Radon Level 6.4 - Future Primary Residence

[Muks M.]

Would you be concerned if the radon levels comes out to be 6.4 in two days test. This test was performed at our future primary residence where we got a pretty good deal. Given other general inspections are OK and radon was the only thing which appeared to me as the biggest negative so doing my due diligence before my inspection contingency expire today. That zipcode has average level of 4.7 in the basement. The seller is ready to put mitigation plan in place and provide the reading before closing.

What I learnt in my research with 6-8 hr reading (WHO and EPA publications and general reading on Web) is that ‘it should not be a concern at all’ if the level come under 4 as a result of mitigation plan. My home inspector said the same; obviously fan charges etc would be there for me to incur for long term but my inspector said that will be negligible (any idea how much/yr ?).

Just wanted to hear people opinion if RADON would have been a DEAL BREAKER for them if they were to live in that home with their family/kids ?