dc.description.abstract |
Despite the fact that household water storage containers are useful for making water reliable in
locations with intermittent water supply, the deterioration of the water quality in the storage
containers is a public burden that requires in-depth investigation. The aim of this study was to
analyze the microbiological and physicochemical quality of drinking water from tap and
household consumption level in Tana sub-city of Bahir Dar city. Microbiological and
physicochemical analysis of the total of 208 water samples at 74 sampling points and sanitary
surveying were conducted in randomly selected 74 tap water, service reservoir 5 and 129
household’s storage water container and analyzed. Water samples were examined for E. coli.
Using membrane filtration method and the physico-chemical water quality parameters were
measured on-site in the sampling locations. The data Analysis obtained from water quality
analysis and survey results were imported MS excel, SPSS version 23 and one-way ANOVA,
using the Tukey statistical analysis method, which is preferable when comparing three or more
groups. The physicochemical water quality results revealed that the mean values of TDS and pH
comply with the standard limits (500-100 mg/l) and (6.5-8.5) respectively for all sample groups
in dry and wet seasons. Despite this, the mean temperature values of all water samples ranged
from 22.70±0.74
0
C to 26.20±1.35
0
C, which was beyond the permissible limits (15-20
0
C).
Furthermore, the mean values of turbidity measures were within the standards (<5 NTU) for dry
season samples whereas all wet season samples did not comply with this except the mean values
of household treatment unit samples (2.72±1.35 NTU). The microbial water quality analysis
showed that the samples from home treatment units (64.8%) and customer taps (54.5%) had a
lower risk (< 1CFU/100ml) microbial E. coli detection in the dry season while the free residual
chlorine concentration was relatively higher in these sampling points. The Spearman’s
correlation test indicated that there was a strong positive relationship between the E.coli presence
and sanitation and hygiene conditions. Moreover, the sanitary risk scores ranged from low-risk to
high-risk categories, with potential risk factors, such as improper storage container operation,
and placement away from unsanitary conditions, poor hand washing practices during water
collection, and infrequent at-home treatment methods. Thus, this study suggested interventions
on awareness creation and promotions about safe water storage, handling, and treatment
practices in households.
Keywords: Household Storage Containers, Sanitary Inspection, Water Quality Parameters, |
en_US |