Combined sewer


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Terms & Synonyms

Official WHO Definition

A combined sewer is a sewer which carries storm water, rainwater, waste water and sewerage (American Society of Sanitary Engineering 2007). A building sewer that conveys both sewage and storm water or other drainage (WHO 2006).

Other Definitions


Interpretations and Explanations

A combined sewer is a sewer drainage system which must be graded and sized to carry its estimated peak hydraulic storm loads. It uses the venting requirements normally associated with a sewer drain (World Plumbing Council Working Group 2008).


American Society of Sanitary Engineering (2007) Plumbing Dictionary. Sixth Edition.  WHO (2006) Health aspects of plumbing

WHO Lexicon page (translations and examples)

See also

External Resources


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