In this study, an attempt has been made to assess the quality of groundwater and municipal water for drinking purposes in the villages of District (Haryana). Ground water and municipal water samples collected from different villages of Kaithal District, Haryana were analyzed for their physico- chemical characteristics. The analysis results were compared with the WHO, ICMR and BIS standards of drinking water quality parameters with the following physico-chemical water quality parameters, namely pH, total dissolved solids, total alkalinity, total hardness, chloride, fluoride, calcium, magnesium, etc. From the analysed data it was found that parameters like fluoride, total dissolved solids, total hardness and magnesium exceed the maximum desirable and maximum permissible values for drinking purpose. Fluoride concentration, in particular, was exceeding the maximum permissible values for drinking purpose by all the standards, which is a serious concern for public health. Fluoride is responsible for dental and skeletal fluorosis. It is emerging as a social problem in many villages of northern India.