Every generic Massachusetts closing-cost checklist says the same thing about septic systems: budget for a Title 5 inspection if you're not on town sewer, and you've covered your risk. That advice holds for plenty of towns. It falls short in Westford.
Roughly 40% of Westford properties draw their drinking water from a private well rather than town water, according to the town's own Board of Health data. That single fact changes the math on a sale here. A private well doesn't just mean a different water bill. It means a second inspection, tied directly to the septic report, that a lot of sellers don't find out about until their buyer's attorney asks for it.
Why Westford Splits Water From Wastewater
Westford was built out gradually, well before town sewer and water lines reached every street. The result is a patchwork: some neighborhoods sit on municipal water and sewer, others rely entirely on a private well for drinking water and a septic system for wastewater, and a meaningful number of homes mix the two, town water with a private septic system, or a private well feeding a house connected to sewer.
That patchwork is exactly why Westford's Board of Health doesn't treat the two systems as separate transactions. If your home has a well, the town wants to see it tested alongside the septic report, because a passing Title 5 doesn't tell anyone whether the water coming out of the tap is safe to drink.
The town's own septic systems page states this directly:
Please note, if you have a Title 5 Inspection Report conducted, a well test must accompany it.
That single sentence, easy to miss on a municipal page, is the detail that turns a routine sale into a two-track process for a large share of Westford's housing stock.
What Each Test Actually Checks
The two inspections aren't interchangeable, and they don't run on the same clock. Here's how they break down:
| Title 5 Septic Inspection | Private Well Water Test | |
|---|---|---|
| What it checks | Whether the septic system protects public health and the environment in its current condition | Whether the well water is safe for human consumption |
| Who orders it | A DEP-licensed system inspector | Typically the seller or buyer, coordinated through the same visit or a separate lab test |
| Required window | Within 2 years before a sale, or within 6 months after if weather prevents testing | Paired with the Title 5 report per Westford's local requirement |
| Validity | 2 years, or 3 years if the system is pumped annually with documentation | Not standardized statewide; Westford ties it to the septic inspection cycle |
| Added paperwork | Inspector must supply the Board of Health with water use records covering the past 2 years | Lab results submitted alongside the septic report |
The Massachusetts Title 5 statute sets the septic side of this timeline for every town in the state. What's specific to Westford is the requirement that pulls the well test into the same window, and the added step of supplying two years of water use records to the Board of Health before the inspection is considered complete.
Where This Catches Buyers And Sellers
The most common surprise isn't the requirement itself. It's the sequencing. Sellers who've owned their home for years often haven't thought about their well since the day it was drilled. They schedule a Title 5 inspector, assume that's the whole job, and then learn mid-contract that a water test and lab turnaround still need to happen before the file is complete.
Buyers financing with a mortgage add another layer. Many lenders will not clear a loan on a home with a private well until they see a passing water potability test, separate from whatever the town requires for the sale itself. That means a well test isn't just a local compliance step. It can sit on the critical path for the buyer's financing too, which is exactly the kind of detail that stalls a closing date if nobody flagged it in week one.
Relocation buyers, who make up a real share of Westford's market given its commuter rail access and school-driven appeal, are the group most likely to have never owned a well or septic system at all. For them, "you'll need a Title 5" sounds like a single line item. Finding out it comes with a second test, a second vendor, and a second lab result is often the first moment the transaction feels unfamiliar.
The Sequence That Keeps A Sale On Schedule
For a Westford home on a private well and septic system, the cleanest path through a sale generally looks like this:
- Confirm whether the property is on private well, private septic, or both, since a portion of Westford homes only have one of the two.
- Schedule a licensed Title 5 inspector early, ideally before listing, so the report is in hand rather than pending during buyer negotiations.
- Pull together pumping records for the past two to three years. A documented annual pumping history extends the inspection's validity from two years to three, which matters if there's any gap between inspection and closing.
- Order the well water test at the same time as the septic inspection rather than after an offer is accepted. Lab turnaround adds days that a tight closing calendar may not have.
- Submit the water use records covering the past two years to the Board of Health, since Westford requires this alongside the inspection itself.
- Share results with the buyer's lender early if the buyer is financing, so a private well doesn't become a late-stage underwriting surprise.
Skipping straight to step 2 and hoping the rest sorts itself out is the version that costs sellers time.
What This Means For Your Timeline And Price
As of March 2026, Westford's median sale price sat around $832,000, with homes generally selling in the $819,000 to $862,000 range and moving in roughly 22 to 27 days on market with multiple offers common. That pace isn't unusual for Westford. It's also not a lot of runway.
A home that sells in three to four weeks doesn't have slack built in for a well test that gets ordered after the offer is accepted, or a Title 5 report that's still pending when a buyer's attorney asks for it at the purchase and sale stage. In a market moving this quickly, the sellers who front-load their well and septic paperwork are the ones who keep their negotiating position intact. The sellers who don't often end up trading price or terms for time once a buyer's financing contingency runs into a testing delay nobody planned for.
Frequently Asked Questions
Does this apply if I'm on town water but have a private septic system? Yes, for the septic side. The well test requirement specifically applies to properties with a private well. If you're on town water with a private septic system, you'll need the Title 5 inspection but not the paired well test.
What happens if the well test comes back with an issue? Depending on what the lab finds, this can range from a simple treatment fix, like adding a filtration system, to a more involved remediation. Either way, it becomes part of the negotiation, similar to how a failed Title 5 typically leads to a repair credit or a price adjustment rather than killing the deal outright.
How long is a passing Title 5 report good for? Two years from the inspection date. If the system has documented pumping every year on or before the inspection's anniversary, that window extends to three years.
Who typically pays for the well test? There's no fixed rule. It's negotiated the same way septic inspection costs often are, and in many Westford transactions it ends up as a seller expense since the seller is the one certifying the property's systems at the point of sale.
Selling a home on a well and septic system in Westford isn't harder than selling anywhere else in Massachusetts. It just runs on a slightly different clock, and the sellers who know that going in are the ones who keep their timeline instead of losing it to a lab report nobody scheduled in time.
If you're weighing a sale in Westford and want a clear read on what your specific property will need before it hits the market, Laura Rakauskas has spent years walking Westford sellers through exactly this kind of local detail. Let's Connect.
