A property without municipal water and sewer relies on a private well and a private septic system, and a lender's interest in both comes back to the same collateral question that runs through this whole course: would this property be easy to sell if the lender ever had to take it back? A home with contaminated water or a failing septic field is harder to sell, often needs disclosed remediation, and can lose value quickly in a buyer's eyes — so lenders commonly make satisfactory water and septic results a condition of financing rather than leaving it purely to the buyer's own inspection process.
A potability test checks the well water for bacterial contamination and, depending on the region, other markers of water quality; a septic inspection checks that the system is functioning and appropriately sized for the property. Both usually need to happen within the financing conditions period of a purchase, which is often tight — arranging these tests as early as possible, rather than waiting until other conditions are close to being satisfied, protects against a lab result or an inspector's schedule threatening the closing date.
Local health authorities are typically the ones who set the technical standards these tests are measured against, and requirements can vary meaningfully from one province, and sometimes one region, to another — confirm what's actually required locally rather than assuming a standard from a different market applies.
An unfavourable water or septic result is not automatically a dead deal, but it does need to be addressed directly rather than downplayed. Water quality issues are sometimes resolved with treatment systems; septic issues can range from a minor repair to a full system replacement, which is a materially different cost conversation. Whatever the fix, a lender will generally want to see the resolution documented — a clean re-test, a contractor's confirmation, a permit — before treating the condition as satisfied.
This is a case where getting ahead of the problem serves the client directly: a buyer who knows about a marginal well result before firming up an offer has real options — negotiate a credit, request a fix as a condition, or walk away — that disappear once the deal is unconditional.
For a client moving from an urban, municipally-serviced property to a rural one, well and septic conditions are often the single biggest unfamiliar item in the process. Explaining early that this is a normal, expected step — not a sign something is wrong with the property — helps the client plan for the timeline and cost rather than treating a requested test as an alarming surprise partway through the deal.
A rural purchase is moving through financing conditions and the well's potability test has not yet been booked, with the condition deadline five days away. What is the right response?
Potability and septic tests are commonly a genuine financing condition, and their timelines — lab turnaround, inspector scheduling — are outside anyone's direct control, which is exactly why leaving them until late in the conditions period is risky. A general home inspection does not substitute for a water potability test or a septic-specific inspection; assuming a pass is optimism, not risk management, and waiting for the lender to raise it wastes time that may already be scarce.
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