Why are percolation tests required?
Percolation tests are required under the authority of Chapter 216 of the Harford County Code entitled “Sewage Disposal Systems, Private”, Paragraph 21 which states: “Percolation tests are required to determine the absorptive capacity of the soil. All percolation tests shall be performed under the supervision of the Health Department on all lots where a private waste disposal system is required. Percolation tests will be conducted in the area as designated by the approving authority. Tests shall be made in sufficient number and at such locations to assure a reliable determination of subsurface conditions.
