VISTA, CALIF.—One of the many ways commercial facilities are reducing water consumption is to use greywater. Greywater is referred to as “gently used” water coming from restroom sinks, kitchen sinks, showers, etc.
These facilities are often “doubled plumbed,” with greywater going into storage tanks and water from toilets and urinals discharged into sewer systems.
While some greywater may look discolored, even “dirty,” it is usually safe, even beneficial to use to irrigate vegetation, even though it should not be used for human consumption.
Because facilities that are landscaped often use more water for vegetation than anywhere else, if water can be reused...