Definition of term
A perc test or percolation test is a way to determine soil suitability for on-site sewage disposal (septic). It involves percolating (or soaking) a small amount of water into the ground and measuring its draining rate. A perc test can give you important information about how well your soil will absorb and filter sewage effluent. This information can help you make important decisions about your septic system, such as the type of system you need and where to locate the system.