<p>In recent decades, there has been a significant challenge of groundwater contamination due to the continuous release of harmful chemicals from industrial and mining sites. Several sophisticated techniques have been developed for in-situ removal of groundwater contaminants among that the technology of Permeable reactive Barrier (PRB) is considered as cost-effectiveness strategy, high efficiency, and sustainability in addressing a wide range of contaminants. In the present study, a numerical model for a Yamuna–Krishni basin (1450 km²) is constructed using Visual MODFLOW to examined the efficacy of a PRB system through spatial and temporal changes in the quality of groundwater. A 5-year (1800 days) simulation is carried for chloride contaminant (Cl⁻) released from the contaminant source in the study area. Initially model is run without installation of PRB later than PRB was introduced. The activated wood charcoal (AWC) serve as a reactive medium in the PRB to decrease plume concentration within acceptable limit. The results show that emplacement of a PRB system has significant role in reducing concentration levels across all wells, when compared with non-PRB case. The maximum reduction in peak concentration reduction was about 30% in Shamli and Taprana. The lowest reduction in peak concentration (26.53%) was observed in Bhoora village among all the observation wells.</p>