Inter Aide Sierra Leone has progressively tested, implemented and adapted a Preventive Maintenance Approach (PMA) in Bombali District of Sierra Leone.  The PMA allows to target 100% functionality:  99% of the maintained hand pumps are in working conditions, only 6 out of 610 being non-functional.

In October 2017, Bombali District is covered by a network of 17 private Pump Technicians, covering the 13 chiefdoms and supervising 610 hand pumps out of the 1400 existing, in more than 517 villages.  Activities started in Tonkolili District end of 2016 with the methodology and tools presented in the following document :

Preventive Maintenance Approach of community hand pumps in Sierra Leone