<![CDATA[Kalibukbuk Village in Buleleng District, Bali, is a coastal tourism village that relies heavily on groundwater for domestic and tourism-related needs. Increasingly intensive groundwater extraction without adequate conservation efforts raises the risk of seawater intrusion, which degrades groundwater quality and threatens the sustainability of clean water services. At the same time, tourism activities generate solid waste that has not been managed optimally, thereby reducing environmental quality and tourism attractiveness. This community service program aimed to anticipate the risk of seawater intrusion and improve waste management practices through environmental education and the application of simple technologies in Kalibukbuk Village. The methods employed a participatory approach through socialization on seawater intrusion, the introduction and demonstration of infiltration wells and biopore holes, education on waste recycling, the use of Eco Bin, and composting practices for students at SMPN 8 Singaraja, as well as clean tourism education and a beach clean-up campaign involving the local TPS3R. The results showed an increase in public understanding and awareness of groundwater conservation, as well as improved student knowledge of the 3R concept, waste segregation, and composting. An evaluation involving 30 students showed that the average pre-test score increased from 50 to 90 on the post-test, indicating an 80% improvement in understanding. The village clean tourism activities also strengthened collective awareness of the importance of environmental cleanliness for public health and the sustainability of a tourism-based economy. Overall, these findings indicate that participatory education and simple technologies constitute an effective initial step for mitigating seawater intrusion and improving waste management in coastal tourism villages.]]>
