This review presents updated and expanded handpump functionality estimates for 310 councils in the ten regions of Cameroon. Overall, the study estimates that the number of handpumps used as the main source of drinking water supply in Cameroon is 20,572, of which 9,113 are installed in protected hand dug wells (wells) and 11,459 in boreholes. Our findings suggest that about one in three handpumps in Cameroon is nonfunctional, which in 2022 was roughly equivalent to 6,724 inoperative water points. According to this estimate, it is about 44.8 billion CFA francs, or 66.8 million USD, was invested in the construction of water points that are immobilized and do not generate any benefit. The review has found that the community-based management of handpump water supply seems not to have given the expected results. Further, there are questions in relation to the quality of handpump material and the corrosion of handpumps which have not been sufficiently taken into account in the various research projects in Cameroon and Sub-Saharan Africa. Finally, the implementation of post-construction monitoring, physical audits, and handpump rehabilitation campaigns could shed light on these issues in order to improve the performance of handpumps.