This study examines leachate’s physical and chemical characteristics from urban landfills and its ability to pollute groundwater sources. Improper waste separation practices create waste materials that decompose anaerobically and produce leachate. Leachate carries toxic elements that can pollute nearby natural water sources. The study examines the characteristics of the leachate using the leachate pollution index (LPI). However, the LPI is a powerful environmental tool for measuring pollutant concentration within the leachate and can detect the extent of pollution caused. Samples were collected from a landfill in Vilholi, Nashik (MH), India, during the pre-monsoon and post-monsoon seasons. Through SEM & EDAX analysis, the presence of heavy metals such as Lead, Zinc, Titanium, Cadmium, and Mercury were tested, and around 13 physicochemical parameters were measured for the analysis. The study summarizes the risk of groundwater contamination and suggests ways to prevent contamination in the landfill by studying the presence of heavy metals in the leachate. The analysis shows that the LPI range of the leachate sample is between 25 and 30, indicating that the sample is still under stabilization process and has a higher chance of sub-surface water pollution. The study recommends remedial measures to mitigate the impact of leachate percolation and dispersion.