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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Drinking water contamination from peri-urban Bengaluru, India
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Drinking water contamination from peri-urban Bengaluru, India

机译：来自印度佩恩市孟加拉堡的饮用水污染

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The presence of diarrhoeagenic bacteria such as Escherichia coli in drinking water indicates faecal and sewage contamination. Testing the microbial quality of drinking water at source (n = 29) and households (n = 43) of 29 peri-urban villages of Bengaluru city, indicated that 80% and 93% of samples respectively were unfit for human consumption as per WHO standards, i.e. nil E. coli in 100 ml sample. This also indicated that water gets contaminated further at the point-of-use when compared to the source. Forty-one per cent of the source drinking water samples had high E. coli counts which in turn means that the residing population face moderate to high risk of diarrhoea. A longitudinal study of the microbial quality of drinking water at source of supply (n = 45) was undertaken five times over an eight-month period in a subset of eight villages. Only around 18% of the total samples were microbially safe with nil E. coli/100 ml. Microbial contamination was found to be lower in January and March (30 CFU/100 ml E. coli) when compared to December, May and September (>150 CFU/100 ml). Samples from Chikkakuntanahalli and Kodiyalakeranahalli had. 1000 CFU/100 ml E. coli. Total dissolved solids, calcium, magnesium, alkalinity and hardness in source drinking water of eight selected villages were beyond acceptable levels. The nitrate levels were consistently high and beyond WHO permissible levels. Alarming levels of microbial and chemical contamination of drinking water from the sites press for appropriate remedial measures to reduce health threats, particularly among vulnerable population.
机译：在饮用水中的腹泻细菌如大肠杆菌的存在表明粪便和污水污染。在班加罗鲁市29个孟加拉堡市的饮水饮水中的微生物质量（n = 29）和家庭（n = 43），表明，80％和93％的样品分别不适合人类消费，根据谁标准，即100ml样品中的含量大肠杆菌。这也表明，与源相比，水在使用点进一步污染。 40％的源饮用水样品具有高大肠杆菌计数，这反过来意味着居住的人群面临中度至高的腹泻风险。在供应源（n = 45）的饮用水中微生物质量的纵向研究在八个村的一部分中的八个月内进行了五次。只有约18％的总样品的微生物安全地用NIL大肠杆菌/ 100ml。与12月，5月和9月（> 150 CFU / 100毫升）相比，1月和3月（＆lt 19 cfu / 100 ml大肠杆菌）发现微生物污染较低。 Chikkakuntanahalli和Kodiyalakeanahalli的样本有。 1000 cfu / 100 ml大肠杆菌。八个选定村庄的源饮水中总溶解的固体，钙，镁，碱度和硬度超出可接受的水平。硝酸盐水平始终如一，超出世卫组织允许的水平。从地点的饮用水的微生物和化学污染水平的令人惊叹的微生物和化学污染，以获得适当的补救措施，以减少健康威胁，特别是弱势群体。

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