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In the hydrological cycle, there is a water circulation process starting from evatranspiration, condensation, precipitation followed by run-off, infiltration and percolation. From this cycle it is known that water changes form startingfrom a liquid, solid and vapor. In the hydrogeological process, it is the process of obtaining groundwater which will produce groundwater basins. Hydrodynamics can be defined as the science that studies the motion of liquids or the motion of liquid fluids, especially the motion of water. The hydrodynamics of groundwater flow in the Subang groundwater basin in the form of lateral flow is regional flow and is an interbasin flow, where the Subang Groundwater Basin is related to the Non Groundwater Basin area which contains rock formations that act as a fissure medium. Where the groundwater flow pattern of the wells and the location of the springs found in the Non Groundwater Basin Zone indicates the direction of subsurface flow is to flow laterally to the Subang Groundwater Basin. By delineating the watertable (groundwater level), deep groundwater (bore well) and shallow watertable (dug wells and springs) in the Subang Groundwater Basin, it can be seen that the equal position of the watertable at the same location between dug wells and wells is in one aquifer system. the same one. In addition, several areas within the Subang Groundwater Basin are known to be able to absorb local and local water, especially in unconfined aquifer systems which are characterized by the similarity of the watertable positions of dug wells and drilled wells. The role of rock formations capable of absorbing water (infiltration), is also a reference for delineating the recharge zone of the Subang Groundwater Basin. [ABSTRACT FROM AUTHOR]