Date Published: 05/28/2008 [Source]
Test results for Northwest Colorado counties are showing that approximately 50 percent of our homes have elevated radon levels above the EPA’s action level of 4.0 picocuries per liter.
There are homes in our area with levels of radon as high as 114 pCi/l.
Because indoor radon levels are high throughout most of Colorado, many cities and counties are adopting Appendix F of the International Residential Code, which requires radon control methods in all new construction.