When Is a Water Sample Test Recommended?

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4. When Is a Water Sample Test Recommended?

Which DFW homes are on a private well

Most homes inside the Dallas-Fort Worth Metroplex are on a municipal or utility district water supply that is treated and tested by the provider. Once you get out to acreage properties and rural subdivisions in the outer parts of Tarrant, Denton, Collin, Ellis and Johnson counties, private wells become common. If the property has a well house, a pressure tank in a shed or garage, or no water bill, the home is probably on a well.

A private well is the owner’s responsibility. Nobody tests the water unless the owner does, and a seller who has lived there for years may never have had it checked. That is the gap the water sample test fills. It is why our booking form lists the Water Sample Test as recommended for wells rather than as a general add-on.

Homes on a shared well, or on a small community system that serves a handful of houses, fall into the same category. Ask the seller or your agent where the water comes from before you book, and if the answer is anything other than a city or utility, plan on well water testing with your home inspection.

What a water sample test is for

The test answers one question: is the water coming out of the taps safe and reasonable to use? A sample of the home’s water is collected and sent to a laboratory, which analyzes it and returns a written report. Labs commonly screen well water for bacteria, nitrates and a range of minerals and other substances, and the report shows each result alongside the level the lab treats as acceptable.

The home inspection itself cannot answer that question. A TREC inspection is visual and non-invasive and does not include laboratory testing of any kind. Our inspectors will look at the visible well equipment, the pressure tank, the piping and the fixtures as part of the plumbing inspection, and they will run water and check flow and pressure at the taps, but clear, good-tasting water can still carry bacteria or nitrates. Only a lab can tell you.

When the water sample test is recommended

The simplest rule is that any home on a private well should have its water tested as part of the purchase. Beyond that, a few situations make it especially important.

• The home is served by a private or shared well rather than a city or utility supply
• Your lender has told you a water test is a condition of the loan, which is common for well-served homes on some loan programs
• There is a septic system, livestock, a barn or agricultural land near the well
• The seller cannot produce a recent lab report for the well
• The water has an odor, a taste, or leaves staining on fixtures and laundry
• The house has been vacant for a long period, which lets bacteria build up in the well and lines
• The well is old, shallow, or has a casing or cap that appears damaged during the inspection
• You have infants, elderly family members or anyone with a health condition moving in

Even if none of those apply, the test is inexpensive relative to what it protects, and it gives you a baseline result from the day you bought the house. Well owners are generally advised to retest periodically, and the purchase test is the first entry in that record.

How the sample is collected and analyzed

The water sample test is arranged through the booking form and handled during your inspection appointment. Here is how it works in general terms.

1. Add the test when you book. Select Water Sample Test on the booking form. It is listed at $200 and noted as recommended for wells.
2. The sample is collected at the property. Water is drawn from the home’s supply into laboratory sample containers following the lab’s collection instructions.
3. The sample goes to the laboratory. The lab analyzes it and produces a written report of the results.
4. You receive the results. The lab report is separate from your same-day home inspection report and arrives on the laboratory’s schedule.
5. Act on the findings. If a result is out of range, a water treatment professional or well contractor can recommend disinfection, filtration or well repair, and you can negotiate accordingly.

Because lab turnaround is outside our control, add the test as early in the option period as you can so the results are back before your decision deadline.

Why lenders and buyers ask for it

Lenders care because a home with an unsafe water supply is a riskier asset and, in some loan programs, an ineligible one until the water is treated. Government-backed loan programs in particular may require a passing water test on a well-served property before closing, and the lender will tell you exactly which contaminants must be reported. If your lender asks for a test, share their requirements when you book so the right analysis is ordered.

Buyers care for more practical reasons. Water is the one thing in a house you drink, and a well that needs treatment changes your monthly costs and your maintenance list. The test also tells you something about the well itself. Bacteria in the sample can point to a cracked casing, a bad cap or surface water getting in, and a well contractor can fix those problems. Nitrates can point to nearby agricultural or septic influence that treatment can address but not eliminate.

What the water sample test does not cover

The test evaluates the water. It does not evaluate the well as a piece of equipment, and it does not replace the parts of the home inspection that look at the plumbing. It helps to be clear on the boundaries.

A well yield or flow test, which measures how much water the well can deliver over time, is a separate service from a well contractor and is worth considering on acreage where the well supplies a house, a barn and irrigation. The full list of things a home inspector does not do is on what home inspectors cannot do.

Adding the water sample test to your inspection

The water sample test sits on the booking form alongside the other add-ons: pool inspection, termite inspection, sprinkler inspection, foundation level measurement and sewer scope. Select the ones that fit the property, and the total for the visit is confirmed before the appointment.

The base inspection fee is not published because it depends on the home’s square footage, age and add-ons. For a number for your address, use the Get a Quote form or call (817) 842-0330. The page on home inspection cost in DFW explains what moves the price and why the add-ons are priced separately.

Every inspection, well-served or not, includes complimentary thermal imaging, a same-day web-based report with photos, and an in-person walkthrough at the property with your inspector. If you cannot attend, the inspector reviews the report with you by phone. When the lab results come back, you will have both documents to make your decision with.

Frequently asked questions