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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 from the toilets, which is sometimes called "blackwater". 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.

Suggested projects

  • What is the effect of various detergents and soaps in a greywater system? Consider the receiving soil and plant types - the answer may vary.[expansion needed]

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Pages in category "Greywater"

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