A drain field, also known as a leach field, is a crucial component of a septic system. It is designed to treat and disperse wastewater from a home or building. After the wastewater is filtered through a septic tank, it flows into the drain field, where it seeps into the ground. This process helps to naturally purify the water before it reaches the groundwater. The drain field consists of a series of trenches filled with gravel and perforated pipes. These pipes allow the treated wastewater to spread out and be absorbed by the soil. Proper maintenance of the drain field is essential to prevent clogs and ensure effective wastewater treatment.