Yes. First get a sensor so you can track it, radon can change quite a bit over time. I bought two from airthings.com. They support IOS, Android, and even hav

Yes. First get a sensor so you can track it, radon can change quite a bit over time. I bought two from airthings.com. They support IOS, Android, and even have an graphana plugin (direct, not requiring upload to a cloud first). They track temp, humidity, VOCs, radon, CO2, and something else I can't remember. They have pretty incredible bluetooth range, it's slow, but I can get an update of both sensors from anywhere in my 3 story house. I'm used to bluetooth only sometimes working when on the same floor. After mapping out my house we saw numbers as high as 15, 4.0 is the recommended mitigation threshold in the USA, 2.6 for the EU. After talking to a company they recommended sealing our sump pump area, and then installing a fan that sucked air from under our foundation. Our readings dropped from 15 to 0.5, and stayed there. I do wonder how long the sump pump sealant will last, but I have the airthings to watch. So sure, open up the windows when you can, but I'm glad I can close the windows when it's smokey or cold and still have low radon levels.