EPA radon potential
Predicted countywide average below 2 pCi/L. This designation does not replace a test.
The bottom line
Test the house, not the county label.
EPA’s Zone 3 designation predicts a countywide average below 2 pCi/L. The Tennessee dashboard’s Crockett tooltip averaged 0.9 pCi/L for its 2022–2023 records, but median and maximum values could not be read. Elevated homes occur in every EPA zone.
pCi/L dashboard average
Confirmed twice from the Crockett-labeled tooltip. Median and maximum were unreadable.
Certified pros based in-county
No NRPP- or NRSB-listed professional was found in Crockett County.
Risk profile
One verified average—with important limits.
The EPA map estimates potential. The state dashboard summarizes reported test events. Neither predicts a specific address.
Crockett County is EPA Radon Zone 3.
Zone 3 means predicted average indoor levels below 2 pCi/L. Neighboring Dyer, Madison, Gibson, Haywood, Lauderdale, Chester and Henderson counties are also listed as Zone 3.
The only confirmed Crockett County dashboard figure.
The tooltip identified “County: Crockett” and displayed this average on two checks on October 16, 2026. Median and maximum labels appeared without readable values, so they are not reported here.
Do not overread 0.9: the workbook covers 2022–2023, offers no CSV export, and does not expose a Crockett test count. Neighboring Dyer and Lauderdale displayed “No Events.”
The lower charts are health-region aggregates.
The pre- and post-mitigation band charts display health-region rows. Selecting a county filters those charts to its region; Crockett sits in the West Region. The charts cannot support a Crockett-specific test count or percentage above 4 pCi/L.
Building codes
Alamo is clear. The rest of the county is an enforcement gap.
Alamo publishes an explicit appendix list. Bells, Maury City and the unincorporated county are absent from the state’s permit-required list.
2018 IRC; no Appendix F
- Ordinance #2023-2, passed June 2023.
- Appendices A, B, C, D, E, G, H, J, K, M, N, O, P, Q, R, S and T are named.
- Appendix F, Radon Control Methods, is not adopted.
Result: radon-resistant new construction is optional in Alamo.
2018 IRC; Appendix Q only
- Tennessee’s residential rule adopts the 2018 IRC with Appendix Q.
- Appendix F is not part of the state adoption.
- Even where state enforcement applies, the radon appendix does not.
No current local IRC found
- Bells’ MTAS Title 12 is reserved for future use and is dated 2003.
- Maury City’s 1997 posting covers mobile homes only.
- Newer ordinances may exist; city-recorder confirmation is needed.
Not on the state permit list
- Crockett County, Bells and Maury City do not appear on the SFMO permit-required lists.
- This is consistent with opt-out status.
- The specific opt-out resolutions and dates were not found online.
The appendix list—not the IRC edition alone—decides the radon mandate.
Alamo Title 12 ↗ · Bells Title 12 ↗ · Maury City Title 4 ↗ · State residential rule ↗ · State permit jurisdictions ↗
For homebuyers
“Unknown” is not a test result.
Tennessee’s standard disclosure form asks whether the seller knows of radon gas. It does not establish that the property was tested.
Add radon to the inspection contingency.
Ask for a test result tied to the property. A blank or “unknown” disclosure is not evidence of a low reading.
Test new homes, too.
No jurisdiction in Crockett County requires the radon appendix. Ask the builder whether a passive radon rough-in or other voluntary radon-resistant feature was installed.
Choose the right testing route.
TDEC offers one free radon test kit per Tennessee household. For a transaction, compare the timeline and chain-of-custody needs with a credentialed professional.
Verify professional credentials.
No credentialed provider was based locally in the October 16 directory checks, so confirm current NRPP or NRSB status before booking a traveler.
Tennessee property disclosure form ↗ · Request a TDEC free test kit ↗
New construction is a small but unprotected slice of the market.
Census QuickFacts reports 25 building permits in 2025, 6,215 housing units, a 71.6% owner-occupied rate, a $158,900 median owner-occupied value and $857 median gross rent. The population moved from 13,911 in the 2020 Census to an estimated 14,006 in July 2025, a 0.7% increase.
How do I find a certified radon professional in Crockett 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.
Answers in brief
Crockett County radon FAQ
Is Crockett County in a high-radon area?
Crockett County is listed as Zone 3, indicating predicted average indoor radon below 2 pCi/L. Elevated homes still occur in every zone, so only a test can determine a home’s level.
What did the Tennessee dashboard show?
The Crockett-labeled tooltip showed a 0.9 pCi/L average on two checks on October 16, 2026. Median and maximum values were not readable and are not reported.
Is radon-resistant construction required?
No. Alamo’s 2018 IRC ordinance omits Appendix F, and Tennessee’s state baseline adopts Appendix Q only. The county, Bells and Maury City are absent from the state permit-required lists, though their specific opt-out records remain unverified.
Should a new home be tested?
Yes. No jurisdiction requires radon-resistant construction, and a test measures the home itself.
Are local certified testers available?
No NRPP- or NRSB-listed professional was based in Crockett County on October 16, 2026. The nearest NRPP listings were in the Memphis area, roughly 56 to 63 miles from Alamo.
Can I get a free test kit?
TDEC offers one free radon test kit per Tennessee household through its online request page.
Research trail
Primary and supporting sources
Dashboard, jurisdiction and professional-directory observations were checked October 16, 2026. Unresolved records are identified above.
- Alamo Municipal Code, Title 12 — 2018 IRC, Ordinance #2023-2 and appendix list.
- Bells Municipal Code, Title 12 — reserved for future use.
- Maury City Municipal Code, Title 4 — mobile-home chapter only.
- TN Rule 0780-02-23 — 2018 IRC and Appendix Q adoption.
- TN State Fire Marshal residential permits — program scope.
- State permit-required jurisdiction list.
- Tennessee Radon Testing dashboard — two Crockett tooltip observations.
- EPA Map of Radon Zones — map purpose and limitations.
- EPA Map of Radon Zones: Tennessee — Crockett Zone 3.
- NRPP professional directory — Alamo, Jackson and Dyersburg area searches.
- NRSB professional finder — Tennessee statewide search.
- TN REALTORS® Residential Property Condition Disclosure RF 201 — radon named as an environmental hazard.
- Census QuickFacts: Crockett County — population, housing and permits.
- TDEC Radon Program — one free kit per household.
- T.C.A. § 49-2-121 — school indoor-air testing is encouraged, not required.