What does the term "percolation test" refer to in septic system installation?

The term "percolation test" specifically refers to a procedure used to evaluate the capacity of the soil to absorb and filter water. This test is crucial in septic system installation as it determines how well the soil can handle effluent from the system. During the test, holes are dug in the proposed drain field area, and water is added to these holes. The rate at which the water seeps into the soil provides insight into the soil’s porosity and overall ability to manage wastewater. This information is vital when designing a septic system, as it impacts the size and type of system that can be installed, ensuring effective treatment and preventing system failure or contamination.