A network of sewers which serves one or more catchment areas.

a network of sewer pipes used to collect wastewater and/or storm water and transport it to a wastewater treatment plant or sewer outfall.

In a wastewater system, a collection system is a system of pipes which receives and conveys sewage and/or storm water.

A method of gathering liquid into a single contained spot to prevent runoff and contamination of water sources.

An ACS module that controls and accounts for payments collected by the US Customs Service.

(USA) In U.S. Customs, it is the process that controls and accounts for payments collected by the agency.