Green Plumbing

Answer: C -A lack of options for delivery systems is not a risk associated with graywater. Many types of systems are available. In double-piped environments, graywater pipes may be confused with drinking water pipes unless clearly labeled. Storage tanks that are not securely covered risk infiltration by rodents and mosquitos - and are generally not recommended due to the short “safe” life of graywater. Graywater used for irrigation may contaminate groundwater sources that are close to the surface of the soil.