Non-potable Water Usage
Using native vegetation, such as xeriscaping in desert locations, avoids having to water in the first place. Using greywater or stored runoff from a roof gutter downspout is also an alternative for trees and shrubs, but not for large expanses of grass, which would be difficult to cover. Australian researchers have concluded that there is little evidence for spreading of disease through greywater used in landscaping and that greywater should be applied below the soil surface and not directly on top.
Read more about this topic: Outdoor Water-use Restriction
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