# Well Inspection Before Buying a House: A Buyer's Scope Sheet

Source: https://brictale.com/water/wells/well-inspection-before-buying-a-house
Published: 2026-08-23
Audience: Homeowner
Published by Brictale, a consumer home-intelligence publication. https://brictale.com

## Short answer

A complete pre-purchase well review separates five jobs: records and unused-well research, a qualified well-and-pump inspection, a witnessed current flow or recovery record, certified-laboratory water testing, and separate plumbing, electrical, and septic review. Put the sample location, test panel, measurements, exclusions, and unresolved risks in writing. Do not treat an old well-log yield or one clean sample as proof of current capacity or a safe, functioning household water system.

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# Well Inspection Before Buying a House: A Buyer's Scope Sheet

A complete pre-purchase well review is not one appointment called “the well inspection.” Put five workstreams in the purchase file:

1. identify every well and retrieve records, including unused or sealed wells;
2. have a qualified well professional inspect the well and pressure system;
3. witness a documented current flow or recovery observation;
4. order water testing through a state-certified drinking-water laboratory; and
5. assign household plumbing, electrical-code, septic, and lender questions to the right separate reviewer.

That separation matters. A clean water sample does not show that the pump can meet household demand. A pump that produces water does not prove the water is safe to drink. An old well-log yield is a historical observation, not a current capacity guarantee. And a standard home inspection may leave the well outside its contracted scope. Wisconsin’s property-transfer guidance, for example, treats well and pressure-system inspection, water testing, and a search for unused wells as distinct parts of the buyer’s decision; it also warns that a home inspector may not have the license required to evaluate a private well there. [Wisconsin DNR’s transfer guidance](https://dnr.wisconsin.gov/topic/Wells/RETransfer.html) is a useful model for the questions to ask, not a national rule.

Your deliverable should be a dated evidence packet that says what was inspected, who did it, where each water sample came from, what was measured, what was not accessible, which rules apply, and what remains unresolved before the contingency or closing deadline.

## 1. Decide what the buyer must know before the deadline

Use the inspection to answer decision questions, not to collect a vague “good” or “bad” label. The following table is the minimum scope for a private domestic well. The person named in the third column is the owner of that question; one person may coordinate the packet, but should not silently substitute for another professional’s role.

| Buyer question | Evidence to request | Appropriate owner | What it does not prove |
|---|---|---|---|
| How many wells are on the parcel? | Well map, state or county records, seller disclosure, field search, and status of each well | Buyer, seller, local/state well authority, qualified well professional | A missing public record proves there is no second or old well |
| Is the active well physically identifiable and accessible? | Location, photos or field notes, visible casing/cap/seal, drainage, flood exposure, and access limitations | Qualified well professional | Buried construction details or underground defects |
| Does the water system operate now? | Pump and pressure-system observations, gauge readings, cycling behavior, and a dated flow/recovery record | Qualified well or pump professional | Future pump life, drought resilience, or guaranteed household supply |
| Is the water suitable for the intended use? | Laboratory report with sample location, analytes, units, detection limits, and comparison basis | State-certified laboratory; health department for interpretation | A result from one tap or one day proves every part of the home’s plumbing is safe |
| What equipment will the buyer inherit? | Pump, pressure tank, controls, treatment devices, filters, service history, manuals, and replacement needs | Well/pump professional plus seller records | That an unlabeled softener or filter removes a contaminant |
| What is outside this scope? | Written exclusions for plumbing distribution, electrical code, septic, buried casing, inaccessible equipment, and treatment performance | Contracting parties and each engaged professional | Silence means an item was inspected |

Before booking anyone, read the purchase contract, inspection contingency, lender conditions, seller disclosures, and any county or state transfer instructions. EPA says private-well regulation is limited or absent in many states and maintains a state-program directory, so there is no single US transfer checklist that overrides local requirements. [EPA’s state-program overview](https://www.epa.gov/privatewells/private-drinking-water-well-programs-your-state) supports the practical rule: verify the property’s state and local requirements first, then add the lender’s written conditions.

Ask the lender whether it needs a current well inspection, a specific flow or yield test, a water panel, proof of potability, an unused-well closure record, or a particular professional’s license. Ask whether the result must be delivered directly to underwriting and whether a failed result changes the loan condition. Do this before the inspection window closes; a report delivered after the deadline may be informative but commercially useless.

## 2. Assign each task to the right qualified person

“Qualified” is not one universal title. In one state it may mean a licensed water-well driller or licensed pump installer; elsewhere the applicable credential, registration, or transfer form may differ. Ask the state well authority how to verify the person’s standing and whether the person may make a compensated statement about well capacity, performance, construction, or compliance at a property transfer.

Wisconsin says that, for its property-transfer statements about a well and pressure system, the person must be a licensed water-well driller or licensed pump installer. Texas buyer guidance likewise strongly recommends a licensed water-well driller or pump installer for the professional inspection and says that most lenders require a well inspection before purchase. Those statements are state-specific examples, not a national licensing rule. [Wisconsin DNR](https://dnr.wisconsin.gov/topic/Wells/RETransfer.html) and the [Texas Groundwater Protection Committee FAQ](https://tgpc.texas.gov/POE/FAQs/BuyingPropertywithPrivateWaterWell_FAQ.pdf) show why the credential should be confirmed against the property’s jurisdiction.

Use this handoff map:

- A well driller or pump installer: well location and construction records, visible wellhead, pump and pressure system, current performance observations, accessible treatment equipment, and the limits of any flow or recovery test.
- A state-certified drinking-water laboratory: analysis of collected samples, chain-of-custody or sample-receipt details if used, analytes, methods, units, detection limits, and the laboratory’s reporting basis.
- A local or state health or environmental department: advice about contaminants of concern, local ordinances, interpretation of a positive result, and whether additional sampling is appropriate. CDC says the local department can help select additional tests based on where the well is located and what is nearby. [CDC’s well-testing guidance](https://www.cdc.gov/drinking-water/safety/guidelines-for-testing-well-water.html) is the health-safety baseline.
- A licensed electrician: electrical safety and code questions for the pump circuit, disconnects, bonding, grounding, and control equipment when those items are outside the well professional’s scope.
- A plumber or water-treatment professional: household distribution plumbing, fixtures, treatment design, cross-connections, and whether installed treatment is working as claimed.
- A septic professional or local permitting authority: septic location, condition, separation requirements, and compliance. A well inspection is not a septic inspection.
- The buyer, seller, agent, and lender: who pays, who receives reports, which deficiencies must be corrected, whether the buyer may retest, and what happens if access or records are missing.

Do not open energized controls, test live wiring, open a well seal or casing, pull a pump, enter a pit or other confined space, or manipulate a pressurized tank, switch, valve, or relief device as a homeowner experiment. Do not stand in floodwater near pump equipment. The safe homeowner action is to observe from a dry, accessible area, photograph labels only when safe, and give the observations to the qualified professional. EPA specifically warns to stay away from a flooded well pump because of electric-shock risk and directs owners to obtain well or pump-contractor help after flooding. [EPA’s private-well protection guidance](https://www.epa.gov/privatewells/protect-your-homes-water) also directs owners to use a certified well driller for construction, modification, abandonment, and closure work.

## 3. Build the written scope and evidence packet

Send the same written scope to the well professional, seller, agent, and lender. Ask the professional to mark each line as observed, measured, documented, not accessible, not included, or recommended for follow-up. “No concern noted” is weaker than a recorded observation such as “cap visible; casing condition not assessed below grade.”

### Gather before the site visit

Create one folder containing:

- property address, parcel number, state, county, and well location shown on the seller’s map;
- purchase-agreement and inspection-contingency deadlines;
- lender requirements and any required transfer form;
- the seller’s well disclosure, construction report, well log, sealing records, permits, repair invoices, pump and pressure-tank information, treatment manuals, and prior laboratory reports;
- the date and location of the last known water test;
- a list of all water uses that matter to the buyer: occupants, irrigation, livestock, fire protection, hot tub, high-flow fixtures, or a second dwelling; and
- local information about septic, flooding, agriculture, mining, fuel storage, industrial sites, land disturbance, or a known groundwater problem.

Texas guidance asks buyers for the well report, water-quality tests, and maintenance records. It also says the original well report can show installation date, construction, total depth, pump depth, and yield at the time the well was drilled, while current inspection data can show changes over time. That is the right way to use a well log: as a baseline to compare with today’s evidence, not as proof that today’s pump and aquifer will perform the same way. [Texas Groundwater Protection Committee](https://tgpc.texas.gov/POE/FAQs/BuyingPropertywithPrivateWaterWell_FAQ.pdf) makes this historical-versus-current distinction explicit.

### Put these deliverables in the engagement letter

| Scope line | Ask the professional to document | If unavailable, record this as |
|---|---|---|
| Well identity | Number of wells found, active/unused/sealed status, location, type if identifiable, and record search used | “Well count or status not verified” |
| Construction | Available total depth, casing information, well cap or seal, pump set depth if documented, construction report, and below-grade limits | “Below-grade condition not observed” |
| Wellhead and site | Drainage away from well, standing water or flooding evidence, visible casing/cap/seal condition, nearby contamination sources, and access | “Visual-only observation; buried features excluded” |
| Pressure system | Pump type if identifiable, pressure-tank make/model/size if label is readable, gauge readings, switch settings if safely documented, leak evidence, cycling, and treatment equipment | “Label or control not accessible; no live electrical testing” |
| Current performance | Test method, start/end time, discharge point, rate, duration, water-level readings if taken, recovery observations, and limitations | “No current capacity evidence” |
| Water sample | Lab, sample point, whether before or after treatment, collection method, date/time, analytes, units, and report | “Sample location or chain of custody does not answer the intended question” |
| Exclusions | Household plumbing, electrical code, septic, well opening, pump pull, confined-space entry, and treatment certification | “Separate professional needed” |

Request actual field notes and the completed report, not only a verbal “it looks fine.” Keep the raw laboratory report, not just a lender’s pass/fail summary. Save serial numbers and model labels when the professional can document them safely. If treatment equipment stays with the house, get its purpose, cartridges or media, service interval, backwash or drain requirements, manuals, and recent service records. A treatment device can change the sample result without demonstrating that the well source itself is clean.

### Search for unused wells

An unused well is part of the property decision even when the active well works. Ask the seller to identify every known well, plugged well, capped well, abandoned well, irrigation well, monitoring point, and well serving an outbuilding. Search the state or county record system, inspect the parcel for likely locations, and ask the well professional what evidence would be needed to confirm status. Do not lift a cover, open a cap, dig, or enter a pit yourself.

The Texas FAQ tells buyers to ask whether there are multiple wells and whether plugged or capped wells have been properly decommissioned. Wisconsin says its property-transfer process searches for unused wells because an unused well can threaten groundwater and drinking water if it is not properly filled and sealed. [Texas guidance](https://tgpc.texas.gov/POE/FAQs/BuyingPropertywithPrivateWaterWell_FAQ.pdf) and [Wisconsin DNR guidance](https://dnr.wisconsin.gov/topic/Wells/RETransfer.html) support making the unused-well search an explicit deliverable rather than an assumption.

## 4. Witness a flow or recovery record without overreading an old yield

Ask for a current, dated performance record that explains what was actually done. “The faucets ran” is not a flow test. “The well yields 10 gallons per minute” is incomplete unless the report identifies the test method, duration, water-level conditions, discharge point, and whether the number came from the original drilling report or a current observation.

### What the current record should contain

Ask the professional to record, when the equipment and site permit it:

- date, time, weather or recent-drought/flood context if relevant, and the property’s water uses during the observation;
- the starting condition, including whether the system had been idle and whether a static water level was measured;
- the discharge point and how discharge was measured;
- gallons or another stated volume, elapsed time, and the calculated observed rate;
- whether the rate remained steady, declined, pulsed, or stopped;
- pump starts and stops, pressure-gauge behavior, unusual noise, leaks, and short cycling observed from a safe position;
- pumping water-level and recovery readings if the professional’s method includes them;
- the time required for recovery or the fact that recovery was not measured; and
- the professional’s conclusion, limits, and recommended follow-up.

The simple calculation is:

**Observed discharge rate = measured gallons ÷ elapsed minutes**

For example, 120 gallons collected over 20 minutes is an observed rate of 6 gallons per minute. That arithmetic is not a capacity guarantee. Label it “6 gpm observed at this discharge point for this 20-minute observation,” unless the professional has completed a defined test protocol and is willing to characterize the result as a yield or capacity measurement. Keep the measured volume, time, and conditions in the packet so another professional can understand the number.

Do not convert the original well-log yield into a promise about the next owner’s water supply. Texas says the original yield is the yield when the well was drilled and should be considered alongside current inspection data. Wisconsin cautions that yields can vary and that household population, high-use fixtures, and sprinkling systems can affect performance. Those cautions are why the buyer should ask for current evidence and disclose intended demand. [Wisconsin DNR’s capacity guidance](https://dnr.wisconsin.gov/topic/Wells/RETransfer.html) and the [Texas buyer FAQ](https://tgpc.texas.gov/POE/FAQs/BuyingPropertywithPrivateWaterWell_FAQ.pdf) both support separating historical yield from current performance.

### Match the result to the failure branch

| Current observation | Safe interpretation | Next step before closing |
|---|---|---|
| Water flows at a stated rate, but duration and water-level recovery are absent | A short observation shows delivery at that moment, not sustained recovery or drought resilience | Ask the well professional whether a defined flow/recovery test is warranted for the property and lender |
| Rate falls during the observation or the system stops recovering | Possible performance, pump, control, aquifer, or demand issue; the cause is not identifiable from the symptom alone | Keep the contingency open for diagnosis; obtain a written cause assessment and repair or replacement options |
| Pressure rises and falls rapidly, pump starts repeatedly, or the system cannot hold pressure | The pressure system needs professional diagnosis; do not adjust the switch or tank yourself | Have a pump professional document gauge behavior, controls, tank information, and safe repair scope |
| The old report shows a strong yield but the current system cannot reproduce it | Historical capacity does not establish present capacity | Treat the current deficiency as unresolved; do not accept the old number as a substitute |
| No one can access the wellhead, pump controls, or discharge point | The absence of evidence is an access limitation, not a pass | Negotiate access, a specialist visit, or a written risk allocation before the deadline |
| The well works only after treatment or a storage tank is bypassed/engaged | Source, pump, storage, and treatment performance may be confounded | Ask for separate source, pressure-system, storage, and treated-water observations |

The buyer’s goal is not to force a professional to promise future gallons. It is to make uncertainty visible while there is still a contractual choice: accept, negotiate, investigate, require repair, obtain insurance or lender approval where available, or walk away under the contract.

## 5. Inspect the wellhead, pressure system, equipment, and exclusions

Start with what can be observed safely from the ground. A buyer may note whether the well location is identifiable, whether surface water appears to drain toward it, whether there is standing water or recent flood evidence, whether the casing or cap appears damaged, and whether the pump house or equipment area shows water damage. Photograph labels and accessible components only when the area is dry and stable, without removing covers or touching wiring.

EPA lists exposed casing, a missing or broken cap, and settling or cracking of a surface seal as problems worth periodically inspecting. The Texas buyer FAQ similarly calls out the slab or sleeve around the wellhead, drainage away from the pipe, visible water damage, and a properly sealed wellhead. These are visual screening observations; they do not establish below-grade integrity or compliance in every state. [EPA’s exposed-component guidance](https://www.epa.gov/privatewells/protect-your-homes-water) and [Texas’s preliminary inspection guidance](https://tgpc.texas.gov/POE/FAQs/BuyingPropertywithPrivateWaterWell_FAQ.pdf) are the source-backed examples.

Ask the well or pump professional to capture the following without unsafe access:

- wellhead location, casing and cap/seal condition, drainage, flood exposure, and nearby contamination sources;
- available construction report details and any mismatch between the record and the field location;
- pump type and accessible identification, pump set depth if documented, and the limits of what can be inferred without pulling the pump;
- pressure-tank label, nominal size if stated by the manufacturer, visible corrosion or leakage, pressure-gauge readings, and control behavior;
- pump starts and stops during the performance observation, including any unusual cycling or inability to reach/hold the observed pressure;
- treatment devices, bypass status, filter or media labels, drain connections, service records, and whether the sampled water passed through the device; and
- every inaccessible, buried, concealed, or untested component.

Do not ask a generalist to silently extend the scope. Wisconsin explicitly says its transfer inspection does not include the plumbing distribution system or electrical-code requirements, and that buried casing depth or possible contamination sources may require opening, excavation, or records research. [Wisconsin’s scope and exclusions](https://dnr.wisconsin.gov/topic/Wells/RETransfer.html) are a useful prompt for writing exclusions into the engagement letter.

That means the buyer should separately ask: Is the house wiring and pump circuit safe and code-compliant? Are interior pipes, fixtures, and service lines contributing lead, copper, taste, or corrosion? Is the septic system functioning and properly separated from the well? Does a treatment device have a verified contaminant-reduction claim and a service plan? None of those questions is answered automatically by a wellhead visual check.

## 6. Order water tests that match the source and the risk

Treat water quality as its own evidence stream. Before sampling, contact the lab that will perform the analysis. Ask for the correct bottle, preservation instructions, collection method, holding time, shipping or delivery deadline, sample-point requirements, and the lab’s state certification for each requested analysis. EPA directs private-well owners to use a state-certified drinking-water laboratory; it also notes that EPA does not test residential drinking water on request. [EPA’s laboratory-certification guidance](https://www.epa.gov/dwlabcert/contact-information-certification-programs-and-certified-laboratories-drinking-water) explains the handoff.

### Start with a baseline, then add local risks

For ongoing private-well stewardship, CDC recommends at least annual testing for total coliforms, pH, total dissolved solids, and nitrates. It also tells owners to ask the local health department about additional germs or chemicals based on local conditions. [CDC’s current guidance](https://www.cdc.gov/drinking-water/safety/guidelines-for-testing-well-water.html) is health guidance, not a claim that every state requires that exact panel at a real-estate transfer.

The Texas Groundwater Protection Committee makes the ownership responsibility especially plain in its state guidance: private-well users are responsible for checking the quality of their domestic water, and it recommends annual testing after the initial test. That is a Texas recommendation, not a national transfer mandate; use it as a reminder to ask the property’s own health authority and lender what applies. [Texas’s buyer FAQ](https://tgpc.texas.gov/POE/FAQs/BuyingPropertywithPrivateWaterWell_FAQ.pdf) also points buyers toward accredited laboratory resources.

For a purchase, begin with the panel required by the state, county, lender, or contract, then ask the health department or laboratory whether the property’s context calls for more. EPA’s risk table gives examples: nitrate, nitrite, pesticides, and coliform bacteria may be relevant near intensive agriculture; volatile organic compounds near a fuel tank, gas station, landfill, factory, or dry cleaner; and metals, pH, or corrosion-related tests near mining or industrial activity. The agency says these are candidate concerns and that test selection depends on local conditions. [EPA’s risk-based test guidance](https://www.epa.gov/privatewells/protect-your-homes-water) should not be turned into a universal “everything panel.”

Ask whether the buyer needs, at minimum, the following categories:

- bacteria indicators, including the lab’s stated total-coliform and E. coli or fecal-coliform method;
- nitrate or nitrate-nitrogen, with the reporting unit clearly shown;
- pH and total dissolved solids when recommended for the property or included in the agreed baseline;
- arsenic or other naturally occurring contaminants identified by the state, county, geology, or past results;
- lead, copper, or corrosion-related tests when the plumbing, service lines, or pH make them relevant;
- volatile organic compounds, fuel-related compounds, pesticides, metals, salts, or radionuclides when nearby conditions, records, or the local program justify them; and
- a separate treated-water sample if the buyer needs to evaluate water after an installed treatment device, while preserving a source-water sample when the question is the well itself.

Do not let a treatment device obscure the source question. Write the sample point in plain language: “raw well water before treatment,” “after softener,” “kitchen cold tap,” or another exact location. Wisconsin says that its transfer inspector may sample at any point but considers a tap near the pressure tank best for assessing groundwater quality; it also says the program’s required panel and additional lender tests are separate decisions. [Wisconsin’s sampling guidance](https://dnr.wisconsin.gov/topic/Wells/RETransfer.html) supports asking the lab and local authority to confirm the right location for this property.

### Interpret a report without inventing a pass

A laboratory result is a dated measurement for the analytes and sample point requested. It is not a full certification of the well, pump, pressure tank, plumbing, treatment equipment, or future water quality. Check that the report identifies the sample, collection date, receipt date, analytes, units, detection limits, and any comparison standard. If a result is positive or exceeds a health-based value, do not choose treatment from a sales label alone. CDC says to contact local health or environmental officials for help understanding harmful germs or chemicals and deciding what to do next. [CDC’s response guidance](https://www.cdc.gov/drinking-water/safety/guidelines-for-testing-well-water.html) also advises using another safe water source when results show harmful contamination while the issue is addressed.

The safest purchase workflow for a concerning result is: confirm the sample and chain of custody; ask the lab or health authority whether a confirmation sample is appropriate; determine whether the result is from source water, treated water, or household plumbing; identify the contaminant-specific treatment or alternative source; and put responsibility, timing, retesting, and cost allocation in the contract. EPA notes that treatment depends on the contaminant, its concentration, and the well’s condition, and that some situations may require a new source or well. [EPA’s treatment guidance](https://www.epa.gov/privatewells/protect-your-homes-water) is why “we can add a filter” is not a complete remedy statement.

## 7. Turn the packet into a purchase decision

Use the matrix below at the inspection review meeting. The colors are decision prompts, not legal or health classifications.

| Packet status | What is present | Decision posture | Required next action |
|---|---|---|---|
| Ready to evaluate | Every well identified; current professional report; stated flow/recovery method; source and treated samples labeled; records and exclusions attached | Proceed to normal lender and contract review | Save the packet, list maintenance items, and confirm final lender acceptance |
| Evidence gap | Missing well log, unknown pump/tank data, no current recovery observation, sample taken only after treatment, or inaccessible wellhead | Do not call it a pass | Extend or preserve the contingency if possible; obtain the missing evidence or price the uncertainty explicitly |
| Mechanical concern | Flow declines, pressure will not hold, pump cycles abnormally, visible leak/flood damage, or current performance conflicts with the old report | Pause the purchase decision | Get a written diagnosis, repair/replacement scope, and retest plan from a qualified professional |
| Water-quality concern | Positive bacteria indicator, elevated nitrate, or a site-specific chemical result needing interpretation | Protect health first; do not rely on taste or a sales promise | Use safe water as advised, contact the health authority, confirm the result, and require a contaminant-specific remedy plan |
| Records or property concern | Unused well, unknown capped well, missing closure record, well on a different parcel, or well near a possible contamination source | Treat as unresolved legal, environmental, and financial risk | Ask the governing authority and qualified contractor what documentation or closure action is required before closing |
| Scope conflict | Home inspection says “well not inspected,” lender asks for a different test, or two reports use different sample points or definitions of yield | Reports are not comparable yet | Reconcile scope, credentials, test method, sample location, and deadline in writing |

Some deficiencies are repairable; others change the economics or lender approval. Do not negotiate from a single red flag without asking what evidence would distinguish a minor correction from a source, aquifer, pump, or compliance problem. Conversely, do not let a low-cost-looking filter proposal erase an unresolved well, plumbing, or electrical issue.

Before the inspection contingency expires, make the contract file answer four commercial questions:

1. Which exact condition is the seller responsible for correcting, if any?
2. Who selects and pays the follow-up professional and laboratory?
3. What report, retest, closure record, or lender sign-off counts as completion?
4. What happens if the follow-up cannot establish safe water or reliable current performance?

Put those answers in an amendment or written instruction through the parties’ qualified real-estate and legal advisers. This guide does not decide a state disclosure, contract, financing, or legal question.

## 8. Send this buyer handoff and keep the system legible after closing

Copy this short scope into an email to the well professional, then attach the contract and lender requirements:

> I am evaluating a property with a private well before purchase. Please identify all wells found and their status; review available construction, sealing, repair, and treatment records; document the accessible wellhead, casing/cap/seal, site drainage, pump and pressure system, treatment equipment, and all access limitations; and provide a dated current performance record that states the flow or recovery method, measured volume, elapsed time, water-level observations if taken, pressure behavior, and limitations. Please state what you did not inspect, including household plumbing distribution, electrical-code review, septic, buried construction, well opening, pump pulling, confined-space entry, and treatment-performance certification. Please identify the sample point and whether each sample was before or after treatment, and send the raw report and recommendations directly to the buyer.

Ask the seller or agent to deliver:

- every well construction, repair, maintenance, testing, disclosure, permit, and sealing record;
- the location and status of every active, unused, capped, plugged, abandoned, irrigation, and outbuilding well;
- pump, pressure-tank, control, treatment, filter, and media information;
- the last known service date and any recurring low-pressure, dry-well, odor, color, bacteria, nitrate, or treatment problem;
- the lender’s required inspection and laboratory format; and
- access to the wellhead, pump room, discharge point, sample taps, and records before the deadline.

After closing, convert the evidence packet into a maintenance record. CDC and EPA recommend at least annual private-well testing for core indicators, and CDC says to test sooner after a repair, flooding or land disturbance, a change in taste, color, or smell, or another local concern. [CDC’s testing schedule](https://www.cdc.gov/drinking-water/safety/guidelines-for-testing-well-water.html) and [EPA’s maintenance guidance](https://www.epa.gov/privatewells/protect-your-homes-water) give the recurring baseline. Keep the well report, current measurements, laboratory reports, treatment changes, disinfection records, and professional invoices together so the next diagnosis has a timeline.

The purchase decision is complete only when the buyer can say, in writing: “This is every well we found; this is what the current system did under the recorded conditions; this is what the laboratory tested and where; this is what the equipment and records show; these are the unresolved limits; and this is who must act next.”

## Evidence

- [Buying or selling a home or property with a private well | Property transfer well inspections](https://dnr.wisconsin.gov/topic/Wells/RETransfer.html) — Wisconsin property transfers and Wisconsin licensing rules; use as a state example, not a national requirement.
- [Buying or selling a home or property with a private well | Property transfer well inspections](https://dnr.wisconsin.gov/topic/Wells/RETransfer.html) — Wisconsin property-transfer inspection form and scope; not a definition of every state's inspection scope.
- [Buying or selling a home or property with a private well | Property transfer well inspections](https://dnr.wisconsin.gov/topic/Wells/RETransfer.html) — Wisconsin property-transfer sampling rules and guidance; local requirements and sample points vary elsewhere.
- [Buying or selling a home or property with a private well | Property transfer well inspections](https://dnr.wisconsin.gov/topic/Wells/RETransfer.html) — Wisconsin DNR consumer guidance about well capacity and performance; supports cautious interpretation, not a national yield formula.
- [What You Should Know Before Buying Property with a Private Water Well FAQ](https://tgpc.texas.gov/POE/FAQs/BuyingPropertywithPrivateWaterWell_FAQ.pdf) — Texas buyer guidance; questions are broadly useful, but licensing and legal requirements remain state and local.
- [What You Should Know Before Buying Property with a Private Water Well FAQ](https://tgpc.texas.gov/POE/FAQs/BuyingPropertywithPrivateWaterWell_FAQ.pdf) — Texas Groundwater Protection Committee pre-purchase documentation guidance; the distinction between historical and current data is the relevant transferable principle.
- [What You Should Know Before Buying Property with a Private Water Well FAQ](https://tgpc.texas.gov/POE/FAQs/BuyingPropertywithPrivateWaterWell_FAQ.pdf) — Texas private-well ownership guidance; not a national testing mandate.
- [Guidelines for Testing Well Water](https://www.cdc.gov/drinking-water/safety/guidelines-for-testing-well-water.html) — CDC health guidance for private well water; annual guidance is not a universal property-transfer rule.
- [Guidelines for Testing Well Water](https://www.cdc.gov/drinking-water/safety/guidelines-for-testing-well-water.html) — CDC private-well sampling and health-response guidance in the United States.
- [Private Drinking Water Well Programs in Your State](https://www.epa.gov/privatewells/private-drinking-water-well-programs-your-state) — EPA overview of U.S. private-well program variation; not a substitute for the property's governing authority.
- [Contact Information for Certification Programs and Certified Laboratories for Drinking Water](https://www.epa.gov/dwlabcert/contact-information-certification-programs-and-certified-laboratories-drinking-water) — EPA laboratory-certification guidance for independent residential drinking-water testing.
- [Protect Your Home's Water](https://www.epa.gov/privatewells/protect-your-homes-water) — EPA private-well testing and treatment guidance; candidate tests require local confirmation and do not constitute a universal panel.
- [Protect Your Home's Water](https://www.epa.gov/privatewells/protect-your-homes-water) — EPA private-well protection guidance; certification and closure procedures are implemented through state and local programs.