The study area Siwan block is located in Kaithal district of Haryana state. The geocoordinates of the study area are latitudes 29.83 to 29.99 and longitudes 76.17 E 0 0 0 N N to 76.45 E and covers an area of 291.49 sq. km. Geologically alluvium and 0 geomorphologically alluvial plain are present. The main objective was to assess groundwater quality for drinking purpose in the study area. In the study area eight groundwater samples were collected in 250 ml double capped plastic bottles from tube wells. Geo-coordinates of sample locations were noted with the help of mobile GPS. Chemical analysis of eight groundwater samples were done using Tamilnadu Water Supply and Drainage (TWAD) Board, Chennai prepared Field Water Testing kit for twelve chemical parameters viz. pH, alkalinity, hardness, chloride, total dissolved solids (TDS), fluoride, iron, nitrite, nitrate, ammonia, phosphate and residual chlorine. Results of groundwater samples analysis were compared with BIS (IS 10500:2012) drinking water standards to know groundwater quality for drinking purpose. In the study area pH ranges 7 to 8, alkalinity 260 mg/l to 510 mg/l, hardness 70 mg/l to 340 mg/l, chloride 50 mg/l to 70 mg/l, TDS 480 mg/l to 996 mg/l, fluoride 1.0 mg/l to 5.0 mg/l, iron nil in all the eight groundwater samples, ammonia nil to 0.5 mg/l, nitrite 0.2 mg/l to 0.5 mg/l, nitrate 75 mg/l to 100 mg/l, phosphate and residual chlorine nil in all the eight groundwater samples. The study is highly useful for planning and monitoring of groundwater quality in the study area.