Every house has some radon, so the question is concentration rather than presence. Below 2.0 pCi/L there is nothing to act on. Above 4.0 the EPA recommends fixing it, and living there normally while the work is scheduled is fine.
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Start with the framing, because "has radon" is true of essentially every building with ground contact. Radon is produced continuously by uranium decaying in soil and rock, it enters through the foundation, and outdoor air carries a small amount as well. The meaningful question is how much. The bands, in plain terms. Under 2.0 pCi/L is around the typical indoor average and there is nothing to act on. Between 2.0 and 4.0 the EPA suggests considering mitigation, which is a genuine judgment call and reasonably influenced by whether anyone in the household smokes and how much time is spent on the lowest level. At or above 4.0, the action level, the recommendation is to fix the home. Above 10, the same recommendation applies with more urgency about scheduling, though still not about evacuation. What "okay to live there" means in practice. It is fine to continue using the house normally while a test is running, while quotes are collected, and while an install is scheduled. Basement bedrooms are worth thinking about if the result is high and the work is weeks out, simply because that is where concentration is highest and where someone spends eight hours a night. Beyond that, no household routine needs to change. Why this is a solvable problem rather than a condition to accept. Central Ohio sits on flat-lying glacial till with dense clay subsoils that drain slowly and perch water above the till rather than letting it through. Much of Greater Columbus and Central Ohio sits in EPA Zone 1, the highest predicted-average zone, so elevated results here are common rather than exceptional. That also means the local trade does this constantly, the standards are mature, and the outcome is predictable: a correctly designed system routinely brings a result in the 6 to 8 range under 2.0 and holds it there. The reasonable posture is neither alarm nor indifference. Test, and if the number is above the action level, put a system in this season. It is a solved engineering problem in this market, and once it is done it stays done.