The waste extraction system, also known as the waste reclamation system, sewage and waste reclamation was a plumbing system used during the 24th century, devised to manage and process all bodily wastes aboard starships and starbases. (DS9: "Little Green Men") In 2369, Doctor Julian Bashir took cell samples from the entry of the waste extraction system aboard a Bajoran transport to identify the DNA of the murdered Bajoran criminal Ibudan and possible other DNA. (DS9: "A Man Alone")