Seventy-five year-old Mary-Jean climbs up on a short ladder to clear the fruit from her rain gutters. “The gutter likes grapefruit, and they like to plug the little hole where the water goes,” she explains, referring to the opening between the gutters and the downspout. The aluminum downspout drains the rainwater that falls on her roof into an 1100-gallon plastic cistern sitting in her backyard. She has two cisterns, and in early September they are halfway full, fed by the summer monsoon rains. Her yard is sparsely landscaped with reddish gravel and a handful of native trees and succulents. If she were not collecting the rain, she would be sweeping the gravel from the street back to the yard after every heavy rain. “It really slows down the water,” she tells me referring to the runoff and pointing to her front yard and steep driveway. The grapefruit tree came with the house, so she kept it. To water the thirsty tree, she connects a hose to the valve at the bottom of the cistern. The hose has little holes on the underside, so she can leave it running. “It works like a slow drip,” she explains. In front of her house there is a small sign made by the city that reads: “This house harvests the rain.” (read more...)