Mythri H, Chandu G N, Prashant G M, Subba Reddy V V
Department of Community Dentistry, College of Dental Sciences, Davangere, Karnataka, India.
Indian J Dent Res. 2010 Oct-Dec;21(4):515-7. doi: 10.4103/0970-9290.74223.
Water is a divine gift. People quench their thirst without questioning the source of water. But, apprehension about contaminants in municipal water supplies along with increased fear of fluorosis made bottled drinking water as one of the important tradable commodities.
The objectives of the study were to determine and compare the fluoride and bacterial contents of commercially available bottled drinking water and municipal tap water in Davangere city, Karnataka.
Fifty samples of 10 categories of bottled drinking water with different batch numbers were purchased and municipal water from different sources were collected. Fluoride levels were determined by an ion-selective electrode. Water was cultured quantitatively and levels of bacteria were calculated as colony-forming units (CFUs) per milliliter.
Descriptive analysis of water samples for fluoride concentration was in the range of 0.07-0.33 for bottled drinking water, Bisleri showing the highest of 0.33. A comparison of the mean values of microbial count for bottled drinking water with that of municipal tap water showed no statistically significant difference, but was more than the standard levels along with the presence of fungus and maggots.
The fluoride concentration was below the optimal level for both municipal tap water and bottled drinking water. CFUs were more than the recommended level in both municipal tap water and bottled drinking water.
水是天赐之物。人们不假思索地饮水解渴，却很少质疑水的来源。然而，对市政供水污染物的担忧以及对氟中毒恐惧的增加，使得瓶装饮用水成为重要的可交易商品之一。
本研究旨在测定并比较卡纳塔克邦达万盖尔市市售瓶装饮用水和市政自来水的氟含量及细菌含量。
购买了10类不同批次编号的50份瓶装饮用水样本，并采集了不同水源的市政用水。采用离子选择电极法测定氟含量。对水样进行定量培养，并以每毫升菌落形成单位（CFU）计算细菌含量。
瓶装饮用水氟浓度的描述性分析结果为0.07 - 0.33，其中比斯里（Bisleri）品牌最高，为0.33。瓶装饮用水与市政自来水微生物计数平均值的比较显示，二者无统计学显著差异，但均高于标准水平，且存在真菌和蛆虫。
市政自来水和瓶装饮用水的氟浓度均低于最佳水平。市政自来水和瓶装饮用水的CFU均高于推荐水平。
