A house on a well and septic system puts the buyer in charge of their own water supply and their own sewage treatment, and both need inspecting before purchase by specialists the general home inspector is not. The two systems also interact: a septic field too close to a well contaminates it. This checklist covers what to order, in what order, and what to collect, with the sewer camera as one item among many.
Quick answer: order a well flow test and water quality test, a well construction and records review, a septic inspection with a pump-out and drainfield evaluation, and a camera inspection of the drain lines from house to tank and tank to field. Confirm the well-to-septic setback meets the local rule. Collect the well log, the septic permit and as-built, the pumping records and any repair invoices. Price any deficiencies into the offer and leave time for the tests, which take days to return.
Well: quantity
A flow or yield test runs the well for a set period and measures sustained output and recovery. Low yield is a lifestyle constraint and sometimes a lender problem. Ask for the test to be done when the well has not been rested, and in the dry season if the schedule allows.
Well: quality
A laboratory test for bacteria, nitrates and whatever the local health department recommends for the area, which may include arsenic, radon, uranium or agricultural chemicals. Results take several days. Nitrates and bacteria in a well near a septic field point at the field.
Well: construction and records
The well log, if it exists, gives depth, casing, yield at drilling and date. Inspect the wellhead for a sealed cap, grade sloping away and no surface water entry. Note the pump age and the pressure tank condition. A well without a log is not disqualifying but is a question mark.
Septic: records
The permit and as-built drawing from the health department show the tank size, the field layout and the design flow, and whether the system matches the house’s bedroom count. Pumping records show maintenance. A system with no permit may be unpermitted or simply old; either way the inspector has less to go on.
Septic: tank inspection with pump-out
The inspector opens the tank, measures sludge and scum, checks the baffles and the tank structure, and pumps it so the walls and bottom can be seen and the field can be observed draining. An inspection without a pump-out is incomplete. The pump-out also empties the tank for the camera.
Septic: drainfield evaluation
The inspector probes the field, looks for surfacing effluent, lush growth and odour, checks the distribution box, and may run a hydraulic load test. A failing field is the most expensive item on this checklist and the one most worth finding before closing.
Camera: house to tank
A sewer camera from a cleanout or a pulled toilet to the tank inlet checks the one pipe that carries everything, and looks at the inlet baffle from inside. Roots, bellies, crushed sections and a missing baffle are the usual findings. The rural camera checks go into this in detail.
Camera: tank to field
With the tank pumped, the camera enters the outlet line to the distribution box and, where access allows, the field laterals. Standing water and roots here are field findings. Septic line inspection covers what the picture shows.
Camera: cross-connections and other drains
Every drain on the property is followed to its end: outbuildings, roof and footing drains, sumps, old lines. Clear water into the tank is the field’s enemy; an unmentioned cesspool is a liability.
Setbacks
Local rules set minimum distances between a well and a septic tank, field and any neighbouring systems, commonly fifty to a hundred feet or more. Confirm the actual distances from the as-built and from locating the tank and field. A well inside the setback from a field is a water quality risk and may be unpermittable to replace in place.
Documents to collect
Well log, flow test, water test, septic permit and as-built, inspection report, pump-out receipt, camera footage and report, any repair invoices, and the health department’s file on the property if it is available. Keep them together; every future inspector and the next buyer will want them.
Timing
Water tests take days; septic inspectors book out in spring. Order everything the day the contract is signed and ask for a contingency period long enough to receive the results and negotiate. See inspection contingencies.
Reading the results together
The items on this list are not independent. Bacteria or nitrates in the well water point at the septic field or at a neighbour’s; a field that fails the hydraulic test explains the lush green strip the inspector noticed; a camera finding of clear water entering the tank explains why the field is saturated. Read the well report, the septic report and the camera footage side by side and look for the story they tell together. A buyer who treats them as three separate pass or fail boxes misses the connection that matters, which is usually that one system is damaging the other. Ask the septic inspector and the well tester whether they have seen each other’s results, and if a finding in one changes the reading of another, get the specialist to say so in writing before the contingency runs out.
Common questions
Does a home inspection cover the well and septic?
No. Both need specialist inspections ordered separately.
Is a septic inspection without pumping acceptable?
It is incomplete. The tank walls, bottom and baffles cannot be seen full, and the field cannot be watched draining.
Why camera the septic line if the septic inspector is already there?
Because the inspector evaluates the tank and field, not the inside of the pipes. The camera finds the roots, bellies and cross-connections the inspector cannot.
Related guides
See cameras for septic systems, what drives septic camera costs, and seller disclosure.