Septic inspection: what to know

What the job involves, what changes the price, and what to ask a pro.

What septic inspection is

A septic inspection reviews the tank, lids, baffles, pump chamber and drain field, and ends in a written assessment. It is often done for a home sale or for routine upkeep, and it tells you the condition of the system before a problem shows up as a backup.

Signs you need it

  • You are buying or selling a home and the lender, the buyer or the local rules ask for a current assessment
  • The system is older, the records are missing, or the previous owner cannot say when it was last pumped
  • The yard shows wet, green or soft areas over the drain field
  • Drains are slow, the toilets gurgle, or there are sewer smells near the tank or field
  • You want to know the tank and field condition before adding a bedroom or a larger household

What the pro does

  • Locate the tank, the lids and the distribution box, and open the access risers safely
  • Measure the liquid and scum levels, and check the inlet and outlet baffles
  • Check the pump chamber, the pump, the float switches and the alarm, and test them
  • Check the drain field for ponding, surfacing, soggy ground and the condition of the distribution lines
  • Check the tank for cracks, leaks and root intrusion, and the condition of the lids
  • Write the assessment with the findings, the photos, and the recommended next steps

What changes the price

Every job is different, so we do not publish prices. These are the things that move the quote up or down.

  • Number of tanks and pump chambers on the system
  • Access to the lids and the field, including buried or hard-to-find tanks
  • Whether the inspection includes a pumping, which changes the scope and the time
  • Whether a dye test or a field test is added to check the drain field
  • Written report format, and whether photos and a recommendation are included
  • Whether the inspection is for a sale, which may need a specific format for the buyer

What a written quote should spell out

  • Components inspected: tank, baffles, lids, pump chamber, pump, alarm and drain field
  • Levels measured in the tank, and whether pumping is included
  • Drain field observations, and any dye or field test done
  • Written assessment with findings, photos and recommended next steps
  • Format of the report, and whether it meets a buyer's or lender's requirement

Questions to ask before you hire

  • Will the report show the condition of the tank, the baffles, the pump and the field?
  • Can you tell whether the drain field is failing, and how you know?
  • Do you include photos and a written recommendation?
  • Does the local health department accept this report, or is a different format needed?
  • Do you pump the tank as part of the inspection, and is that extra?
  • If the report finds a problem, what are the repair options and their order?

Red flags

  • Pro who gives a report without opening the tank or checking the baffles
  • Pro who says the field is fine without checking the surface and the distribution box
  • Pro who pressures the seller or buyer to replace the system without showing the findings
  • Pro who will not provide a written report with photos

What you can do yourself

A homeowner can gather the system's records, locate the lids, and note the field's condition and any alarms. Do not open the tank or enter the pump chamber, since septic gas is dangerous. Call a licensed septic inspector for the assessment.

Licenses and permits

Septic inspection is commonly done by licensed or certified septic professionals, and the report format may be set by local rules or a lender or buyer. Check with your state or local licensing agency and the local health department for the requirements that apply to your system.

Septic inspection questions

How long does a septic inspection take?

It depends on the number of tanks, the access, and whether the report includes pumping. The pro should give you the time before the visit.

What does a failed septic inspection mean?

It means one or more parts are not working as they should, such as a cracked baffle, a failing pump, or a field that is ponding. The report should name the part and the next step, which may be a repair, a pump, or a replacement.

Can a septic inspection tell me how much life the field has left?

A visual and functional check can show signs of failure, but it cannot give an exact life span. The pro can tell you what the field shows today and what they would watch for.

Who should get a copy of the report?

The owner, and anyone who needs it for a sale, a loan, or the local health records. Ask the pro to confirm which copies they will send and to whom.

About this guide

This national guide is written and checked by infinibell. Rules and conditions differ by place, so local pros are credited on guides for the cities they serve, not on national ones.

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