Septic System and Well: What the Seller's Declaration Leaves Out

For a Quebec home connected to neither municipal water nor sewer, the seller's declaration is the first document a buyer reads about the septic system and the well. It is also a document that records what the seller knows, and nothing more. This article measures the gap between what the form asks and what you need to know, and identifies the documents that close it. The technical checks themselves are covered in our article on septic tanks and wells before buying a rural home, and the form in our guide to the OACIQ seller's disclosure statement.

What the seller's declaration asks about water and wastewater

The form asks the seller how the property gets its water and how its wastewater is disposed of: through municipal networks or through private systems. It asks about problems they know of and work that has been done, as it does for the rest of the house.

The answers have real value: a seller who knows of a past backup, water once found unfit to drink, or a rebuilt leaching field must declare it. They also have a precise limit: they cover what the seller knows, not what has been measured.

What it does not ask

Several pieces of information that matter most to a buyer do not come from the form. They exist elsewhere, or do not exist at all, and they have to be looked for:

• whether the septic system was built under a municipal permit, and to what standards;
• its capacity relative to the number of bedrooms in the house;
• when the tank was last pumped;
• the depth, type and flow of the well when it was drilled;
• the results of water tests done over the years.

None of this depends on the seller's good faith. These are documented facts, or facts nobody documented: either way, the declaration does not replace them.

A "no" or an "I don't know" does not close the question

An owner who bought the house a few years ago may honestly not know how old the septic system is or when the well was drilled. They will answer that they do not know, or that they know of no problem, and that answer will be accurate.

For the buyer, that answer is not a guarantee; it is an absence of information. It does not say the system complies, only that the seller is not aware otherwise. The question stays open, and the documents are what close it.

Septic system: the permit, the design, the pumping

Building or modifying a septic system requires a municipal permit, issued on the basis of design documents. Ask the seller for the permit and, where they exist, the plans or report from the professional who designed the system. These documents show what type of system was authorized, for what capacity and on what date.

The tank must be pumped at a frequency set by the provincial regulation. Pumping records, invoices or statements, show whether that frequency was respected. In some municipalities, pumping is organized by the city or the regional county municipality, which keeps the records.

The absence of a permit does not on its own prove non-compliance: an older system may predate current requirements. But it means no document says what was installed, and that is exactly what the evaluation of the system will have to establish.

Well: the drilling report and the history of water tests

When a well is drilled, the driller produces a drilling report. It shows in particular the depth, the type of well and the flow measured at the time of the work. Ask the seller for it; if they do not have it, reports filed with the ministry may, depending on when the well was drilled, be found in provincial records.

Past water tests complete the picture. A history of results shows whether the water has caused problems before and whether a treatment system was installed in response. A single old test says nothing about today's water, but it does say what to watch for.

What the municipality can provide

The municipality's planning department can tell you which permits were issued for the septic system and the well at that address, and sometimes provide copies of the documents filed. Where pumping is municipal or regional, it can also confirm the date of the last one.

The request needs the address and, depending on the municipality, the owner's consent or a formal request. It takes time: start it as soon as the promise to purchase is accepted.

When a document is missing

A missing document is not a reason to walk away; it is information to build into the offer. The promise to purchase can include a condition covering an evaluation of the septic system, a water test and the well's flow, with a deadline that allows for the steps with the municipality.

What those checks reveal is then used to decide: accept the house as it is, negotiate based on a quote, or withdraw within the agreed deadline. The seller's declaration opened the question; the documents and the checks answer it.