The physico–chemical characteristics of ground level water have been studied in Mant tehsil of Mathura district of Uttar Pradesh (India). Water samples from 20 bore wells at various locations were collected and analyzed for pH, electrical conductivity, dissolved oxygen, total dissolved solids, total alkalinity, chloride, fluoride, nitrate, phosphate, Na, K, Ca and Mg. Mostly all the samples of water were containing chemical constituents beyond permissible limits prescribed by WHO. The study indicates the need for periodic monitoring of ground water in the study area. This study shows that the quality of ground level water varies from well to well. Higher values of certain parameters at certain bore wells indicate that the water of those bore wells are not suitable for drinking. Based on these findings, it can be recommended that any ground water source in the study area should be tested before use for its suitability and usefulness for daily purpose.