These maps show estimates for radon levels in indoor air in Colorado counties based
on three different sources.
Figure 1 shows an EPA model that predicts high levels of radon in indoor
air across the state.
Figures 2 and 3, based on results of indoor air radon tests collected from
2005-2009 and voluntarily reported to the Colorado Department of Public Health and
Environment (CDPHE), also show high levels of radon across the state. Several counties
had higher levels of radon on average than predicted by the EPA model, but the number
of home tests was low in some of these counties. A small number of tests may not
accurately represent the entire county.
Figure 4 shows counties where Colorado residents responding to the 2009 Behavioral
Risk Factor Surveillance System (BRFSS) random telephone survey were less likely
to report awareness of a high radon test result in their home. This finding was
in contrast to test results reported to CDPHE which indicate a high percentage of
high radon levels for most Colorado counties.
The chart is at the bottom of this page, Figure 5, shows the 2009 BRFSS results
for the question, “Do you know what radon is?” Results indicate disparities
in awareness based on age, gender, education level, income, race and ethnicity.
It is important that all Colorado residents test their homes for radon. Testing
provides residents with information about radon levels in their home, and it also
adds to the CDPHE radon dataset presented here to help give a better understanding
of radon levels in the state.
Homeowners need to be educated about the need to test their homes for radon and
about what actions are appropriate based on their radon test levels. Information
should be developed for specific target audiences who currently have low awareness
of radon risk.