Green Plumbing

Answer: A - The percolation test, or perc test, measures the rate at which water permeates wet soil. The outcome is expressed as the percolation rate, or how many minutes it takes for the water to fall one inch. The soil is soaked prior to the test to reflect worst-case rainfall conditions. A successful outcome, or plan for remedying issues related to poor perc test results, is generally required prior to installation of a septic system.