Why Has Agriculture Been So Slow to Embrace the Use of Grey Water?

Photo caption: Grey water’s potential largely remains untapped. Photo credit: Ruben Schade, Flickr. Article by Shea Swenson. Modern Farmer – July 25, 2022.

The lightly used water is perfectly safe to reuse on gardens and crops—a ready tool to help farmers in arid regions. But with high cost and little output, large-scale grey water irrigation systems have yet to take off.

The clean water that washes over hands in sinks, spinning down the drain just fractions less pure than what came from the tap; laundry water that pumps into waste pipes by the gallon from households every day; water draining out of a tub that was safe enough for bathers to soak in. That water—slightly used but not fully soiled—is called grey water. […]

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