Edokpayi Joshua N, Rogawski Elizabeth T, Kahler David M, Hill Courtney L, Reynolds Catherine, Nyathi Emanuel, Smith James A, Odiyo John O, Samie Amidou, Bessong Pascal, Dillingham Rebecca
Department of Hydrology and Water Resources, University of Venda, Thohoyandou 0950, South Africa;
Department of Civil and Environmental Engineering, University of Virginia, Charlottesville, VA 22904, USA;
Water (Basel). 2018 Feb;10(2). doi: 10.3390/w10020159. Epub 2018 Feb 7.
Consumption of microbial-contaminated water can result in diarrheal illnesses and enteropathy with the heaviest impact upon children below the age of five. We aimed to provide a comprehensive analysis of water quality in a low-resource setting in Limpopo province, South Africa. Surveys were conducted in 405 households in rural communities of Limpopo province to determine their water-use practices, perceptions of water quality, and household water-treatment methods. Drinking water samples were tested from households for microbiological contamination. Water from potential natural sources were tested for physicochemical and microbiological quality in the dry and wet seasons. Most households had their primary water source piped into their yard or used an intermittent public tap. Approximately one third of caregivers perceived that they could get sick from drinking water. All natural water sources tested positive for fecal contamination at some point during each season. The treated municipal supply never tested positive for fecal contamination; however, the treated system does not reach all residents in the valley; furthermore, frequent shutdowns of the treatment systems and intermittent distribution make the treated water unreliable. The increased water quantity in the wet season correlates with increased treated water from municipal taps and a decrease in the average contaminant levels in household water. This research suggests that wet season increases in water quantity result in more treated water in the region and that is reflected in residents' water-use practices.
饮用受微生物污染的水会导致腹泻疾病和肠道病,对五岁以下儿童影响最为严重。我们旨在对南非林波波省资源匮乏地区的水质进行全面分析。在林波波省农村社区的405户家庭中开展了调查,以确定他们的用水习惯、对水质的看法以及家庭水处理方法。对家庭饮用水样本进行微生物污染检测。对潜在天然水源的水在旱季和雨季进行理化和微生物质量检测。大多数家庭的主要水源通过管道接入自家院子或使用间歇性公共水龙头。约三分之一的照料者认为饮用这些水可能会生病。每个季节的某些时候,所有检测的天然水源粪便污染检测均呈阳性。经过处理的市政供水粪便污染检测从未呈阳性;然而,处理系统并未覆盖山谷中的所有居民;此外,处理系统频繁关闭和间歇性供水使得处理后的水供应不可靠。雨季水量增加与市政水龙头处理后水量增加以及家庭用水中平均污染物水平下降相关。这项研究表明,雨季水量增加导致该地区处理后的水增多,这反映在居民的用水习惯上。