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Potable water is not well distributed in the world. 1.8 million deaths are attributed to unsafe water supplies every year, according to the WHO. [6] Many people do not have any access, or do not have access to quality and quantity of potable water, though water itself is abundant.
Backflow means the undesirable reversal of flow of a liquid, gas, or suspended solid into the potable water supply; a backflow preventer is designed to keep this from happening. Points at which a potable water system connects with a non-potable water system are called cross connections.
According to the El Dorado Irrigation District in California, the average dual-piped home used approximately 0.17 acre-feet (210 m 3) of potable water in 2006. The average single family residence with traditional piping using potable water for irrigation as well as for domestic uses used between 0.63 acre-feet (780 m 3 ), higher elevation, and ...
Using reclaimed water for non-potable uses saves potable water for drinking, since less potable water will be used for non-potable uses. [47] It sometimes contains higher levels of nutrients such as nitrogen, phosphorus and oxygen which may help fertilize garden and agricultural plants when used for irrigation. [citation needed]
A girl collects clean water from a communal water supply in Kawempe, Uganda.. Water supply is the provision of water by public utilities, commercial organisations, community endeavors or by individuals, usually via a system of pumps and pipes.
Source: Joint Monitoring Programme for Water Supply and Sanitation WHO/UNICEF [1]. Accurate and reliable data regarding coverage in rural areas is unavailable. Conflicting statistics as to the percentages of the population using improved drinking water sources present difficulties in assessing the seriousness of the problem.
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