India at present is the largest user of groundwater in the world and more than 70% of it is used for irrigation. Along with rainfall the return flow from irrigation is also accounted in recharge to groundwater. This irrigation return flow contains fertilizers that are being applied by the farmers to get better crop yields. Groundwater quality assessment is essential to ensure sustainable safe use of water. Therefore, an attempt has been made to assess the overall groundwater quality of Tonk District by analysing the groundwater samples collected from entire district for twelve basic parameters pH, EC, TDS, TH, Ca2+, Mg2+, Na+, K+, Cl-, SO42-, NO3- and F-. The chemical results were compared with the Bureau of Indian Standards (BIS) and World Health Organisation (WHO) standards for drinking purposes and calculating the water quality index using these parameters that illustrates the overall suitability of groundwater from the study area for human consumption. The Hill Piper plot, Gibb’s plot and scatter plots facilitated in understanding the geochemical processes in the enrichment of groundwater by minerals. The water quality indices revealed the drinking suitability of groundwater in the study area that helps to identify the priority areas to be managed through remedial measures in order to keep water safe for consumption.