Ohio
For Ohio, disclosure required is Yes; sellers of residential real property of up to four units must deliver a disclosure form disclosing the presence of hazardous materials including radon gas; testing mandated is No; professional certification required is Yes; state licensing required for persons providing professional radon testing and mitigation services; action level pci l is No state-specific action level; follows EPA recommended 4 pCi/L; school testing required is No, recorded from its source on 2026-08-15.
- jurisdiction
- Ohio
- disclosure required
- Yes; sellers of residential real property of up to four units must deliver a disclosure form disclosing the presence of hazardous materials including radon gas. verified
- testing mandated
- No
- professional certification required
- Yes; state licensing required for persons providing professional radon testing and mitigation services.
- action level pci l
- No state-specific action level; follows EPA recommended 4 pCi/L
- school testing required
- No
- statute citation
- Ohio Revised Code §§ 5302.30, 3723.01--.18, 3748.20
What the source says
Requires sellers of residential real property containing up to four units to deliver a disclosure form to buyers disclosing material defects and the presence of hazardous materials or substances, including radon gas.
— eli.org, retrieved 2026-08-15
Source
- eli.orghttps://www.eli.org/sites/default/files/files-pdf/2025%20Radon.pdf