As many of you may have heard, radon is being linked to increased risk of lung cancer and various other respiratory/cardiovascular problems. Here in Illinois, a radon disclosure sheet is now required in all real estate transactions (like the lead based paint disclosure). We had our house tested today and it measured almost 3 times higher than the normal level. Now I have to pay almost $900 for the radon mitigation system to be installed :confused2: Good to know now rather than later. FYI - around here the test costs $120-$150.