The study intends to assess water scarcity, seasonal variations, and social conflicts through a cross sectional study based on people's perceptions. A well-structured questionnaire coupled with an interview schedule was used for data collection from the 60 households living in the mountainous two villages at Waga union of Kaptai Upazila under Rangamati District, Bangladesh. The study employed a multi-stage random sampling technique. The analysis reveals that 90% of respondents in Sapchari Monpara village mostly rely on spring for water, while 83% of respondents in Debotachari village depend on tube-wells. The study also shows that 80% of the respondents have experienced water scarcity in domestic use, while 90% of respondents have reported short duration of the rainy season causes water scarcity. More than 80% of respondents believe that shifting cultivation in upland catchments causes water quality degradation in the study villages. Most of the respondents obtain water easily in a monsoon at Sapchari Monpara, while others get from tube-wells and traditional wells in all seasons. About (87%) of respondents mention that forest conservation around the water sources can increase water availability.