Abstract: The study area covers the groundwater irrigation project area of the State Hydraulic Works (DSİ) inÇavuşköy village in the Sungurlu district of the Çorum province. The aquifer studied is an unconfinedalluvium which is recharged from precipitation and a stream. The aquifer`s thickness varies between 24m and 35 m, and the well yield ranges between 6 l/s and 20 l/s. High salinity values (Electricalconductivity, EC= 2150-2480 µS/cm) were encountered in groundwaters abstracted from the DSİirrigation wells in the Çavuşköy aquifer. For this reason, the level and spatial extent of EC, boron andresidual sodium carbonate (R.S.C) and the suitability of the groundwaters for irrigation wereinvestigated. The risk of salinization and the usability of the groundwaters for irrigation were evaluatedby interpreting results of chemical analyses of water samples collected first in 2003 and then repeated in2004, and of electrical conductivity logs and temperature logs, in the light of the existinggeological/hydrogeologic structure.According to the evaluation of all data mentioned above, the salinity of the groundwater in thelower part of the area is moderately high, while the sodium, boron and residual sodium carbonatecontents, which are generally significant limitations in irrigation, seem not to be problematic. Since nodrainage problem exists in the soils of the irrigation area, and the salinity tolerance of the crops alreadypreferred by the local farmers is rather high, it is suggested that salt resistant crop types must continueto be grown and that irrigation must be applied under the supervision of experts in order to minimize therisk of salinization.