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What is gray water?
By E. E. Kane
Posted in: Conservation, Home, Utilities
Gray water (also called graywater or grey water) is water collected after use in bathtubs, sinks, and washing machines. It should not be confused with black water, that which is used in toilets, kitchen sinks and dishwashers.
Gray water can be reused in residential landscaping and non-edible gardens, saving the homeowner money and relieving sewers or septic systems.
Because gray water can contain traces of human pathogens or harmful microorganisms, some states do not allow gray water reuse. Where gray water is legal, you may need a permit before a plumber can redirect the water outdoors.
Aside from the plumber's fee, gray water poses a few challenges. Safe use dictates soaking methods rather than sprinkling, and the high alkalinity is not suitable for all plants.
Consider gray water if you live in an arid region. Those who live where rain is plentiful might consider using a rain barrel or cistern instead.
