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{{Wikipedia}}
{{cat header| default.png |Water supply| Please insert a brief topic summary here (take from the summary on the the topic page). }}


==Contamination of water distribution systems==
* Water from rainwater runoff on rock outcrops video [http://www.thewaterchannel.tv/index.php?option=com_hwdvideoshare&task=viewvideo&Itemid=53&video_id=639] - more info at http://www.waterforaridland.com/
In settings with piped water distribution, where demand for water exceeds the supply, the water pressure inside the pipes can become very low and flow becomes very low or even stops. The response of some people who can afford it is to fit a water pump to the outlet, to draw the water out. This further exacerbates the problem of low pressure in the pipes.
 
The low pressure means that [[groundwater]] is drawn into the pipes through leaks in the pipes. It is very common for a significant amount of a city's water supply to be lost to leaks (see [[non-revenue water]] on Wikipedia); however when the leaks flow in the other direction, it creates a serious water quality problem. the dropping below the pressure of the groundwater.<ref>[[User:Chriswaterguy|Chriswaterguy]] has added this information based on his research in Surabaya, East Java, Indonesia, in 1996. See also:
*[http://www.manilawater.com/cs_faq.cfm#wq-2 What causes water contamination?] - from the Manila Water Company's FAQ.
*[http://barbadosfreepress.wordpress.com/2006/11/17/of-low-water-pressure-sucking-taps-and-herbicide-in-barbados/ Of Low Water Pressure, Sucking Taps and Herbicide In Barbados] - describes a scenario where low pressure could lead to serious toxins accidentally drawn into the water supply.
</ref>
 
It is claimed that {{WP|HDPE}} pipe greatly reduces water loss and contamination.<ref>[http://www.oxfordplasticsinc.com/municipal.htm Hdpe Potable Water Pipe] Oxford Plastics Inc (commercial site).</ref>
 
==Notes and references==
<references/>


[[Category:Water]]
[[Category:Water]]
[[Category:Appropriate technology]]
[[Category:Appropriate technology]]
[[Category:Water and sanitation for developing countries]]

Revision as of 20:23, 18 August 2010

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Content 41 pages, 4 subcats, 0 files, 166 nested pages
Main page Water supply
Top page Basic rainwater collection calculations (34,082)

Subcategories

This category has the following 4 subcategories, out of 4 total.

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