Groundwater is the main source of drinking water for many small agricultural communities. Nitrate concentration in groundwater is a major problem in Nira River basin area, which is mainly due to the run off or seepage of chemical fertilizers from the agricultural field. A total of 45 water samples were collected in the period of post-monsoon (POM) winter and pre-monsoon (PRM) summer seasons from bore wells. The water samples were analysed using standard methods of APHA suggested for analysis of nitrate. Groundwater quality parameter varies spatially in different seasons. In the present study, spatio-temporal variation in nitrate levels in bore wells of Baramati Tahsil area is examined. The results of analysis showed that nitrate concentration in POM and PRM was above the maximum permissible limit of WHO and BIS recommended for drinking purpose. In POM 74% groundwater samples from canal irrigated area and 11% from non-canal-irrigated area were above the standard limit of WHO and BIS....