connection to public sewerage
Refers to the state of being connected to the main public sewer system, as opposed to a septic tank or private treatment. Often used in real estate or infrastructure contexts.
This property is connected to the public sewer system.
Compound of 本 (ほん, 'main') and 下水 (げすい, 'sewerage'). The exact historical derivation is uncertain, but the term is conventionally associated with connection to the main public sewer.