What does “permeability” mean in the context of septic systems?

In the context of septic systems, "permeability" refers to the ability of soil to absorb water or effluent. This characteristic is crucial because septic systems rely on the soil's capacity to effectively soak up and treat wastewater as it moves through the ground. High permeability indicates that the soil can quickly absorb and transmit fluid, which is essential for the proper functioning of a septic system. If the soil has low permeability, it can lead to issues such as pooling effluent on the surface or backflow into the system, potentially causing system failure and environmental contamination. Understanding soil permeability helps septic inspectors make informed decisions about site suitability and system design.