Abstract
This study assessed the changes in physical, chemical and bacteriological quality of drinking water stored for a period of three months. Ten (10) different companies’ water samples each of bottled water (B) and sachet water (S) were randomly selected for the study around Ibadan Metropolis. Experimental method was used to check the levels of the different parameters in each of the samples within first week (W) of production and after three months (M) of storage. The results obtained were subjected to both descriptive and inferential statistic. The concentration of total suspended solid were noticed in higher quantity in sachet water; S3 M , S4 M , S5 M and S7 M with values of 1.75±0.35, 1.90±0.14, 1.35±0.21, and 1.55±0.07 mg/L respectively. Total dissolved solid showed increased in all sample analysed after storage as with other chemical element except that lead showed decreased with storage. Almost all the parameters analysed had concentrations within the SON/WHO Standards except pH with samples: B1 W (6.11±0.07), B2 W (6.19±0.01), B10 M (6.45±0.35), S2 W (6.45±0.07), S7 W (5.70±0.14), S9 W (5.80±4.10) and S10 W (5.30±0.00) which were slightly acidic and below the 6.5 minimum standards. There was also growth of Coliform Count of 0.001±0.00 after 3 months of storages in two bottled water (B5 M and B6 M ). The study concluded that storage of potable water for 3 months should changes in the physical, chemical and bacteriological parameters and the intrusion of heavy metal such as Pb in some potable water portray a great deal of harm to consumer when consumed. Keywords : Bacteriological Parameters, Bottled water, Coliform Count, Lead, Storage, Sachet water
Highlights
Water is the elixir of life and abounds on earth but this vast natural resource has been depleted and turned into a scarce commodity with increased usage catering to the needs of ever expanding population
About 97% water is exists in oceans that is not suitable for drinking and only 3% is fresh water wherein 2.97% is comprised by glaciers and icecaps and remaining little portion of 0.3% is available as a surface and ground water for human use
While those stored for the period of three months before analysis were labeled: Calcium: EDTA Titrimetric Method: When EDTA is added to water containing both calcium and magnesium, it combines first with the calcium that is present
Summary
Water is the elixir of life and abounds on earth but this vast natural resource has been depleted and turned into a scarce commodity with increased usage catering to the needs of ever expanding population. The provision of clean and safe drinking water is one of the major infrastructural problems in Nigeria and that is because majority of the people do not have access to reliable potable water sources. This leaves the people to depend on other sources of water such as streams, rivers, and groundwater. These other sources are not always hygienically good for domestic use, making them more vulnerable to water related diseases (Kwasi et al, 2003). As a result duplicates for Physical, chemical and bacteriological bottle or sachet water like any other food product, analysis
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