Direct answer
Yes. Any foundation work, sump pit modification, or significant air-sealing changes the radon equilibrium. Retest within 30-90 days of completion. We include a free post-mitigation 12-month retest with every install.
Authoritative sources
- US EPA ↗
Cincinnati and surrounding counties sit in EPA Radon Zone 1, the highest-risk classification.
- EPA Citizen's Guide to Radon ↗
EPA recommends mitigation above 4.0 pCi/L and consideration of mitigation between 2.0 and 4.0 pCi/L.
- Ohio Department of Health ↗
Ohio Radon Program guidance on testing, mitigation, and contractor licensure.
Related questions
- How much does radon mitigation cost in Cincinnati? →
- How long does the installation take? →
- Is radon really dangerous in Cincinnati? →
- How does radon enter my Cincinnati home? →
- How often should I test for radon? →
- Should I do short-term or long-term radon testing? →
- Is your radon system warrantied? →
- Will a radon system increase my utility bills? →
- Will I hear the radon fan? →
Ready to get started in Cincinnati?
We connect Greater Cincinnati homeowners with NRPP-credentialed radon mitigators in our partner network. Mon-Sat 8am-7pm.