Water tests, flow rates, shared wells and septic distances, including FHA's July 2026 well-distance waiver.
A practical guide for Idaho Realtors, buyers and sellers working with FHA or VA financing on a home with a private or shared well, including FHA's July 2026 well-distance waiver for existing homes.
By Gerald Robinson, CRMS, President and CEO of 1st Choice Mortgage Company, LLC, Idaho mortgage broker and IREC Certified Continuing Education Instructor. Last reviewed September 2026.
Both FHA and VA require safe, potable water that meets the standards of the health authority with jurisdiction, and both require a disinterested third party to collect and transport any required water sample. The biggest differences are timing and flow: an FHA water test can be up to 180 days old at disbursement, while a VA test is valid for 90 days. FHA sets specific gallons-per-minute standards for new-construction individual wells and for shared wells, while VA's national guidance requires a continuing supply of safe water without a single numeric flow standard.
Local health-authority rules, property conditions and individual lender guidelines can add requirements beyond this table.
On this page
When a lender says a property "needs a well inspection," it could mean several different things. Knowing which one is being requested can prevent unnecessary costs and last-minute delays.
A laboratory analysis that shows whether the water is safe to drink, typically for bacteria and other contaminants required by the health authority with jurisdiction.
A test showing whether the well can produce enough water over time. This is where gallons per minute (GPM) and test duration matter. A glance at the faucet pressure is not a production test.
An evaluation of the physical system, usually by a well or pump professional, which may cover:
The appraiser is not performing a mechanical well inspection. The appraiser evaluates the property against FHA's or VA's minimum property requirements and reports observable conditions that may call for further testing or inspection.
Realtor tip
When a lender asks for the well to be "tested," ask: Do you need a water-quality test, a flow test, a mechanical inspection, or a combination? One question now can save an extra trip and an extra invoice later.
Nearly every private-well question falls into one of two categories. A well can pass one and fail the other.
Quality: is the water safe?
Bacteria, E. coli, nitrates, nitrites, chemicals and other contaminants. Answered by a laboratory water analysis.
Quantity: is there enough water?
Gallons per minute, sustained production, recovery, storage and pressure. Answered by a flow or pumping test.
A well that produces 15 gallons per minute can still contain unsafe bacteria. A well with perfectly clean water may not produce enough to serve the home. A passing water-quality test does not prove adequate production, and a strong flow test does not prove the water is safe to drink.
FHA requires an acceptable individual water supply. Water quality must meet the standards of the local or state health authority; if there are none, EPA drinking water standards apply. FHA also sets testing rules and, in certain situations, production standards.
No. FHA requires a water test in specific situations, including when:
The lender may also require a test on its own. Rather than telling every seller with an existing well that FHA "requires a well test," contact the lender early and confirm what that property needs.
Under Handbook 4000.1, the appraiser must note readily observable well deficiencies and require a test or inspection when conditions like these are present:
Because much of rural Southwest Idaho sits near active farmland, the quarter-mile agriculture condition is worth checking on any acreage listing before the appraisal is ordered.
There is no single, universal "FHA water test." The panel is set by the health authority with jurisdiction. A typical private-well analysis includes:
Our recommendation: add an arsenic test
Arsenic is not on the typical FHA or VA panel, and neither program requires it nationally. We still recommend adding it. Arsenic can occur naturally in groundwater, and we are seeing some Idaho wells come back high. It has no taste, smell or color, so testing is the only way to know. EPA's drinking water limit for arsenic is 10 parts per billion. Ask the lab to include it when the sample is scheduled.
Additional contaminants may be required based on local rules or nearby conditions such as agriculture, fuel or chemical storage, landfills or industrial sites. Confirm the required panel with the lender before the sample is collected. Ordering the least expensive "basic" lab kit and hoping it fits often means paying for a second test.
When FHA requires testing, a disinterested third party must handle the collection and the transportation of the sample. Acceptable parties include the local health authority, a commercial testing laboratory, a licensed sanitary engineer, or another party acceptable to the local health authority.
The borrower, seller, real estate agents on either side, the builder, or anyone else with an interest in the sale should not collect or carry the sample. The water could test perfectly and the result could still be rejected because of who handled the bottle.
Sometimes. The answer depends on whether the well is individual or shared, and whether the home is existing or new construction. These rules should not be mixed together.
This is a new-construction standard. It should not be applied automatically to every existing FHA home with an individual well.
For an existing home with its own well, the lender looks to the appraisal, local requirements and its own guidelines to decide whether production needs to be documented and how. Ask the lender before scheduling a pump test.
A well with a lower yield can still qualify if pressurized storage makes 720 gallons available to each connected existing dwelling, or 1,200 gallons to each proposed dwelling, during a continuous four-hour period. The system's yield must be demonstrated by a certified pumping test or other means acceptable to all agreeing parties.
Flow is only one piece. FHA also looks at:
If you are listing a rural Idaho home on a shared well, find the well-sharing agreement at listing time, not when underwriting asks for it days before closing.
This change matters for Idaho agents working with older acreage and rural properties.
An older home whose well and septic had sat in the same place for decades, with local approval, could still run into these FHA-specific numbers.
On July 27, 2026, FHA announced a broad waiver of its well-distance requirements for existing construction (FHA INFO 2026-17), effective immediately. The waiver applies when both of these are true:
For the waiver, the local jurisdiction means the local health authority, environmental agency or governing municipality that inspected, permitted or grandfathered the private water system in its current configuration.
What this means in practice
On an existing home that falls short of FHA's old distances, a water test becomes part of the path to approval, even if none of FHA's usual testing triggers apply. Plan for a third-party water test early on these properties.
The waiver does not apply to FHA's minimum property standards for new construction. FHA described it as the first step in a broader update of its property requirements, so additional changes are expected. This page will be updated as they are released.
Now that local distances can govern FHA existing construction, knowing who the local authority is in Idaho is more useful than ever.
For a listing with a well and septic, requesting the health district's septic permit file and the IDWR well log at listing time gives the lender what it needs to evaluate distances under the waiver.
VA requires an individual water supply to provide a continuing supply of safe and potable water. Water quality must meet the requirements of the local health authority. If the local authority has no specific requirements, the state health authority's requirements apply, and if the state has none, EPA's requirements are used.
As with FHA, there is no single national VA panel. Testing is driven by the health authority. A typical private-well analysis includes total coliform bacteria, E. coli, nitrates and nitrites, with more added when local rules or known conditions call for it. As with FHA, we recommend adding arsenic even though it isn't required. Before ordering, ask the lender exactly which panel the property needs.
All VA testing must be performed by a disinterested third party, including the collection and transportation of the sample. The sample may be collected and tested by the local health authority, a commercial testing laboratory, a licensed sanitary engineer, or another party acceptable to the local health authority. VA states that the Veteran or other interested party may not collect or transport the sample.
Don't hand a VA buyer a sample bottle and send them to the property. Confirm that an acceptable third party is handling it.
That is half of FHA's window. Watch the dates on long escrows, construction transactions, delayed closings, contract extensions and properties that fall out of contract and later go back under contract.
No blanket national standard. VA does not state the 5-gallons-per-minute, four-hour requirement that FHA applies to new-construction individual wells. Additional testing or documentation can still be required because of local health-authority rules, appraiser observations, known problems with the well, shared-well arrangements or lender guidelines. Avoid telling a seller "VA requires 5 GPM for four hours."
VA permits shared wells when the well can provide a continuing supply of safe and potable water to each property simultaneously, with enough water for normal household use. VA also requires:
Unlike FHA, VA's national guidance does not set a numeric GPM figure for shared wells.
A failed water test is a problem to solve, not automatically the end of the transaction.
Share the lab report with the lender before choosing a fix, so the solution matches what the loan program will accept.
The appraiser evaluates the property against FHA or VA minimum property requirements. When the appraiser observes a condition involving water quality, the well's condition, the water supply, possible contamination, septic proximity or an unusual water source, the lender may require further inspection, testing or documentation.
The appraisal is not a substitute for the buyer's own home inspection or a professional well inspection.
The Idaho Department of Water Resources keeps a searchable database of Well Driller's Reports. A well log can show:
Two practical notes: IDWR's database contains most well reports from July 1987 forward, and older records are less complete. Since 1997, wells have been assigned a tag number (a "D" followed by seven digits) that can be found on the well itself and makes searching faster. The tag is on a small metal plate, about 2 by 3 inches, attached to the part of the well casing above ground. Without a tag number, you can search by township, range and section, the well's address, the last name of the owner when the well was drilled, or the subdivision.
Keep in mind
The flow rate on a well log is what the driller reported when the well was built. It is useful background, but it is not a current production test and does not replace one when a lender requires it.
Search IDWR well records
When a listing or a buyer's target home has a private well, try to answer these early, ideally before writing the offer:
Download the printable Realtor Private Well Checklist (PDF)
Rural Idaho homes with wells are often financed with USDA or conventional loans, which have their own water and septic guidelines. See our USDA Rural Development home loan guide or ask us about the specific property.
No. FHA requires a water test in specific situations, including new construction, when the appraiser reports a deficiency with the well or water, when the lender knows or is told the water may be unsafe, and when the property is near potential contamination sources such as dumps, landfills, industrial sites or intensive agriculture. A lender may also require a test on its own. A test is also required to use FHA's 2026 well-distance waiver on existing construction.
No. For both FHA and VA, a disinterested third party must collect and transport the sample, such as the local health authority, a commercial testing laboratory, a licensed sanitary engineer, or another party acceptable to the local health authority. The borrower, seller, real estate agents and other interested parties should not collect or carry the sample.
The required panel comes from the health authority with jurisdiction, so there is no single national FHA or VA test. A typical private-well panel includes total coliform bacteria, E. coli, nitrates and nitrites. Additional contaminants can be required based on local rules or conditions near the property. Confirm the panel with the lender before the sample is collected. Although it is not required, we also recommend an arsenic test, because some Idaho wells are testing high for arsenic.
When FHA requires a well water test, the report may be up to 180 days old at the loan disbursement date (Handbook 4000.1, Sections II.A.3.a.ii(O)(2)(b), II.A.3.a.ii(O)(3)(b) and II.A.8.i.vii(A)(6)(b)).
For VA purposes, a water test is valid for 90 days from the date certified by the local health authority. After 90 days, a new sample must be taken and tested. Watch this date closely on long escrows and extended closings.
FHA's 5 gallons per minute for at least four hours is the standard for an individual well serving new construction. It should not be applied automatically to every existing FHA property. Shared wells have their own FHA production standards.
A shared well serving existing construction must supply each dwelling simultaneously with at least 3 gallons per minute over a continuous four-hour period, or 5 gallons per minute per dwelling for proposed construction. A lower-yield well can qualify if pressurized storage makes 720 gallons available to each existing dwelling, or 1,200 gallons to each proposed dwelling, during that four-hour period. Yield must be shown by a certified pumping test or other means acceptable to all agreeing parties.
VA's national Minimum Property Requirements do not set a blanket 5-gallons-per-minute, four-hour standard. VA requires a continuing supply of safe and potable water. Local requirements, appraiser observations, shared-well arrangements or lender guidelines can still require additional testing.
Potentially. On July 27, 2026, FHA issued a waiver (FHA INFO 2026-17) allowing existing construction to follow the well-distance requirements of the local jurisdiction, provided the lender documents acceptable water test results. The local jurisdiction is the health authority, environmental agency or municipality that inspected, permitted or grandfathered the system in its current configuration. The waiver does not apply to new construction.
Septic systems in Idaho are governed by the Individual/Subsurface Sewage Disposal Rules (IDAPA 58.01.03) and permitted through Idaho's public health districts, such as Central District Health for Ada County and Southwest District Health for Canyon County. The Idaho Department of Water Resources licenses well drillers and keeps well construction records. The health district is usually the best first call about an existing system's permit history.
A failed test does not automatically end the transaction. Bacteria problems are often addressed by disinfecting the well (shock chlorination) and retesting, with the new sample again collected by a disinterested third party. Other contaminants may require a treatment system. If a home can only have safe water with a purification system, FHA has additional requirements under 24 CFR 203.52, including health-authority certification. Talk with the lender about the specific result before choosing a fix.
Yes, subject to requirements. FHA requires a shared well to serve existing properties that cannot feasibly connect to public or community water, meet production standards, provide safe water and have an acceptable well-sharing agreement. VA requires a continuing supply of safe water to each property simultaneously, a permanent easement for maintenance and repair, and a binding well-sharing agreement covering repair costs.
1st Choice Mortgage Company, LLC is not affiliated with or endorsed by HUD, FHA, VA or any government agency.
Private wells, shared wells, septic systems and acreage can raise financing questions that aren't obvious when an offer is written. It is much easier to review the property before you write the offer than to discover a problem a week before closing.
If you are an Idaho Realtor working with an FHA or VA buyer and you're unsure about a well, septic system or another property requirement, reach out. Gerald is happy to look at the scenario and help sort out what the financing may require.
Gerald Robinson, President and CEO1st Choice Mortgage Company, LLCCompany NMLS #380736 | Personal NMLS #4475Serving Idaho homebuyers and Realtors since 1992(208) 375-5626
Important information: FHA, VA, local jurisdiction and lender requirements can change and may vary by property and transaction. This page is for general educational purposes and does not replace property-specific underwriting, appraisal, health-authority or legal guidance. It is not a commitment to lend; loan approval is subject to acceptable property, appraisal, title, verification and underwriting review.
1st Choice Mortgage Company, LLC | Equal Housing Opportunity
About the author
Gerald Robinson, CRMS
President and CEO / Mortgage Broker, 1st Choice Mortgage Company, LLC | NMLS #4475
Gerald Robinson is President and CEO of 1st Choice Mortgage Company, LLC, a Meridian-based Idaho mortgage broker serving Idaho and Oregon since 1992. Gerald has originated mortgages since 2002, more than two decades guiding Idaho home loans to the closing table, with a focus on VA financing for Idaho veterans. He is an Idaho Real Estate Commission (IREC) Certified Continuing Education Instructor and teaches Idaho Realtors, including the VA loan class E3050, "Understanding VA Loans: A Comprehensive Guide for Realtors." Learn about his CE classes.
Explore: VA loans in Idaho | FHA loans in Idaho | Idaho Housing home loans
1st Choice Mortgage Company, LLC is an Equal Housing Opportunity Lender. Company NMLS #380736.
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