Why Minnesota is a high-radon state, how testing works, and what mitigation involves. This guide is written for Minnesota homes by Closer Look Inspectors.
Minnesota's radon risk
Radon is a colorless, odorless radioactive gas, and the Minnesota Department of Health reports the average radon level in Minnesota is more than three times the U.S. level — and more than two in five Minnesota homes have radon levels that pose a significant health risk. Long-term exposure raises health risk, which is why testing is strongly recommended at purchase.
How testing works
We place an EPA-protocol continuous monitor on the lowest livable level under closed-house conditions for a minimum of 48 hours, then deliver the reading with your report. It is objective, documented, and useful in negotiation.
If radon is high
Most homes mitigate effectively with a professionally installed sub-slab depressurization system that vents soil gas above the roofline. Elevated results are a solvable problem, not a deal-killer.
Quick checklist
- Minnesota is a high-radon state
- Test on the lowest livable level
- 48-hour minimum, closed-house
- Mitigation is effective and routine
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