SEWERAGE
sewer, sewerage, cloaca
(noun) a waste pipe that carries away sewage or surface water
sewage, sewerage
(noun) waste matter carried away in sewers or drains
Source: WordNet® 3.1
Etymology
Noun
sewerage (countable and uncountable, plural sewerages)
A sewer system.
Misspelling of sewage.
Source: Wiktionary
Sew"er*age, n.
1. The construction of a sewer or sewers.
2. The system of sewers in a city, town, etc.; the general drainage
of a city or town by means of sewers.
3. The material collected in, and discharged by, sewers. [In this
sense sewage is preferable and common.]
Source: Webster’s Unabridged Dictionary 1913 Edition