نتایج جستجو برای: drinking water systems
تعداد نتایج: 1704566 فیلتر نتایج به سال:
Understanding and managing water quality in drinking water distribution system is essential for public health and wellbeing, but is challenging due to the number and complexity of interacting physical, chemical and biological processes occurring within vast, deteriorating pipe networks. In this paper we explore the application of Self Organising Map techniques to derive such understanding from ...
The incidence of acute gastrointestinal illness (AGI) attributable to public drinking water systems in the United States cannot be directly measured but must be estimated based on epidemiologic studies and other information. The randomized trial is one study design used to evaluate risks attributable to drinking water. In this paper, we review all published randomized trials of drinking water i...
Introduction: Piped water systems are considered to be the gold standard for drinking water according to the Joint Water Monitoring Study. However, poor maintenance of distribution pipes, intermittency of water supply, and sewage water intrusion have contributed to a number of water-borne disease episodes in developed and developing countries. Methods: This study investigated the risk burden r...
BACKGROUND More municipal water treatment plants are using chloramines as a disinfectant in order to reduce carcinogenic by-products. In some instances, this has coincided with an increase in lead levels in drinking water in those systems. Lead in drinking water can be a significant health risk. OBJECTIVES We sought to test the potential effect of switching to chloramines for disinfection in ...
Copper is an essential trace element that may cause intoxication if intake becomes excessive. Young children are at risk of intoxication because of high consumption of drinking water and immature copper metabolism. The aims of this prospective study were to estimate concentrations of copper in drinking water, volumes of drinking water consumed by children, and children's daily intake of copper....
BACKGROUND Recent public attention on drinking water supplies in the aftermath of waterborne infection outbreaks in Walkerton and North Battleford raises questions about safety. We analyzed information on waterborne outbreaks occurring between 1974 and 2001 in order to identify apparent trends, review the current status of monitoring and reporting, and gain a better understanding of the impact ...
Vulnerability of drinking water supply systems (DWSSs) depends on different factors such as failures, loss security, man-made threats, and the change deterioration supply-water quality. Currently, lifespan several DWSSs worldwide has been exceeded, exasperating these issues. The monitoring activity transparency information availability quality are becoming increasingly important in accordance w...
Water supply companies in the UK have a duty under prime UK legislation to notify the Drinking Water Inspectorate of events affecting or potentially affecting the quality of drinking-water supplies. Under the same legislation, the Inspectorate has a duty to investigate each event. After assessing all of the information available, including companies' reports, the Inspectorate advises on the way...
fluoride in drinking water has a profound effect on teeth. since drinking water is an important source of fluoride, the evaluation of the fluoride content of water resources is necessary. temporal variations and spatial distribution of fluoride in drinking water of some selected parts of kurdistan province, iran, have been studied using geographic information system (gis) techniques. thus, 40 v...
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