FHA septic and well requirements when a home is sold
For an FHA loan, a private septic system must be functioning with no evidence of failure. The appraiser flags visible problems, and the underwriter can condition the loan on a satisfactory septic evaluation. A private well water test is not automatic: FHA requires one only where a state or local authority requires it, the water needs continuous treatment to be safe, contamination is suspected, or the lender asks for it. When a test is required, the report may be up to 180 days old at the disbursement date and must be done by the local health authority or a certified lab.
Verified against HUD Handbook 4000.1 (2023 edition), 2026-09-10. General information, not lending advice — your lender applies the current handbook.
Septic
- The system must be sound and free of observable evidence of failure (surfacing effluent, backups, a saturated drainfield).
- A qualified appraiser, a government health authority, a licensed septic professional, or a qualified home inspector may perform the evaluation; additional inspection can be required based on what they find.
- If repairs are needed, they generally have to be completed (or an escrow holdback set up with lender approval) before the loan funds. See your options if the inspection fails.
Private well
- A water test is required only if a state/local authority requires it, the supply relies on continuous treatment, contamination is suspected, or the lender requires it. HUD removed the old rule that automatically required a test when the well was within 100 feet of the septic system.
- The water must meet state/local standards, or EPA limits where there are no local standards.
- The test must be done by the local health authority or a state-certified laboratory.
- Report age: up to 180 days old at the disbursement date.
- Missouri sets well-to-septic separation distances (19 CSR 20-3): 100 feet well to drainfield, 50 feet well to tank.
The county rule can be stricter. Even when FHA does not require a water test, your Missouri county might — see your county. St. Charles County, for example, requires a compliance inspection of the septic and the well at transfer regardless of the loan.
Sources & last verified
- ; well-water testing requirements and required documentation. Checked 2026-09-10.
- (Missouri onsite wastewater setbacks). Checked 2026-09-10.
Corrections: corrections@homecleared.com.