The DPI and DoNRE intend to implement a pilot on vacuum sewer collection in An Hai Bac Ward with 110 households to gain concrete experiences on the technology which apparently is apt for waste water collection and treatment in Da Nang because of the high ground water table, narrow walkways/accessibility to connect septic tanks, the pollution of the groundwater and the river with coli bacteria and the unaffordable costs of conventionally separated waste water and drainage water systems to be installed.