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| {{wikipedia}}
| | #REDIRECT [[Portal:Greywater]] |
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| ==Introduction==
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| Greywater, sometimes also spelled as '''graywater''', '''grey water''' or '''gray water''', is all of the effluent water from a household, except that from the [[Toilet design|toilet]]s, which is sometimes called "blackwater". In addition, if greywater is held for too long (>24 hours in temperate climates), it will become blackwater.{{fact}}
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| The water leaving our homes carries nutrients and value. It may also contain [[pathogens]], and/or harsh chemicals and care should be taken with it; however, it is not a great risk compared to blackwater ([[sewage]]).
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| Redirecting the water we use for tasks such as showering allows us to reclaim some of that value to grow plants and recharge the [[water table]]. It may be necessary to choose our [[soap]]s and [[detergent]]s more carefully, if we use the greywater for watering and fertilizing plants.
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| ==Tips on how to minimize health risks associated with greywater==
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| * Wash yourself after contacting greywater.
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| * Install signage around greywater [[irrigation]] systems or areas.
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| * Do not drink or play with greywater.
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| * Do not allow anything that may be eaten to come into contact with greywater.
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| * Do not allow greywater to pond or run off the property.
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| * Do not wash domestic [[pets]] in greywater or allow pets to drink greywater.
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| * Do not use greywater in public places such as children's play areas or playgrounds, BBQ areas or recreation facilities.
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| ==Suggested projects==
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| * What is the effect of various detergents and soaps in a greywater system? Consider the receiving soil and plant types - the answer may vary.{{sp}}
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| ==Organizations==
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| *[http://watercasa.org/graywaterharvesting.php Water Conservation Alliance of Southern Arizona]
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| ==Projects==
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| *The old [http://www.humboldt.edu/~ccat/waterconservation/marsh/index.html greywater] system at [[:Category:CCAT|CCAT]]
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| ==Interwiki links==
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| * [[Greenlivingpedia:Knoxfield house#Greywater System|Knoxfield greywater system]] - application of greywater treatment in a house in Knoxfield, in the suburbs of [[Melbourne]], [[Australia]]. - ''Greenlivingpedia''
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| ==External links==
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| *[http://www.graywater.net/ Oasis Designs] - The best [http://www.oasisdesign.net/greywater/misinfo/index.htm common errors and best practices] section ever.
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| *The [http://epa.gov/water/ EPA] on water.
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| *[http://agroforestry.net/overstory/overstory99.html Agroforestry] on greywater for Trees and Landscape.
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| *http://www.greywater.com/ - Check out their [http://www.greywater.com/pollution.htm pollution] page.
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| *[http://cahe.nmsu.edu/pubs/_m/m-106.html College of Agriculture and Home Economics New Mexico State University]
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| *[http://www.latimes.com/features/home/la-hm-graywater29mar29,0,7773709.story 3/29/07 LA Times article on Grey water's red tape]
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| *[http://www.owue.water.ca.gov/docs/graywater_guide_book.pdf The graywater guide book from January 1995 (pdf)]
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| **Focuses on Subsurface Drip Irrigation and Mini-Leachfield in California
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| *[http://www.owue.water.ca.gov/docs/Revised_Graywater_Standards.pdf 1997 Revised California Graywater Standards (pdf)]
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| **Main changes:
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| *#Use in commercial, industrial and multifamily projects is now acceptable (and procedures for estimating discharge in those environments are now included). Whereas before only single family homes were allowed.
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| *#One irrigation zone is now acceptable. Whereas before two were required.
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| *#Filters are now sized based on filtration rate. Whereas before a 1 inch filter was prescribed.
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| *[http://www.p2pays.org/ref/18/17818.htm California Revised Greywater Code (html)]
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| *[http://www.ext.colostate.edu/pubs/natres/06702.html Colorado State University - Greywater information]
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| *[http://weblife.org/humanure/chapter9.html Chapter 9 of the Humanure Handbook]
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| **Excellent resource. Punchline: 1 <math>ft^3</math> of Constructed Wetland for every 1 gallon of graywater per day. This must be with a maximum two foot depth, especially considering that Oasis Design states 1/2 to 1 square foot for every 1 gallon of graywater per day.
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| *[http://www.p2pays.org/ref/12/11609.pdf Texas A&M Greywater]
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| **Great pictures
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| {{Stub}}
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| {{Newpageresource}}
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| {{Topicadmin|Lonny}}
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| [[Category:Wastewater]]
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| [[Category:Sewage]]
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