Digital Survey for Customer Satisfaction of Regional Drinking Water Companies (PDAM) using the mWater Application and the Slovin Formula MethodNurkholis Nurkholis, Wilarso, Pria Sukamto, Muhamad Anas Sobarnas, Shahrizan Jamaludin and Umar Tsani ABIO Web Conf., 144 (2024) 03006DOI: https://doi.org/10.1051/bioconf/202414403006