Abstract:
Groundwater systems have been the subject of research since ancient times. This article reviews the groundwater studies carried out to date in Bulgaria. It has been established that in the course of the researches carried out from ancient times to the present day, the following directions of scientific research interest have been gradually formed – hydrogeology and groundwater regime, mineral waters, karst groundwater, hydrochemistry and ground water pollution, groundwater modeling, some authors have recently dealt with the issue of European and national legislation.