(→‎Links: added more legal links)
(→‎Links: typo)
Line 26: Line 26:
*[http://www.owue.water.ca.gov/docs/graywater_guide_book.pdf The graywater guide book from January 1995 (pdf)]   
*[http://www.owue.water.ca.gov/docs/graywater_guide_book.pdf The graywater guide book from January 1995 (pdf)]   
**Focuses on Subsurface Drip Irrigation and Mini-Leachfield
**Focuses on Subsurface Drip Irrigation and Mini-Leachfield
*[http://www.owue.water.ca.gov/docs/Revised_Graywater_Standards.pdf 1997 Revised California Graywater Standards (pdf)]]   
*[http://www.owue.water.ca.gov/docs/Revised_Graywater_Standards.pdf 1997 Revised California Graywater Standards (pdf)]   
**Main changes:
**Main changes:
**#Use in commerial, 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.
*#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.
**#One irrigation zone is now acceptable.  Whereas before two were required.
*#One irrigation zone is now acceptable.  Whereas before two were required.
**#Filters are now sized based on filtration rate.  Whereas before a 1 inch filter was prescribed.
*#Filters are now sized based on filtration rate.  Whereas before a 1 inch filter was prescribed.
*[http://www.p2pays.org/ref/18/17818.htm California Revised Greywater Code (html)]  
*[http://www.p2pays.org/ref/18/17818.htm California Revised Greywater Code (html)]  



Revision as of 09:55, 7 April 2007

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Introduction

Greywater, sometimes also spelled as graywater, grey water or gray water, is all of the effluent water from a household, except that which has touched a significant amount of poop, i.e. all water flowing out of a house except that from the toilets. In addition, if greywater is held for too long (>24 hours in temperate climates), it will become blackwater.[verification needed]

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).

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 soaps and detergents more carefully, if we use the greywater for watering and fertilizing plants.

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