Green Plumbing

Answer: A - Graywater from tubs and showers is almost always suitable for reuse, sometimes with varying degrees of treatment depending on end use. Water drained from kitchen sinks and clothes washers is also suitable in some cases; however, the food remnants in kitchen sink water and potential fecal traces in households that launder diapers can make such graywater less useful due to contamination and pollution concerns. These latter two categories can be more useful with additional cleaning and purification.