What is a drain-field primarily considered to be?

A drain-field is primarily considered a treatment and dispersal component of a septic system. Its main function is to receive effluent from the septic tank, allowing it to undergo further treatment as it percolates through soil layers. This process also disperses the effluent, allowing it to be absorbed into the surrounding soil.

The effluent is treated biologically by soil microorganisms that break down harmful pathogens and contaminants present in the wastewater, thereby reducing pollution and protecting groundwater resources. In this context, the drain-field plays a crucial role in ensuring that treated effluent is safely released into the environment.

The characterization of a drain-field as simply a treatment component overlooks its vital role in dispersing the treated effluent into the soil, which is equally important for preventing groundwater contamination. Therefore, it fulfills a dual function that is integral to the effectiveness and safety of a septic system.