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Divides households with an improved sanitation facility by all households and converts the gap into the number of people still unserved.
Sanitation coverage
Coverage (%) = households with an improved facility / total households x 100; people unserved = households without x average household size
Facilities designed to separate excreta from human contact, such as flush toilets to a sewer or septic tank, and ventilated improved pit latrines.
It also requires that excreta be safely disposed of in situ or treated off site, which is the SDG 6.2 standard.