Direct answer
Pets that spend significant time in basements may have elevated lung-cancer risk. Veterinary research is limited but suggests similar mechanisms to human exposure. Most household pets are at lower risk than humans on lower floors.
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.
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