Which of the following is NOT a function of a septic system?

A septic system serves several critical functions in managing wastewater, but storing sewage indefinitely is not one of them.

The primary role of a septic system is to treat and manage household wastewater. One of its key functions is filtering out solids, meaning that it separates solid waste from liquid waste, allowing the liquid to flow to the next stage of treatment. Additionally, septic systems break down organic waste through biological processes. Bacteria in the tank decompose organic matter, making the effluent less harmful before it is released into the environment. Another essential component of a septic system is the distribution of effluent into drain fields. This ensures that the treated wastewater is dispersed and further filtered by the soil, allowing for natural purification processes.

In contrast, septic systems are designed for temporary storage of waste until it can be treated; they are not intended for indefinite storage. Over time, solid waste accumulates in the tank and requires regular pumping to remove build-up, ensuring the system functions properly. Therefore, storing sewage indefinitely contradicts the purpose of a septic system, as it must actively treat and manage waste rather than hold it permanently.