A septic inspection is one of the most important steps when buying or selling a home that isn't connected to public sewer. Here is what a thorough inspection covers and how to prepare.
1. Locating the system
The inspector starts by confirming where the tank, distribution box and drainfield are. County permit records and site sketches help, but the components are always verified in the field.
2. Septic tank evaluation
The tank is opened and checked for sludge and scum levels, cracks, and root intrusion. The inlet and outlet baffles are confirmed present and rated: Satisfactory, Satisfactory with Concerns, Unsatisfactory, or Needs Further Evaluation.
3. Distribution box
When a distribution box is present, it is either excavated or video inspected to make sure effluent is spreading evenly to every line.
4. Drainfield performance
The inspector looks for surfacing effluent, soggy ground, unusually green grass and odors — the common warning signs of a failing drainfield.
5. Hydraulic load test
Many states call for running water through the system to watch how it handles a normal household load.
How to prepare
- Find any past pumping receipts and permits.
- Clear access to tank lids.
- Avoid heavy water use for a day before the inspection.
A clear, photo-documented report gives buyers, sellers and agents confidence in the property — and helps catch small problems before they become expensive repairs.