What is evaluated in a percolation test?

The percolation test, often referred to as a "perc test," specifically measures the rate at which soil absorbs water. This rate is crucial in determining the suitability of the soil for a septic system. During the test, a series of holes are dug and filled with water to observe how quickly the water seeps into the surrounding soil. A slower absorption rate indicates that the soil may be too dense to support a septic system, while a faster rate suggests that the soil can adequately filter wastewater. This information is essential for sizing the septic system components, including the drain field and other aspects of the installation process.

While other options may touch on related aspects of septic systems and their impacts, only the rate of soil absorption is the direct focus of a percolation test, making it a critical factor in assessing soil suitability for wastewater treatment and disposal.