<![CDATA[The eruption of Mount Ruang in April 2024 resulted in thousands of people losing their homes and being relocated to Permanent Housing (Huntap) in Modisi Village, South Bolaang Mongondow Regency. This study aims to plan the capacity of the Water Supply System (SPAM) that has been built to serve 1,435 residents of Huntap Zone 1 and Zone 2 until 2044. The research employed a case study method with a quantitative approach based on secondary data from PT. Virama Karya (2025) Report, project documents, and EPANET 2.2 simulation results. The analysis was conducted through water demand projection calculations, existing capacity evaluation, and pipeline hydraulic verification using the Hazen-Williams formula. The results showed that water demand increased from 198,030 liters/day (2026) to 266,754 liters/day (2044), with a peak discharge (Qpeak) of 4.63 L/s. The capacity of the 10 L/s Water Treatment Plant and the 300 m³ reservoir remains sufficient until 2044. Hydraulic analysis results indicated that all pipes have headloss < 10 m/100m and SR pressure > 10 mka; however, several pipes have flow velocities below the minimum standard of 0.3 m/s, which is still tolerable. This study recommends routine maintenance and periodic monitoring to ensure system sustainability.]]>
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