Buying a home in Arnold involves a lot of paperwork, and water is easy to overlook until the first glass from the tap or the first shower. A pre-sale water check gives you facts before closing and gives you time to ask questions while you still have room to negotiate. This guide covers what to request, what to test yourself, and how to read the results.
Start by Finding Out Where the Water Comes From
Homes in Arnold generally fall into two groups. Some are on public water supplied by a utility that publishes a water quality report. Others draw from a private well. The source determines who is responsible for testing and what a seller should be able to show you. Ask the seller or listing agent directly, and check the disclosure documents for any mention of a well, a cistern, or a septic system on the property.
Public Water Homes: Read the Report First
Local public water reports describe tap water in the Arnold area as hard. They also commonly discuss chloramine as a disinfectant, disinfection byproducts such as TTHMs and HAA5, and chromium-6, which is a form of the metal chromium. A utility report is a starting point, not a verdict on one faucet inside one house. Ask whether the seller has a copy of the most recent report, or plan to pull it yourself from the utility. Then ask whether anything inside the home changes the water, such as a softener, a carbon filter, or a recent plumbing repair, because these can change what comes out of the tap.
Private Well Homes: Ask for Records and Plan a Full Test
If the home has a well, ask for any past lab results, the well construction record if one exists, and the dates of the last service on the pump and pressure tank. An older result is useful only if it covers the tests that matter. Many standard bacteria screens do not check for metals, nitrates, or naturally occurring minerals, so an old report may leave large gaps.
Common private well concerns in this area include iron and manganese, hydrogen sulfide with its rotten egg odor, sulfate, coliform and E. coli in shallow or older wells, seasonal nitrates linked to nearby septic systems or farm fields, and naturally occurring radium and radon. Each of these needs its own kind of test, so a single bacteria sample is not enough to base a sale on.
Lead Sampling for Wells in the South and West of Arnold
EPA is actively addressing lead and other heavy metals in private wells tied to the southwest Jefferson County mining Superfund area. If the property is a well in the south or west part of the community, lead belongs on the sample list. Ask whether lead has ever been tested, and if it has not, plan to include it. Lead is a metal that can reach water from the ground or from plumbing, and a lab can measure it in a properly collected sample. A test does not show where the metal came from, but it does show what the water contained at the time it was sampled.
What to Request During the Sale
- A copy of any existing lab report for the well or home water, with the date and the list of tests run.
- Service records for the pump, pressure tank, and any treatment equipment.
- Written notice of any boil water notices, well repairs, or contamination events the seller knows about.
- Permission to have a certified lab collect a sample during the inspection period.
Collecting Your Own Sample Before Closing
Ask the lab which kit matches the tests you want, and confirm who collects the sample, how it is packed, and how quickly it reaches the lab. Use the containers the lab provides, keep the sample cold as instructed, and write the date and time on the paperwork. Do not rely on a home test strip as the only evidence for a purchase decision. Strips can give a rough sense of hardness or chlorine, but they cannot identify lead, radon, or bacteria.
Reading Results Before You Decide
Lab reports list each test with a result and a reporting limit. Check the date, the sample location, and whether the water was drawn from a cold tap after sitting or after running. If a result exceeds a standard listed on the report, treat it as a reason to talk with a qualified water professional and to ask the seller for a repair commitment or a credit before closing. Keep copies of everything. A clear written record helps buyers, agents, and inspectors work from the same facts.
When to Bring in a Professional
If a test finds bacteria, lead, nitrates, radon, or a strong odor, pause the timeline and get a plan from a qualified person who works on wells or home water. Ask what they will test, what they recommend, and how they will confirm results after any repair or treatment. Keep the scope of work in writing before anyone starts.