05/21/2026
This is a good thing but just to be clear, this only requires that a new home be constructed with a passive mitigation system, basically all the piping without the fan that actually creates the negative pressure under the foundation to remove the majority of the radon gas before it enters the home. If you have high levels of radon this passive system won’t move the needle much on lowering the level BUT “activating” the system with a fan installation is much easier and much less costly than having a full mitigation system installed. Bottom line, you should still test your home even if it has a passive system.
Gov. Kim Reynolds signed a bill Tuesday requiring radon mitigation systems in all newly built Iowa homes, a measure that passed with near-unanimous bipartisan support and takes effect July 1. Read more: https://www.kcrg.com/2026/05/19/gov-reynolds-signs-bill-requiring-radon-mitigation-all-new-iowa-homes/