How 0.8 compares
It falls below the 2 pCi/L threshold used in EPA’s Zone 3 definition and well below EPA’s 4.0 pCi/L action level.
00.8 observed2.04.0 action level
What the local data says
The EPA zone map predicts potential; it does not measure any specific house. Tennessee’s 2022–2023 dashboard offers a county tooltip, but its missing fields signal a dataset too thin for confident generalization.
0.8
Observed county average on the Tennessee dashboard
The Sequatchie tooltip showed an average of 0.8 pCi/L on two loads. Median and maximum were blank, and the dashboard provides no county test count or CSV export. Treat this as indicative—not as a robust county baseline.
Do not use the band charts as county counts
The pre- and post-mitigation charts remain grouped by health region. They are regional aggregates, not a Sequatchie County breakdown.
How do I find a certified radon professional in Sequatchie County?
Tennessee doesn't license radon testers or mitigators, so national certification is the best way to check qualifications. The Tennessee Radon Program points residents to two directories: search them by ZIP code and widen the radius if nothing is listed nearby.
We don't recommend or rank companies. Before you hire, check the certification number in the directory yourself and ask for a follow-up test after any system is installed. Questions to ask a radon professional.
A practical buyer’s playbook
Sequatchie County is growing quickly, but absolute new-construction volume remains small: the Census recorded 37 building permits in 2024. Whether the house is old or brand-new, make radon testing part of due diligence.
01
Test every home
EPA says elevated homes occur in all three radon zones. A map cannot clear an individual property.
02
Use the offer contingency
Tennessee’s standard property-condition disclosure asks about radon, but a seller’s disclosure is not a measurement. Add a testing contingency.
03
Ask what “new” includes
Request the permit’s code edition and appendix list. If radon-resistant features are claimed, ask the builder to identify the system and test after occupancy.
04
Use a qualified professional
No certified measurement professional was found based in the county, so expect to contact Chattanooga-area providers or use Tennessee’s homeowner test-kit program.
14.0
A local reminder that Zone 3 can still produce a high reading. RadonResources records one user-submitted Dunlap result at 14.0 pCi/L on June 15, 2021—more than three times EPA’s 4.0 action level.
This single, self-selected submission is not representative of the county; it is evidence about one reported home only.Sources & verification notes
01Tennessee SFMO — Residential Permits
2018 IRC/IECC and the state-permit jurisdiction list; read Oct. 16, 2026.
02SFMO Rule 0780-02-23
State adoption of the 2018 IRC with Appendix Q only.
03Tennessee Radon Testing dashboard
2022–2023 tooltip observation; no downloadable CSV.
04EPA Map of Radon Zones
Zone definitions and the test-every-home caution.
05EPA Map of Radon Zones: Tennessee
Zone 3 context and the caveated 14.0 pCi/L user submission.
06NRPP professional search — 37327
Distance-sorted directory search; read Oct. 16, 2026.
07NRSB Find a Professional
Measurement-specialist searches at 25- and 50-mile radii.
08U.S. Census QuickFacts — Sequatchie County
Population, housing and permit figures.