A bill for an act concerning radon testing in rental properties.

HF 377 requires landlords in Iowa to address elevated radon levels in rental properties. Tenants can test for radon (using a certified professional) and must notify landlords if levels reach 4 parts per billion (the EPA action level). If confirmed high, landlords must install a radon mitigation system within 90 days and retest, providing results to tenants. If landlords fail to install the system or radon remains high after installation, tenants can terminate their lease with full refunds of prepaid rent and security deposits, without penalties. This bill directly affects renters and landlords in Iowa rental housing.