The region is rather dry. One of the main problems for people living in rural areas in the province is frequent shortages of water. Although there are some local supplies of water from wells and springs, water from these sources often becomes scarce during the long dry seasons. In some villages local non-government organisations, some supported with international assistance, support small projects to improve village water supplies.
The West Sumba Regency (following the re-organisation in 2007 which created Southwest Sumba Regency and Central Sumba Regency out of parts of West Sumba Regency) is composed of six districts (kecamatan), whose areas (in sq km) and 2010 Census populations are listed below.:
Villages in the area include:
Traditional houses in Tarung-Waitabar village