Maine
For Maine, disclosure required is Yes; sellers must provide a disclosure statement regarding known defects and presence of hazardous materials including radon. Landlords must provide written radon notice to tenants including test results and mitigation information; testing mandated is Yes; residential landlords must have the air in their rental properties tested for radon, with re-testing every 10 years when requested by a tenant; professional certification required is Yes; persons who test for or mitigate radon must register with the Department of Health and Human Services; action level pci l is 4.0 pCi/L; school testing required is Yes; school administrative units may test occupied schools every five years for radon. Newly-built schools must use radon-resistant construction techniques, recorded from its source on 2026-08-15.
- jurisdiction
- Maine verified
- disclosure required
- Yes; sellers must provide a disclosure statement regarding known defects and presence of hazardous materials including radon. Landlords must provide written radon notice to tenants including test results and mitigation information.
- testing mandated
- Yes; residential landlords must have the air in their rental properties tested for radon, with re-testing every 10 years when requested by a tenant.
- professional certification required
- Yes; persons who test for or mitigate radon must register with the Department of Health and Human Services.
- action level pci l
- 4.0 pCi/L verified
- school testing required
- Yes; school administrative units may test occupied schools every five years for radon. Newly-built schools must use radon-resistant construction techniques.
- statute citation
- Maine Revised Statutes, tit. 33, § 173; tit. 14, § 6030-D; tit. 22, §§ 771--784; tit. 20-A, § 4013
What the source says
Maine Revised Statutes, tit. 22, § 785 ME Establishes the Maine Gold Standard for Radon Testing and Mitigation Initiative effective July 1, 2022, to recognize, promote and assist, landlords, homeowners and home builders who meet the radon testing and mitigation criteria set forth in the law. Criteria for landlords to receive the gold standard designation include radon testing every two years and mitigation of radon levels above 4.0 pCi/L, with the Department of Health and Human Services paying the first $600 in mitigation expenses.
— eli.org, retrieved 2026-08-15
Source
- eli.orghttps://www.eli.org/sites/default/files/files-pdf/2025%20Radon.pdf