High radon levels in basement
Steps
- Confirm with a second test — a long-term kit over 90 days on the lowest lived-in level, or a continuous monitor — before spending money; single short tests swing with the weather.
+5 more steps in the full guide
Stop and call a pro if
- always for the mitigation system itself: the fan and vent are installed by a certified radon mitigator
Rules in the US: Many states license radon mitigators; the EPA action level is 4 pCi/L, and a mitigation system usually costs $800–$2,500.