In relation to septic systems, what is the main purpose of the soil absorption field?

The main purpose of the soil absorption field in a septic system is to assist in biological treatment. This area, often referred to as a drain field or leach field, plays a crucial role in the final stage of wastewater treatment. After wastewater has gone through the septic tank, where solids settle and preliminary treatment occurs, the liquid effluent is distributed in the soil absorption field.

In this field, the effluent percolates through the soil layers, where microorganisms naturally present in the soil break down and treat the pathogens and organic matter. This process is vital for purifying the wastewater before it enters the groundwater. The soil’s physical and biochemical properties help facilitate this biological treatment, resulting in cleaner water that is less harmful to the environment.

This answer highlights the significance of biological treatment in the context of septic systems, specifically emphasizing the role of the soil absorption field in ensuring that harmful contaminants are adequately treated before the effluent disperses into the surrounding environment.