A home listing can tell you the number of bedrooms and the age of the roof. It rarely provides a clear history of the water supply, plumbing repairs, treatment equipment, or unresolved leaks. Buyers often have to ask for those details.
The distinction between an estimate and a direct measurement matters. On September 22, 2026, NPR reported that consumer fitness wearables were generally inaccurate when calculating calories burned. That story concerned smartwatches, not drinking water, but it illustrates a useful principle: a broad estimate should not be mistaken for information measured at the point you care about.
For a homebuyer, a utility report describes the public water system. It does not necessarily describe water after it has traveled through the service line, household plumbing, water heater, filters, and individual fixtures. Use the following request sheet to gather both kinds of information without confusing them.
1. Identify the water source
Ask the seller or listing agent to identify the source as a public utility, a shared system, or a private well. Record the utility or system name, account contact information, and any known secondary source, such as a cistern.
For public water, request the utility's latest available consumer confidence or water quality report. Also check whether the address has received notices about service line materials, construction, flushing, pressure changes, or other system work. These are public or system-level records. Keep them in a folder labeled accordingly.
For a private well, request available well construction, permit, repair, disinfection, and testing records. Note the date and scope of each test rather than accepting a statement that the water was simply checked.
2. Request the home's plumbing history
Ask for invoices, permits, warranties, and disclosures related to supply pipes, the service line, sewer or septic connections, the water heater, pressure equipment, sump systems, and major fixture replacements. Useful entries include the date, contractor, affected area, materials installed, and reason for the work.
Also request records for leaks, frozen pipes, backups, repeated clogs, low pressure, unusual odors, staining, or water damage. A repair receipt does not automatically show that the underlying cause was resolved, so note any promised follow-up.
3. Document treatment equipment
If the house has a softener, filter, reverse osmosis unit, ultraviolet device, neutralizer, or other treatment system, ask for the model number, installation date, operating instructions, maintenance schedule, and service history. Record when cartridges, lamps, media, membranes, or salt were last replaced.
Do not assume equipment is necessary, effective, or currently working because it is installed. Ask what concern it was intended to address and whether there is testing from before and after installation.
4. Keep testing in a separate column
Create two headings on your request sheet: Public Reports and Home-Specific Results. Under the first, list utility reports and system notices. Under the second, list samples collected from the property, including the collection date, location, laboratory, substances tested, and result.
If no home-specific results exist, write that down. A home inspector can help identify visible plumbing conditions and appropriate follow-up, but a standard inspection may not include laboratory water analysis. Ask exactly what is and is not included before the inspection date.
5. Make an inspection follow-up list
Turn every incomplete answer into a specific task. Examples include locating a missing permit, identifying an unmarked treatment unit, confirming the service line material, evaluating evidence of an old leak, or arranging suitable water testing. Assign each task to the buyer, seller, inspector, utility, laboratory, or another qualified provider, with a due date before the relevant contract deadline.
Keep unrelated health information outside this property file. Even a useful resource about a Spravato clinic in St. Charles County concerns personal care planning, not evidence about a home's water supply. Separating records by purpose makes it easier to see what information is still missing.
Printable request sheet
Property address: ________
Water source and provider: ________
Latest public water report received: Yes / No
System or service notices received: Yes / No
Well records received, if applicable: Yes / No / Not applicable
Service line material documented: Yes / No
Plumbing repair invoices received: Yes / No
Leak or backup history disclosed: Yes / No
Treatment equipment identified: Yes / No
Maintenance records received: Yes / No
Home-specific test results received: Yes / No
Inspection exclusions reviewed: Yes / No
Follow-up tasks, owner, and deadline: ________
This checklist cannot guarantee water quality or predict future repairs. It can give buyers a more orderly record of what is known, what applies only to the wider water system, and what still needs to be checked at the house.