Potential adverse health impact of chemical toxics substances such as Manganese in leachate is estimated particularly the influences to the population close to the landfill due to shallow well water consumption from the leachate movement. This study aimed to investigate potential health risk associated with exposure to Manganese (Mn) in landfill leachate to the community (worker, people surround the site, and children) who live close the Tamangapa Landfill site. Sampling survey of shallow well water was collected and taken to the laboratory to be analyzed. Ten sample stations with three replicates were made to analyze manganese contaminations in well water. Then, Health Risk Assessment (HRA) was applied by using the four stages of HRA; (1) Hazard Identification, (2) Dose response measurement (3) Exposure assessment and (4) Risk characterization to evaluate the potential risk posed by community surround the site. Results revealed the acceptable daily dose (ADD) and Hazard Quotient (HQ) for workers of manganese contaminated well water consumption of 3 liters/day were 0.0064mg/l/day and 0.64, for community surround landfill 0.0043mg/l/day and 0.43, then 1 liters/day water consumption for children were 0.0021mg/L/day and 0.21, respectively. Of those results, the hazard quotient (HQ) in toxicity assessment indicated that for 3 liters for adult and 1 liter for children of Manganese consumption in water indicated no risk.