This book is a ready reckoner of recent information regarding the impact of leachate landfills, leachate treatment, and heavy metals on a single platform. The amount of waste is constantly growing due to population growth and the evolution of socioeconomic activities. Burying this waste produces leachate, a contaminated effluent created during the decomposition of organic waste and containing harmful substances like heavy metals, polyphenols, volatile organic compounds, and microorganisms. These effluents emit unpleasant odors associated with ammonium ions. These discharges significantly impact the environment. As a result, the masters and doctoral academics, researchers, and students will be able to comprehend the most recent developments in municipal solid waste landfill operations, supporting their research. This book inspires readers on how to deal with environmental pollution problems due to leachate contamination in freshwater and agricultural soils using a variety of technologies.