The bottom line
High potential. No radon-ready guarantee.
The EPA places Meigs County in its highest-potential category, with a predicted average indoor level above 4 pCi/L. The state’s 2018 residential code adopts only Appendix Q, not the radon appendix. For a house in Decatur, Ten Mile, Georgetown, or the unincorporated county, a code-compliant new build should not be assumed to include radon-control features.
Zone 1 is a reason to test—not a house result
Two independent zone references place Meigs County in Zone 1, the EPA category for highest predicted radon potential. The designation estimates broad-area potential; only a test answers what is happening in an individual home. EPA Map of Radon Zones: Tennessee
>4 pCi/L predicted average
Meigs also appears in the 2018 IRC radon appendix’s table of high-radon-potential Tennessee counties. That planning classification does not mean every home is elevated—or that any particular home is safe.
The verified code path omits radon
Decatur’s published code contains no local building-code adoption. The older jurisdiction list places both Decatur and the county under the State Residential Building Permit program, but that program status is not yet confirmed.
Town of Decatur
Title 12—“Building, Utility, Etc. Codes”—is reserved for future use. The published municipal code therefore contains no local IRC adoption and no local radon appendix.
The codification warns that later ordinances may not appear; the city recorder’s ordinance book is the check for anything newer. Read Decatur’s municipal code ↗Unincorporated Meigs
A roughly 2011 UT/MTAS list marks both “Meigs County — SRBP” and “Decatur — SRBP,” meaning state residential enforcement. No current 2026 jurisdiction list could be retrieved.
Confirm present status before treating the old jurisdiction list as definitive. View the UT/MTAS status list ↗2018 IRC + Appendix Q
Tennessee’s current residential rule adopts the 2018 IRC and Appendix Q for tiny houses. Appendix F, “Radon Control Methods,” is not among the adopted appendices.
The radon appendix is optional, not mandatory, wherever this state program applies. Read Rule 0780-02-23 ↗Schools, public buildings & sales
No Meigs County- or Decatur-specific radon rule was found. State law encourages—rather than requires—school indoor-air programs to include radon testing.
Tennessee real-estate disclosure asks about radon only to the seller’s actual knowledge; it does not require a test. Read TCA § 49-2-121 ↗The verified state code does not require radon-resistant new construction. Because Meigs and Decatur’s current 2026 state-program status remains unresolved, confirm the permitting authority—but do not let code compliance replace a radon test.
How do I find a certified radon professional in Meigs 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.
Test every transaction—including new builds
A Zone 1 designation, optional radon-resistant construction, rapid growth, and a lake-oriented housing market make testing especially important for buyers who may be unfamiliar with East Tennessee radon risk.
Keep a radon contingency
Use the inspection period to obtain a house-specific result; a seller’s disclosure is not a test or warranty.
Test the lowest lived-in level
Use the level that could be occupied, whether the home is lakefront, a second home, or a primary residence.
Ask what “radon-ready” means
For a new build, request plans and components. Code compliance alone does not prove Appendix F features were installed.
Act at 4 pCi/L or higher
Retest or consider mitigation when a result reaches the EPA action level stated in the research record.
World Population Review reports growth from 12,808 residents in 2020 to an estimated 14,382 in 2026. This secondary-source estimate is directional, not an official Census count. Listings also show riverfront, vacation-oriented, and new-construction property around Watts Bar Lake and the Tennessee River. See the growth source ↗
Free test kit
TDEC runs a voluntary statewide program offering free radon test kits to homeowners.
Request through TDEC ↗State permit program
Review how Tennessee’s residential program applies where a jurisdiction has neither a qualifying local code nor an opt-out.
Read the state program ↗Primary records and live directories
Code, risk, market, and real-estate claims were reviewed against these records. Live directory and dashboard checks were made October 16, 2026.
- Decatur Municipal Code — Change 3, April 9, 2024
- Tennessee Rule 0780-02-23 — One and Two Family Dwellings and Townhouses
- Tennessee State Fire Marshal — Residential Permits
- State inspections in opt-out and non-code jurisdictions
- UT TRACE / MTAS jurisdiction-status list
- EPA Map of Radon Zones
- EPA Map of Radon Zones: Tennessee
- EPA Map of Radon Zones: Tennessee
- Tennessee Radon Testing dashboard
- NRPP professional search for ZIP 37322
- NRSB professional directory
- TDEC Radon Program — free test kits
- TCA § 49-2-121 — school indoor air quality
- Tennessee seller disclosure overview
- World Population Review — fastest-growing Tennessee counties
- Meigs County housing listings
Hero image: Watts Bar Dam and Highway 58, via Tennessee River Valley Geotourism. This guide distinguishes verified text from unresolved 2026 status and does not substitute regional dashboard figures for county measurements.