Objective of the study was to evaluate water management efficiency at Karaigorou’s irrigated rice fields. Efficiency of water distribution amongst users was assed using equity and percent grower satisfaction, as key indicators of effectiveness. Survey conducted amongst irrigated water users revealed that water was not fairly distributed among rice growers. Equity index found was 23% which was much higher than reference value of this indicator of 10%. User satisfaction of the watering scheme varies from 70% to 82% between the wet and the dry seasons of irrigated rice, respectively. These low values of user fulfillment clearly indicate insufficient water availability in the perimeter’s irrigation scheme. Water distribution inefficiency was most likely due to degraded irrigation channels, weak water management skills, bad crop growing calendar and bad setup of irrigation canals. It is suggested that inefficiency can be overcome by improved growers capacities, and good cooperative organization.