Sewage (noun)

1. Waste matter carried away in sewers.
2. Water-carried waste, especially human excrement and urine, together with water-borne industrial and commercial waste.
3. The operation or system of disposing of such waste.

Origin:

Sewage is derived from the middle english word "sewage" meaning the waste material carried away in sewers.

Examples:

1. The sewage plant treats the waste before it is released into the river.
2. The sewage system is designed to remove pollutants from the waste water.
3. The sewage pipe was blocked and caused a flood.
4. The sewage backup caused the basement to flood.
5. The sewage treatment process removes harmful bacteria from the waste water.