The hydrographic network is represented by rivers (Someșul Mic with SW–NE direction, whose catchment area is fully developed on the territory of Cluj County, Crișul Repede and lower Arieș), natural lakes and ponds (Cătina Popii I and II, Geaca, Țaga, etc.)
and lakes of hydropower interest (Beliș-Fântânele, Tarnița and Gilău).
In the northeastern part of Cluj County, Someșul Mic joins Someșul Mare, upstream of Dej, forming the Someș, which flows into the Tisza to the west.

The deep waters are less represented and are characterized by high mineralization.
Relatively rich mineral springs, with sulphates, calcium and sodium chloride, can be found in Dezmir, Cojocna, Gădălin, Sic, Gherla, Leghia, Someșeni, Turda, etc.
The hydrographic network is represented by rivers (Someșul Mic with SW–NE direction, whose catchment area is fully developed on the territory of Cluj County, Crișul Repede and lower Arieș), natural lakes and ponds (Cătina Popii I and II, Geaca, Țaga, etc.) and lakes of hydropower interest (Beliș-Fântânele, Tarnița and Gilău). In the northeastern part of Cluj County, Someșul Mic joins Someșul Mare, upstream of Dej, forming the Someș, which flows into the Tisza to the west.
The deep waters are less represented and are characterized by high mineralization. Relatively rich mineral springs, with sulphates, calcium and sodium chloride, can be found in Dezmir, Cojocna, Gădălin, Sic, Gherla, Leghia, Someșeni, Turda, etc.
Cluj County