Moving into a home in St. Louis means taking on a water system you may know very little about. Most of what you need to learn fits into a first month of records requests, simple checks around the house, and a notebook. You do not need to buy equipment until you know what your water is doing.
Start with the source
The first question is where the water comes from. Most addresses in the City of St. Louis and the inner suburbs are served by a public water system. That means a utility bills you and publishes an annual water quality report. Some homes in the wider St. Louis area, especially in outlying parts of the county, draw from a private well. The two situations call for different first steps, so confirm which one applies before anything else.
Ask the seller, the listing agent, or the previous owner's records. Public systems keep account history under the address. Private wells often have a well log, a pump installation record, or an older test report. If none of those exist, plan to test the well early.
Gather the records you can get
- Ask for the past year of water bills to see typical usage and any sudden jumps.
- Request the most recent water quality report from the utility, or note that you need it for a well.
- Ask whether the service line from the street to the home has been identified as to material. Records, a check at the meter, or an inspection by a licensed plumber can help answer this.
- Ask for any past water test results, treatment equipment manuals, and service invoices.
Find the shutoffs and the meter
Before you use the house much, locate the main shutoff valve and the water meter. Write down where each one is and check that the main valve turns. Note whether the meter sits inside the basement, in a crawl space, or in a box near the curb. You will need this location for leaks, repairs, and any future work.
Walk the house and watch the taps
Run each faucet, tub, and shower for a few minutes. Look at the water in a clear glass. Note color, clarity, and smell, and check whether the water sounds or behaves differently when you run more than one fixture at once. A rotten egg smell from the hot tap, a metallic taste, or brownish water after the house sits idle are clues worth recording.
Look at the fixtures too. White crusting on faucet aerators, chalky rings in tubs, spotted glassware, and soap that does not lather well are common signs that the water carries dissolved minerals. In many St. Louis homes these signs are the first thing people notice. They are clues, not measurements. A lab or a home test kit gives you measured results.
Order the right tests
For a public water supply, start with the utility's report, which already lists the results for the regulated substances the system must monitor. Test yourself for items the report does not cover, such as hardness, iron, or copper at the tap, because plumbing inside the home can change what comes out of the faucet.
For a private well, test through a certified laboratory. A typical panel covers bacteria, nitrate, iron, manganese, hardness, and pH, and you can add lead if the plumbing or service line is a concern. Collect samples as the lab instructs and keep the chain of custody paperwork. A home kit can screen for some items, but it is not a substitute for a lab report when you need a record.
For any water sample, the timing matters. Test after the water has been sitting in the pipes for several hours, and separately from a first draw of the day if you are checking for plumbing sources. Follow the lab's instructions exactly.
A four-week plan
- Week one: Confirm the water source, request records, and locate the shutoff and meter.
- Week two: Walk the house, run every fixture, and write down what you see, taste, and smell.
- Week three: Order any lab tests the source requires, and collect samples on the lab's schedule.
- Week four: Review the results against the utility report or lab sheet, then decide whether a professional assessment is needed.
Decide with your results in hand
By the end of the month you should have a source identified, a folder of records, a list of fixture clues, and at least one set of measured results. That is enough to talk sensibly with anyone who offers to assess or repair your water system. Ask for a written assessment that cites your test results, and compare it with your own notes before agreeing to any equipment or work.
Keep the notebook after the first month. Water conditions change with seasons, plumbing ages, and treatment equipment needs routine care. A dated log of what you saw and what you tested will help you, and anyone you hire later, understand your St. Louis home's water over time.