How do you identify a private well?
Ask directly, and look for a well cap or cover, a small round or rectangular fixture typically a few inches to a couple feet tall, somewhere in the yard away from the house. In rural areas without visible municipal infrastructure, assume a well until confirmed otherwise.
What should you ask about well depth and output?
Ask for the well's depth, its flow rate in gallons per minute, and how it's held up against the household's actual usage. HUD sets 3 to 5 GPM as a minimum for existing wells, but the practical target scales with the size of the house.
| Home size | Recommended minimum flow |
|---|---|
| 2 bed, 1 bath | 6 GPM |
| 3 bed, 2 bath | 12 GPM |
| 4 bed, 2 bath | 14 GPM |
| 4 bed, 3 bath | 16 GPM |
A well that meets HUD's bare minimum but not the household-size recommendation can technically pass while still running short during heavy simultaneous use, laundry and a shower at the same time, for example. Ask for the actual GPM figure rather than a simple pass or fail.
Which water quality problems are visible?
Discoloration, a sulfur or rotten-egg smell, or visible sediment in a glass of tap water are all worth noting, but none of them confirm or rule out the specific contaminants that actually matter for health and for loan approval. Visible clarity is not the same as tested safety.
What does drilling a new well cost?
Most residential drilling projects run $5,500 to $18,000 fully equipped, with a typical 200-foot well landing around $6,000 to $16,000. Deep or hard-rock wells can exceed $25,000. This is the number to keep in mind if an existing well's output is genuinely inadequate rather than just needing a pump repair.
Which water tests should you order?
At minimum, total coliform bacteria, E. coli, nitrates, nitrites, lead and arsenic, the same panel FHA, VA and USDA loans require when a property is on a private well. Total coliform must come back at zero colonies per 100 mL, and nitrates must stay under 10 mg/L.
For an FHA-backed loan, the water sample cannot be collected by the buyer, seller, or either agent. It has to be collected by a disinterested third party, a health official or a certified lab technician. This is a real procedural requirement, not a formality, and it's worth confirming with your lender early since it affects how you schedule the test.
Testing costs range from free (some counties offer basic testing) up to $500 or more for a comprehensive panel. The FHA-specific test alone runs around $80, or $350 to $550 when bundled with a full well inspection.
Questions buyers ask
- How long does a well pump last?
- Well pumps typically last 8 to 15 years, though this varies with pump type, well depth and how hard the system works. Replacement runs $975 to $2,821 on average.
- Is well water safe to drink?
- It can be, but unlike municipal water it isn’t tested or treated by default. Safety depends entirely on what’s actually in the specific well, which is exactly why testing before you buy matters more than it would with city water.
- Does FHA require a well water test?
- Yes, if the home is served by a private well, FHA requires a water quality test before the loan can close, checking at minimum for coliform bacteria, nitrates, nitrites, lead and arsenic.
- What is an acceptable well flow rate?
- HUD sets a 3 to 5 GPM minimum for existing wells and 5 GPM for new ones, though 6 GPM is the more common baseline recommendation, scaling up to 12 to 16 GPM for larger homes with more bathrooms.
Related checks
Well pump and drilling cost figures: Angi, HomeGuide, The Well Guide, DrillerDB 2026 guides. Testing requirements and procedure: ETR Labs, FHP Inspections, TapWaterData, 360 Home Inspections. Flow rate guidance: HUD minimum standards via LeafHome and Alpha Environmental, New Hampshire DES minimum water supply capacity standard. Figures are national averages current as of September 2026.