What is the purpose of a leach field?

The purpose of a leach field is to distribute and absorb liquid waste into the soil. In a septic system, after wastewater is treated in the septic tank, the liquid effluent is released into the leach field. This field consists of a network of perforated pipes buried in trenches, allowing the effluent to seep into the surrounding soil. The soil acts as a natural filter, breaking down harmful bacteria and other contaminants, and facilitating the absorption of the treated water back into the groundwater system.

This process is crucial for ensuring the safe disposal of wastewater and protecting public health and the environment. It is essential for maintaining the system's functionality and preventing issues such as groundwater contamination. The other options presented do not reflect the specific function of a leach field as they focus on unrelated processes such as solid waste collection, air quality filtration, or water pressure regulation.