Orange County NC Website
26 <br /> o 4000 PicoCuries per Liter (pCi/L) for states that have a radon in indoor air <br /> program. <br /> Orange County does not have a radon indoor air program. Of 142 wells tested for radon <br /> in Orange County, 41%contained radon levels in excess of 300 pCi/L.10 <br /> 10 Ibid <br />