1.3
Average pCi/L
Coffee County tooltip, live-checked October 15, 2026
01
What the evidence says
Coffee County is EPA Zone 2, indicating moderate radon potential. Its published 2022–2023 dashboard readings are 1.3 pCi/L average and 0.6 pCi/L median—but without a county sample size, those values cannot carry the weight of a home-level decision. EPA Map of Radon Zones: Tennessee DASHBOARD
0.6
Median pCi/L
Same dashboard tooltip; no sample count shown
—
Maximum unavailable
The label rendered, but no value did. The earlier 1.7 transcription is not confirmed.
!The dashboard’s pre- and post-mitigation band charts switch to the South Central Region when Coffee County is selected. Those charts are regional—not county-level—and should not be used for county counts or percentages.
02
Three jurisdictions, the same gap
Unincorporated Coffee County, Manchester, and Tullahoma all enforce the 2018 IRC. None has adopted Appendix F, the edition’s radon-control appendix. Select a jurisdiction for the exact record.
Coffee County Codes Compliance
2018 IRC2009 IECCAppendix F not named
The county’s inspection sheet says all work must comply with the 2018 IRC, 2018 lumber span charts, and 2009 IECC. It names no radon appendix, so radon-resistant construction is optional. The adopting ordinance or resolution number and effective date are not published online. COUNTY SOURCE
City of Manchester
2018 IRCOrdinance 1617Appendices J + Q onlyAppendix F omitted
Municipal Code §12-101 adopts the 2018 IRC with Appendices J and Q only. Because Appendix F is absent from that list, radon-resistant construction is optional. MTAS dates the ordinance to June 2021; the original city-hosted PDF is now unavailable, so the exact passage and effective dates remain open. CODE SOURCE
City of Tullahoma
2018 IRCOrdinance 1607Final reading Nov. 13, 2023No appendix adopted
Tullahoma runs its own code program. Ordinance 1607 changed Title 12’s code editions to 2018; its residential amendment deletes specified fire-sprinkler provisions but names no IRC appendix. Appendix F therefore does not apply. The ordinance takes effect after passage and newspaper publication; that publication date was not verified. ORDINANCE MINUTES
iNo Coffee County, Manchester, or Tullahoma rule was found requiring radon testing in local public buildings, schools, or residential transactions. Tennessee school policy encourages testing but does not mandate it. SCHOOL POLICY REVIEW
How do I find a certified radon professional in Coffee 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.
03
The homebuyer window
62,419
estimated population, July 1, 2025
+7.9%
since the April 2020 base
545
building permits in 2025
Source: U.S. Census QuickFacts
Where radon enters the transaction
Tennessee’s standard residential sale does not automatically create a radon test. The state disclosure form advises buyers to use inspection contingencies for radon and other conditions, while a seller can choose a statutory disclaimer with no representations or warranties. RF 201
- Offer writtenInclude radon in the inspection contingency rather than assuming a disclosure will answer it.
- Inspection windowUse a certified measurement professional and follow closed-building test conditions.
- Result interpretedMake the decision from the home’s measurement, not Coffee County’s fragile average.
- New build closedConfirm whether radon features were installed voluntarily, then test after construction.
iTullahoma crosses the county line. Homes in the Franklin County portion are in EPA Zone 3, while the Coffee County portion is Zone 2. Always match the address to its county before using a county-level designation.
04
Radon testing resources
A county average cannot tell you what is happening in one house. Test the home, know who to call, and act on the result.
Test your home
- Free test kit from TDECTennessee’s radon program
- Buy a kit by phone: 1-800-SOS-RADON (1-800-767-7236)
- Live help with your questions: 1-800-55RADON (1-800-557-2366)
- Find a certified pro: NRPP 800-269-4174 · NRSB 866-329-3474
If your result comes back high
1-800-644-6999 — the Fix-It Hotline, for general guidance on lowering radon in your home.
Hotline information: U.S. EPA and CDCLearn more
Why it matters
- Radon causes about 21,000 U.S. lung cancer deaths a year — the second-leading cause overall and the number-one cause among people who never smoked.
- Smoking plus radon raises the risk roughly ~9×.
- About 1 in 15 homes has high radon.
- Retest at least every 2 years if you have a mitigation system, and after renovations or changes to how you use the lowest floor. EPA recommends taking action at 4 pCi/L and considering it between 2 and 4 pCi/L .
05