A leach field is a crucial part of a septic system, designed to treat and disperse wastewater from a home. It consists of a series of trenches filled with gravel or sand, where effluent from the septic tank is released. The soil in the leach field helps filter and break down harmful bacteria and nutrients, allowing cleaner water to return to the groundwater. Proper maintenance of a leach field is essential for its effectiveness. Homeowners should avoid overloading the system with water and refrain from planting deep-rooted plants nearby, as these can damage the system. Regular inspections can help ensure the leach field functions efficiently and lasts longer.