What does the percolation coefficient measure?

The percolation coefficient specifically measures how quickly water can travel through soil. In the context of septic systems, it is a critical factor used to evaluate the suitability of soil for absorption and the installation of drain fields. The ratio of trench bottom area to percolation time provides valuable insight into how well the soil can absorb wastewater, allowing designers to determine the appropriate size of the drain field based on the soil's ability to handle effluent.

By assessing the percolation coefficient, septic system installers can ensure proper water flow and prevent issues such as flooding or system failure, which can occur if the soil cannot adequately treat the effluent before it reaches the groundwater. This makes understanding the percolation coefficient essential for effective septic system design and functionality.