Biadglegne Fantahun, Tessema Belay, Kibret Mulugeta, Abera Bayeh, Huruy Kahsay, Anagaw Belay, Mulu Andargachew
Department of Medical Microbiology, Immunology and Parasitology, Faculty of Medicine, University of Bahir Dar.
Ethiop Med J. 2009 Oct;47(4):277-84.
The consumption of bottled drinking water is becoming increasing in Ethiopia. As a result there has been a growing concern about the chemical, physical and bacteriological quality of this product. Studies on the chemical, physical and bacteriological quality of bottled water is quite scarce in Ethiopia.
This study was therefore aimed to assess the physicochemical and bacteriological qualities of three factories of bottled drinking water products produced in Amhara region.
A Laboratory based comparative study was conducted to evaluate the physicochemical and bacteriological quality of three factories of bottled drinking water produced in Amhara region. Analysis on the quality of bottled drinking water from the sources, wholesalers and retailers were made with World Health Organization and Quality and Standards Authority of Ethiopia recommendations. Triplicate samples from three types of bottled drinking water were randomly collected and analyzed from June, 2006 to December, 2006.
A total of 108 commercial bottled drinking water samples were analyzed. The result showed that except pH of factory A all the physicochemical parameters analyzed were with in the recommended limits. The pH value of factory A tested from sources is 5.3 and from wholesalers and retailers is 5.5 and 5.3, respectively, which is below the normal value set by World Health Organization (6.5-8.0) and Quality and Standards Authority of Ethiopia (6.0-8.5). Our analyses also demonstrated that 2 (16.7%) of the samples tested from sources and 1 (8.3%) from wholesalers of factory B were contaminated with total coliforms, where as 2 (16.7%) samples from retailers were also contaminated with total coliforms. On the other hand, 1 (8.3%) of the samples tested from wholesalers and 2 (16.7%) of the samples tested from retailers of factory A were also contaminated with total coliforms. Total coliforms were not detected from all samples of factory C, fecal coliforms were not also isolated from all samples. Percent of coefficient of variation showed that variations in total coliforms counts were significant with in the samples of both factory A and B (CV > 10%).
Based on the recommended limit of World Health Organization and Quality and Standards Authority of Ethiopia, 7.4% of bottled drinking water sold commercially could be considered unfit for human consumption. Consumers of bottled water should be aware of this.
在埃塞俄比亚，瓶装饮用水的消费量正在不断增加。因此，人们越来越关注该产品的化学、物理和细菌学质量。在埃塞俄比亚，关于瓶装水化学、物理和细菌学质量的研究相当匮乏。
因此，本研究旨在评估阿姆哈拉地区生产瓶装饮用水的三家工厂的理化和细菌学质量。
进行了一项基于实验室的比较研究，以评估阿姆哈拉地区生产瓶装饮用水的三家工厂的理化和细菌学质量。根据世界卫生组织和埃塞俄比亚质量与标准管理局的建议，对来自水源地、批发商和零售商的瓶装饮用水质量进行了分析。从2006年6月至2006年12月，随机采集并分析了三种瓶装饮用水的三份重复样本。
共分析了108份商业瓶装饮用水样本。结果表明，除工厂A的pH值外，所有分析的理化参数均在推荐限值范围内。工厂A从水源地检测的pH值为5.3，从批发商和零售商处检测的pH值分别为5.5和5.3，低于世界卫生组织设定的正常值（6.5 - 8.0）以及埃塞俄比亚质量与标准管理局设定的正常值（6.0 - 8.5）。我们的分析还表明，工厂B从水源地检测的样本中有2份（16.7%）以及从批发商处检测的样本中有1份（8.3%）被总大肠菌群污染，而从零售商处检测的样本中有2份（16.7%）也被总大肠菌群污染。另一方面，工厂A从批发商处检测的样本中有1份（8.3%）以及从零售商处检测的样本中有2份（16.7%）也被总大肠菌群污染。在工厂C的所有样本中均未检测到总大肠菌群，在所有样本中也未分离出粪大肠菌群。变异系数百分比表明，工厂A和工厂B的样本中总大肠菌群数量的变异具有显著性（CV > 10%）。
根据世界卫生组织和埃塞俄比亚质量与标准管理局的推荐限值，7.4%的商业销售瓶装饮用水可能被认为不适于人类消费。瓶装水消费者应意识到这一点。
