What is leachate?

Leachate is defined as the liquid that drains or seeps from a landfill. This liquid is produced when water filters through the waste materials and collects various dissolved and suspended substances. These substances can include organic and inorganic chemicals that may contaminate the surrounding soil and groundwater if not properly managed. The composition of leachate can vary depending on the types of waste in the landfill and the environmental conditions, such as rainfall and temperature.

Understanding leachate is critical for waste management and environmental protection because it poses significant risks to the environment and public health if released untreated. Containing and treating leachate is a fundamental aspect of landfill design and operation to prevent soil and water contamination.