Percolation test

Measure of the absorption rate of soil

A percolation test is a test to determine the water absorption rate of soil in preparation for the building of a septic drain field or infiltration basin. The results of a percolation test are required to design a septic system properly. In its broadest terms, percolation testing observes how quickly a known volume of water dissipates into the subsoil of a drilled hole of known surface area. While every jurisdiction will have laws regarding the exact calculations for the length of line, depth of pit, etc., the testing procedures are the same.

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