What is the primary purpose of a drain field?

The primary purpose of a drain field, also known as a leach field, is to disperse treated effluent into the soil. In a septic system, wastewater flows from the septic tank to the drain field after the solids have settled and been partially digested by bacteria in the tank. The effluent, which has been treated to some extent, is then distributed through a network of perforated pipes laid within the drain field.

Once the effluent is in the drain field, it seeps into the surrounding soil, where it undergoes further treatment as it interacts with microorganisms present in the soil. This process helps to filter and purify the effluent before it reaches the groundwater or nearby bodies of water. This strategy helps minimize environmental impact and prevent contamination.

In contrast, options regarding the storage of wastewater, recycling water, or enhancing landscape design do not accurately reflect the primary function of a drain field. The drain field is not intended for storing wastewater, as its role is instead to facilitate the safe disposal and natural treatment of treated effluent.