Groundwater is the largest fresh water resource and radon is a radioactive naturally occurring noble gas that may be found anywhere in soil, air and water due to decay of uranium in rocks.  It is important to investigate the radon in groundwater to safeguard against the health hazard caused due radon. The results presented here are from radon concentrations measured using RAD7 detector in 9 representative groundwater samples collected from hand pumps from southern parts of Roorkee in Haridwar district of Uttrakhand. Radon activity concentration was found in the range of 0.55+0.22 Bq L^-1 to 3.39+0.28 Bq L^-1 with an average value of 2.16+0.37 Bq L^-1. Radon values were compared with United State Environmental Protection Agency value of 11 Bq L^-1. The radon activity trend was found within the permissible limit.