Functionality of handpump water supplies: a review of data from sub-Saharan Africa and the Asia-Pacific region

Handpumps are heavily relied upon for drinking water in rural areas of low- and middle-income countries, but their operation and maintenance remain problematic. This review presents updated and expanded handpump functionality estimates for 47 countries in sub-Saharan Africa and the Asia-Pacific region. Our results suggest that approximately one in four handpumps in sub-Saharan Africa are non-functional at any point in time, which in 2015 was roughly equivalent to 175,000 inoperative water points. Functionality statistics for Asia-Pacific countries vary widely, but data gaps preclude a robust region-wide estimate. In spite of data inconsistencies and imperfections, the results illustrate the persistent and widespread nature of rural water supply sustainability concerns.