| Requirement Level | Who Pays | Result Validity | Authority |
|---|---|---|---|
| No state mandate; loan-required | Negotiated | Per loan type | Ohio EPA Division of Drinking and Ground Waters |
Overview: Ohio Well Water Rules
Ohio's flat agricultural landscape makes it a significant nitrate risk area. Private wells in Ohio agricultural counties (Mercer, Darke, Allen, Putnam) should be tested for nitrates at least annually. The Ohio EPA maintains a list of certified labs. There is no state law requiring testing at point of sale.
What Must Be Tested in Ohio
| Parameter | Standard | Requirement |
|---|---|---|
| Coliform bacteria | Absent | Loan-required; annual recommended |
| Nitrate | ≤10 mg/L | Priority in agricultural counties |
| pH | 6.5–8.5 | Loan-required |
| Lead | ≤0.015 mg/L | Loan-required |
Finding a State-Certified Lab in Ohio
Ohio requires testing through a state-certified laboratory. To find a lab:
- Contact your county health department — many maintain a local lab referral list
- Search the Ohio EPA Division of Drinking and Ground Waters website for a list of certified labs
- Use our national certified lab finder guide for resources
Do not use a DIY kit or an uncertified online mail-in service for loan transactions or state-required testing. Results must come from a Ohio EPA-certified laboratory.
Federal Loan Requirements in Ohio
Regardless of Ohio's state requirements, federal loan programs impose their own standards:
- VA loans: Always require a water quality test, results valid 90 days. VA guide →
- FHA loans: Require testing when proximity triggers are met (well within 100 ft of septic, etc.). FHA guide →
- USDA loans: Always require testing, results valid 180 days. USDA guide →
I’m buying with cash in Ohio — do I need a well water test?
For a cash purchase in Ohio, there is no legal requirement in most situations. However, conducting your own water quality test is strongly recommended. A basic certified lab test costs $100–$200 and is far less expensive than discovering contamination after closing.
How much does well water testing cost in Ohio?
A basic certified lab panel in Ohio (coliform + nitrates + pH) typically costs $75–$150. A comprehensive panel meeting loan requirements runs $150–$350. Some county health departments offer subsidized testing programs — call your county health office to check. See our full cost guide for more detail.
← Back to all state requirements
Disclaimer State requirements change. Always verify current rules with your Ohio EPA Division of Drinking and Ground Waters and your transaction’s real estate attorney before relying on this information.