Sullage is a term used to describe wastewater from households, businesses, and industries. It can contain a range of pollutants, from organic matter to chemicals and heavy metals. There are several synonyms for the word sullage, including wastewater, sewage, effluent, and greywater. Wastewater refers to any water that has been used for washing, bathing, and other purposes and contains impurities. Sewage refers specifically to the human waste and wastewater that is discharged from toilets and other household drains. Effluent is a more general term that can refer to any liquid discharged from a facility, while greywater refers to the relatively clean water from showers, laundry, and sinks that can be reused for irrigation and other non-potable purposes.