Sewerage (noun)

1. The system of sewers and drainpipes in a town or city.
2. The contents of a sewer, especially waste matter and sewage.
3. The act or process of removing waste matter or sewage.

Origin:

Late middle english, from old french sewer, from latin exaquare, from ex- "out of" + aqua "water".

Examples:

1. The new housing development would need to be connected to the local sewerage system.
2. The city is facing a major issue of overflowing sewerage due to increased rainfall.
3. We need to improve our sewerage treatment plants to reduce water pollution.
4. The smell of raw sewerage was overpowering as they lifted the manhole cover.
5. The sewerage treatment process involves several stages of filtration and disinfection.