The underground waters are occupied an extremely of importance place in economy as source of alimentation of population, industrial, etc. Their capture is more advantageous thant of surface water, in majority of coses having superior drinking quality has not needed installation of purification. In Chisinau have been evaluated and characterized the most aquatic horizons; the underground waters from Quaternary rocks; aquatic horizon from Pliocene rocks; the waters from Sarmatian deposit; the waters from Badeniene rocks; the water from Paleocene rocks; etc. A great economic importance has the aquatic horizont from middle and later Sarmatian deposits.