Local testing decision
Radon Testing in Jefferson County, OR
Jefferson County has a lower county-level measured signal, but the page should still send homeowners to a direct test because individual homes can sit above the county pattern.
Direct answer
Jefferson County looks lower at county level, but the home still needs its own number.
Jefferson County has a lower measured county signal, but the page should still push direct testing because individual homes can sit above the county pattern.
Evidence
National tracking data
Primary signal
0.7 pCi/L
Reported tests
7 over 10 years
What this evidence can and cannot tell you
Jefferson County, OR has more than the EPA map: CDC Tracking Network exposes 7 reported tests, 0.7 pCi/L county average, 0.6 pCi/L median, 0.0% of reported tests at or above 4.0 pCi/L, and 1.4 pCi/L high-end signal for 2008-2017.
Jefferson County, OR is measurement-backed for 2008-2017. The measured average is 0.7 pCi/L, and 0.0% of reported results are at or above 4.0 pCi/L. The high-end signal reaches 1.4 pCi/L.
Your next test decision
No reading yet: start with a test kit; the county data is context, not a substitute for the home result.
Retest trigger: a 2.0-3.9 pCi/L result can be watched or confirmed, while a 4.0+ result should still override the lower county pattern.
Move from a test result to a local plan
Use the result band, foundation type, and county cost range together. A county signal is context; the home's own test controls the decision.
Sources