Unincorporated
Opted outNo residential IRC is enforced through the state program, so no radon appendix applies. The current opt-out resolution and renewal date were not verified. [3]
Morgan County, Tennessee · Radon field guide
Morgan County, TN radon Low-zone label. No code safety net.
Morgan County is EPA Zone 3, yet that countywide prediction cannot clear a single house. With no verified radon-building mandate and no certified tester based in the county, every home needs its own answer.
Radon in Morgan County, Tennessee: quick answers
EPA zone: Zone 3Region: East TennesseeState test data: State test figures couldn't be confirmed, so they aren't shown
Is radon a problem in Morgan County, Tennessee?
It can be. Morgan County is in EPA Zone 3, the lowest predicted radon-potential category (below 2 pCi/L on average). Homes with high radon are still found in Zone 3, and the Tennessee Radon Program has found homes needing action in every Tennessee county, so test to know your home's level.
Do new homes in Morgan County, TN have to be built radon-resistant?
Effectively no. Unincorporated Morgan County opted out of state inspections, and Harriman's code includes the radon appendix without saying where it applies. Local code details
How do I test my home for radon in Morgan County?
Order a free short-term kit from the Tennessee Radon Program online or by calling 1-800-232-1139. Place it on the lowest lived-in floor, about 3 feet off the floor, for 3 to 5 days, then mail it back right away. How to test your home
What radon level means I should fix my home?
EPA recommends fixing your home if radon is 4 pCi/L or higher, and considering a fix between 2 and 4 pCi/L. Confirm a high short-term result with a second test first. What your result means
Who can test or fix radon in Morgan County?
Tennessee doesn't license radon professionals, so look for NRPP or NRSB certification. Search both national directories by ZIP code; certified professionals often serve Morgan County from nearby cities. How to choose a radon professional
01 / CODES
No countywide radon mandate
Residential enforcement changes from one jurisdiction to the next.
Radon-resistant new construction is effectively optional across Morgan County.
Unincorporated areas opted out of state residential inspection. Harriman adopted the 2018 IRC with Appendix F, but the local code does not designate where the appendix's radon techniques are required. [1] [2]
Opt-out status means the State Fire Marshal does not permit or inspect one- and two-family residential construction there. It does not eliminate separate electrical or septic requirements. The cited jurisdiction table lists Morgan County, Wartburg, and Oakdale as OPT OUT; Sunbright is listed under the state residential program. [3] [5]
Wartburg
Own code unknownWartburg is listed as opted out of state enforcement. Whether it adopted and actively enforces its own municipal residential code could not be verified. [3]
Harriman
2018 IRC + Appendix F§12-401 adopts the 2018 IRC and expressly includes appendices “A, B, C, F, G, H, J, L, N, P, Q, R, S and T” under Ordinance #1218-02, January 2019. Appendix F is Radon Control Methods, but its techniques apply where the jurisdiction designates them; no Harriman designation was found. Enforcement practice is not yet confirmed. [1] [2]
Sunbright
State programSunbright is listed as SRBP, where the State Fire Marshal enforces Tennessee's statewide 2018 IRC. The research did not establish a local radon mandate. [3] [5]
Oakdale
Opted outOakdale is listed as OPT OUT in the same jurisdiction table. A separate local residential code was not established in this review. [3]
02 / RISK
Zone 3 is not a test result
The state dashboard would not yield a defensible Morgan County reading.
Morgan County is EPA Zone 3: predicted average indoor radon below 2 pCi/L. EPA cautions that its map is not meant to decide whether a specific home should be tested; elevated homes occur in every zone. [6] [7]
<2
pCi/L predicted county average
A planning map cannot measure your basement, crawlspace, slab, utility penetrations, or lowest lived-in level.
Morgan County dashboard values: withheld
One hover labeled “County: Morgan” showed an impossible combination—average 23.2, median 0.6, maximum 3.3 pCi/L—so the values are not published. Four attempts after reload landed on neighboring counties. The pre/post charts show East Region aggregates, not Morgan County counts. Open the state dashboard. [8]
These nearby readings were captured with their county labels confirmed. They show why neither Zone 3 nor a neighboring value should stand in for a Morgan County home test. [8]
Roane
2.3 avg
1.6 median · 8.4 max pCi/L
Anderson
2.1 avg
1.4 median · 6.2 max pCi/L
Loudon
4.7 avg
2.3 median · 19.4 max pCi/L
How do I find a certified radon professional in Morgan 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 / BUYERS
Test the house, not the map
Code status and disclosure practice both place the decision on the buyer.
Tennessee's property-disclosure form advises buyers to include a radon inspection contingency; it does not create a mandatory radon test. Sellers disclose known material defects in good faith, but a seller who has never tested may have nothing radon-specific to report. [11]
No Morgan County-specific rule for radon in public buildings, schools, or real-estate transactions was found. Tennessee encourages school testing rather than requiring it; a 2025 bill proposing annual school indoor-air inspections that include radon remained unverified as enacted and is not treated here as law. [12] [13]
- Put radon in the inspection contingencyA disclosure reflects what the seller knows. A properly run test measures what the house is doing during the test period.
- Do not treat “new” as “radon-ready”No mandatory radon-resistant new-construction rule was verified. Ask the builder what was installed and request documentation.
- Test the lowest occupiable levelBasements, slabs, crawlspace interfaces, utility penetrations, and future finished lower levels deserve special attention.
- Verify a current credentialCheck the NRPP or NRSB directory before hiring and ask about travel charges. [9]
- Use the free-kit route if timing allowsTDEC's Radon Program offers free test kits to Tennessee homeowners. [14]
04 / FAQ
Fast answers
What the evidence does—and does not—support.
Does Zone 3 mean my Morgan County home is safe?
No. Zone 3 predicts a lower county average; it does not measure an individual property. EPA says elevated homes occur in every zone. [6]
Is radon-resistant construction required in new homes?
No countywide mandate was verified. The county opted out of state residential enforcement. Harriman adopted Appendix F, but no jurisdictional designation making its methods mandatory was found; actual inspection practice remains an open question.
What were Morgan County's 2022–2023 dashboard readings?
No defensible average, median, or maximum could be established. The only labeled capture was mathematically inconsistent, so this guide withholds all three. [8]
Are certified radon testers based in Morgan County?
The October 16, 2026 NRPP and NRSB directory searches showed zero measurement professionals based in Morgan County. The nearest directory results were in Oak Ridge. [9] [10]
Does Harriman's Appendix F adoption guarantee a radon system?
Not on the published text alone. Harriman included Appendix F, but the appendix applies its techniques where the jurisdiction designates them; no such local designation was found. Confirm current enforcement with the city's codes office. [1] [2]