phosphate (mg/L)
90.3 ± 4.5
42.8 ± 2.5
40.7 ± 1.5
1.73 ± 0.007
Iron (mg/L)
1.2 ± 0.0.3
0.5 ± 0.15
0.48 ± 0.025
0.15 ± 0.004
Manganese (mg/L)
2.3 ± 0.2
0.28 ± 0.2
0.48 ± 0.24
0.53 ± 0.011
TC (CFU/100 mL)
120.2 ± 0.76
10.13 ± 0.35
10.6 ± 0.1
15 ± 0.26
FC (CFU/100 mL)
50.2 ± 0.61
0.49 ± 0.02
0.6 ± 0.1
1.51 ± 0.03
The parameter was significant at . DO = dissolved oxygen, TDS = total dissolved solid, EC = electrical conductivity, RC = residual chlorine, TC = total coliform, and FC = faecal coliform.
