What is "backflow" in OSSF systems?

Backflow in OSSF systems refers to the unintended flow of wastewater back into the system, which can lead to contamination. In properly functioning systems, wastewater should flow in a specific direction—from the home to the treatment or holding tank and then onto the drain field for proper treatment and dispersion. However, if there is a disruption, such as a rise in pressure or a blockage, wastewater may reverse course. This backflow can contaminate clean water supplies or the surrounding environment, posing significant health risks. Various measures, such as backflow prevention devices, are implemented in OSSF systems to mitigate this risk and ensure that wastewater only flows in the intended direction. Understanding backflow is crucial for maintaining the integrity of sewage treatment systems and protecting public health.