The municipal solid waste per capita is almost 200 gm/day in West Bengal (2020–21). But only a few grams of waste per capita are carried to the final disposal site, whereas the rest is disposed of locally. Solid garbage, including plastic, causes severe damage if not disposed of properly. Improper treatment and management of small industries, hospitals, and domestic waste may pose a threat to the local environment and society. In the past few decades, solid waste, especially plastic, has become a real threat to the environment and ecosystem globally. To minimize such an impact, the related authorities have taken various measures, including banning plastic use, but still, it is in alarming quantity. Therefore, we have to rethink its management and proper disposal. In Memari town, the existing two sites of municipal disposal have both health and environmental issues. Therefore, finding a new, suitable location for the solid waste disposal site is an urgent need. Based on the Multi-Criteria Decision Analysis (MCDA) in the Geographical Information System application with ground validation, six suitable sites are identified from almost 37% of the suitable area, which is found in the total study area. These six sites are proposed for dumping solid waste due to their minimum impact on the surrounding environment.