Quality of packaged waters sold in ibadan, nigeria

Abstract

The inadequacy of pipe borne water supplies in urban centres is a growing problem. As a result, communities resort to buying water from vendors. In recent years, sachet or bottled water became major sources of drinking water in the households and at work. This study aimed at assessing the chemical and bacteriological quality of packaged water sold in Ibadan, the capital of Oyo State with a population over 3.2 million. A total number of 118 samples of water from several commercial brands sold in the city of Ibadan were selected by simple random sampling. These were of three
categories, those that are packed and sealed in bottles by larger factories (bottled water), those sealed in nylon sachets by small scale industries (A Type), and those put in nylon sachets and manually tied by itinerary vendors (B Type). These samples were subjected to physical, chemical and bacteriological analysis. Hanna C 100 spectrophotometer and analytical quality chemical reagents were used for chemical analyses. MacConkey broth (MB) and Brilliant Green Bile Broth (BGBB) were used for bacteriological analysis using multiple tube method as described in APHA
Standard Methods. The results showed that while the physical parameters were within WHO limits for drinking water quality guidelines values, 30 % of the samples showed rather poor quality. The pH values ranged between 6.6 - 9.7 and aluminum ranged from 0.00 - 0.34 mg/1, fluoride from 0.01 - 1.87mg/l and cyanide from 0.0 - 0.175 which were not within permissible limits. Bacteriological analysis showed that 5% of the 78 samples (A Type), and 28% of the 30 samples (B Type) tested showed positive coliform counts . The dominant bacteria were Klebsiella sp., Streptococcus faecalis
and Pseudomonas aeruginosa. Thus the bottled waters were satisfactory, but the sachet waters were found not satisfactory. Based n the results, it is recommended that the enforcement agencies in the country (NAFDAC and the Ministry of Health) need to get the producers of 'packaged water' to comply with the national drinking water guidelines. Communities on their part should be educated and enlightened on the ill effects of patronizing fake vendors. (Afr. J. Biomed. Res. 11: 251 - 258)

Key Words; water quality, Coliform counts, faecal coliforms, pure-water, water vending, urban water, bottled water.