Abstarct: The city of Khor, the center of the easternmost county of Isfahan province, is located in the south of Dasht-e Kavir (also known as the Great Salt Desert). It has dry and hot weather, annual rainfall of 80 mm, and an average temperature of 20º C. on the basis of climatic indexes, it has an arid climate, and groundwater storage is there fore of great value. The only way to supply agricultural water is the utilization of qanāts or kārīz upon which irrigation depends. Therefore, preservation and maintenance of these invaluable inheritance, reqvires bhth cares and the execution of observations and researches about it. To determine hydro-geological and hydro-geochemical properties of local qanāts —including Kalagho, Dehzir, Mahin Dasht, Arab Abad, and Farrokhi, discharge rate, electrical conductivity, pH, and water temperature of these qanāts were measured onsite in the course of seven occasions Cation and Anion values were measured during three sampling events in 2013-2014 water year. On the basis of obtained results, it can be observed that the qanāts have variable discharge rate and electrical conductivity. Kalagho qanāt with a discharge rate of 43.6 L/s has the highest value of discharge, and Farrokhi qanāt has the lowest value by merely discharging 3.8 lit/s. Regarding electrical conductivity, Farrokhi qanāt also has the lowest conductivity that is 4859 µS/cm, while Arababad qanāt with a conductivity value of 12377 µS/cm has the highest conductivity. Those qanāts whose catchment areas are located adjacent to heights have higher discharge and lower electrical conductivity than those qanāts whose mother wells are situated in the center of the plain (Dasht-e-Kavir). Concerning water temperature of the qanāts , it depends on the length of qanāts and air temperature. Kalagho qanāt with temperature 26.3 º C has the highest temperature, while Farrokhi qanāt has the lowest temperature of 18.8º C. Discharge value of the qanāt of Kalate nahrood with a variation coefficient of 12% shows the most variation among the qanāts, and Kalagho qanāt displays 5% variation that is the least one. By calculating the ion ratios and drawing combined diagrams, it becomes clear that ion exchange is the primary process in determining the water chemistry of the qanāts of the region. With regard to qualitative charts, the predominant type of qanāts’ water is Na-Cl, and consequently it is not suitable for drinking or utilization in agriculture.