This community service activity aims to map the land unit of aquifer zones in the fault area of Batumerah Village, Sirimau District, Ambon City, as a strategic step in groundwater resource management. Using geo-electromagnetic methods and Surfer 9.0 software, the activity successfully identified aquifer locations with an optimal depth of 50–80 meters. The collected data were analyzed and presented in the form of a Geographic Information System (GIS) to support integrated and sustainable water management planning. This activity involved village officials and the local community through education and data-based training to enhance their capacity to independently understand and manage water resources. The results showed that a technology-based approach combined with community participation is effective in providing solutions to groundwater availability challenges in fault areas. This activity is expected to serve as a foundation for better water resource management, with recommendations including continuous training, regular data updates, and community education on the importance of water conservation in the face of climate change.
                        
                        
                        
                        
                            
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