Our date to date life groundwater is one of the important natural resource. In this paper, intends to evaluate the groundwater quality for drinking water purpose in Dhanbad district. In this study area, the important coal deposits occur in Jharia and Nirsha blocks. It is play a vital role for groundwater contamination in this district. The groundwater analysis data collected from Central Groundwater Board, Calcutta and Central Mine Environment, ISM Dhanbad. These data were used to evaluate spatial distribution of groundwater quality to fit for drinking purpose. In this study, IS: 10,500 drinking water standard was used and what are the parameters exceed permissible limit taken into account for analysis. Assessment of quality has been carried out with the help of various parameters and using overlay analysis in GIS. The study concealed that while the 4.33% area have excellent quality, 74.12% area identified as good quality and 21.08% and 0.47% area comes under moderate and poor categories respectively.