Perk Test, Perc Test

The term, Perk Test or Perc Test, is a short form of the term "percolation test," which is a test to determine the suitability of a property location for a septic drainage system. A series of holes are drilled in which water is placed. The rate at which the water is absorbed into the surrounding soil is the percolation rate. This rate, along with an estimate of the daily rate of sewage flow will determine if the site is suitable for a septic system.

For additional details of how Perk Tests (Perc Tests) are done, see this article by the University of Minnisota Extension Service.