Grey water is the wastewater from kitchen and bathrooms i.e. from sinks, bathtubs, showers, dishwashers, and clothes washers and does not contain excreta. Wastewater from a community, containing solid and liquid excreta, is known as black water, as per the Central Public Health and Environmental Engineering Organization (CPHEEO). Black water is generated from the toilet, which contains human excreta whereas grey water can be generated from other activities like cooking, washing cloths and dishes.