The Suko Mulyo Plain area, Sepaku, North Penajam Paser is experiencing problems with uneven groundwater availability and limited groundwater supply for clean water sources. The purpose of the study was to determine the condition of rock layers based on resistivity values and identify the presence of aquifers. The method used is a configuration geoelectric survey schlumberger 200 meters 5 location points which is then processed with IPI2Win. IPI2Win serves to visualize the modeling of the aquifer layer. Geoelectric modeling results show that the hydrostratigraphy of the Suko Mulyo Plain Area consists of claystone, limestone, sandstone, quartz sandstone and claystone with coal insertion with a resistivity range of 56.2 to 3.65 m. In addition, observation and secondary data processing resulted in geomorphological interpretations in the form of structural denudational terrace and structural ridges. These rock formations and geomorphological units affect the presence of aquifers identified in the structural valley plains of Dusun 3 and the structural hills of Dusun 1 with a thickness of 52.6 meters and 64.3 meters. The results of the study are expected to be used as a reference for determining groundwater drilling points and as a basis for consideration of government officials in determining groundwater resource management policies. Kawasan Dataran Suko Mulyo, Sepaku, Penajam Paser Utara mengalami permasalahan ketersediaan air tanah yang tidak merata dan keterbatasan suplai air tanah untuk sumber air bersih. Tujuan penelitian untuk mengetahui kondisi lapisan batuan berdasarkan nilai resistivitas dan mengidentifikasi keberadaan akuifer. Metode yang dilakukan adalah survei geolistrik konfigurasi schlumberger lintasan 200 meter pada 5 titik lokasi yang kemudian diolah dengan IPI2Win. IPI2Win berfungsi memvisualisasikan pemodelan lapisan akuifer. Hasil Pemodelan geolistrik menunjukkan bahwa hidrostratigrafi Kawasan Dataran Suko Mulyo terdiri dari batu lempung, batu gamping, batu pasir, batu pasir kuarsa dan batu lempung dengan sisipan batubara dengan rentang resistivitas 56,2 hingga 3,65 m. Selain itu, observasi dan pengolahan data sekunder menghasilkan interpretasi geomorfologi berupa Teras Denudasional Struktural dan Satuan Struktural. Formasi batuan dan satuan geomorfologi ini berpengaruh terhadap keberadaan akuifer yang teridentifikasi pada Dataran lembah struktural Dusun 3 dan Perbukitan struktural Dusun 1 dengan ketebalan 52,6 meter dan 64,3 meter. Hasil penelitian diharapkan dapat dijadikan acuan menentukan titik pengeboran air tanah dan sebagai dasar pertimbangan perangkat pemerintahan dalam penentuan kebijakan pengelolaan sumber air tanah.
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