Abstarct: The study area is located in northwest of Shahrood city, Semnan province. To investigate the hydrogeological and hydrogeochemical properties of multi-color Tash springs, the concentration of main ions and in situ EC, pH values and discharge rate of 6 non-karstic and 1 karstic springs (HS5) were measured monthly from January to October 2019. In this research, development of the karstic formations and also catchment area of the springs has been investigated baxsed on the geology, hydrogeology and hydrochemical factors. The regimes of flow in the springs are mainly diffuse flow. The recession curve of the karstic spring has one recession coefficient that can be attributed to the less development of karstic formation in the catchments area. The results of isotopic study indicate that the springs originate from atmospheric waters and are mainly fed by snow. The dominant water type for karstic springs, is HCO3-Na-Ca and for non-karstic springs is Cl-Na. Cation exchange process also affects the hadrochemical characteristic of the springs. All springs are super-saturated with calcite and dolomite and under-saturated with gypsum and halite. According to Gibbs diagrams, only the karst springs are affected by atmospheric factors and the others are affected by water-rock interaction. Schuler and Wilcox diagrams showed that the only karst spring is suitable for drinking and agriculture usage. The heavy mextals concentrations in the samples showed that the karst spring was not contaminated, but the others, especially black springs has been contaminated with a few trace ions.