Feby Melanie, Ruri Prihatini Lubis, Dasar Martinus Sembiring, Said Iqbal Zaini, Sahri Muda, Rudi Iskandar, Ade Farnan Saragih and Suangro L.H. Sitanggang 2026. ANALYSIS OF FACTORS CAUSING THE LOW SUBSCRIPTION LEVEL OF PDAM TIRTA SARI IN BINJAI CITY. Bulletin of Engineering Science, Technology and Industry. 3, 4 (Jan. 2026), 609–616. DOI:https://doi.org/10.59733/besti.v3i4.157.