Research Article

Assessment of Bacteriological and Physicochemical Quality of Drinking Water from Source to Household Tap Connection in Nekemte, Oromia, Ethiopia

Table 1

Physicochemical analysis of source, reservoir, and disinfection points water samples.

ParametersSourcesDisinfection pointMain distribution tankTap water

N33381
Temp ( C) ± SE20.5 ± 0.5a20.8 ± 0.4a20.8 ± 0.5a20.9 ± 1.0a
pH ± SE6.82 ± 1.7a6.87 ± .01a7.03 ± 01a6.73 ± 0.1a
Turbidity (NTU) ± SE12 ± 2aNilNil0.89 ± 0.5b
TDS (mg/l) ± SE47.8 ± 2.6a36 ± 2b32 ± 1b21.0 ± 2.8c
EC (µS/cm) ± SE70 ± 2a46 ± 1b45 ± 0.00b65.5 ± 4.5a
NO3 (mg/l) ± SE1.8 ± 0.2b1.3 ± 0.3b1.3 ± 0.2a3.6 ± 1.1a
PO4−3 (mg/l) ± SE1 ± 0.52a0.6 ± .26a0.56 ± .21a0.75 ± 0.14a
FCR (mg/l) ± SE0.20 ± 0.1a0.23 ± .01a0.28 ± .01a0.21 ± 0.23a
S04−2 (mg/l) ± SE4 ± 1.7b14 ± 3.6a14.5 ± 3.5a17.8 ± 3.4a
Colour (mg/) ± SE91 ± 8.5a3 ± 2.6dNil ± 0d0.0
Mn+2 (mg/l) ± SE1 ± 0.1a0.3 ± .12b0.2 ± 0.01b1.6 ± 0.3a
Fe+2 (mg/l)1.19 ± 0.1a0.19 ± 0.0c0.18 ± 0.0c0.67 ± 0.2b
TC (CFU/100 ml) ± SE120a109ab100ab38 ± 15.7c
FC (CFU/100 ml) ± SETNT12a5.5b1.7 ± 2.9c

Data are average of triplicates; numbers followed by the same letter superscripts in the same row do not vary significantly by Duncan’s multiple range test at ; SE: standard error; TNT: too numerous to count.