Nashville air, tested & made safe.
Radon from the ground. Mold from damp summers and flood-prone creeks. Talk with a local specialist who knows Nashville homes and get straight answers.
Tap to call a Nashville specialist(615) 364-8354Highest radon potential. EPA predicts a county-average indoor level above 4 pCi/L, the level where EPA says to fix your home.
Why do Nashville homes grow mold?
Our climate does the damage quietly: damp mornings most of the year, plus heavy-rain floods that soak crawl spaces and drywall. Read the Nashville mold guide →
Damp mornings, all year
That's Nashville's average early-morning relative humidity at the airport; by midday it averages 56%. Mornings peak at 89% in August and September. EPA advises keeping indoor humidity below 60% (ideally 30–50%) to stop mold.
The 2010 flood lesson
Rain at Nashville International Airport on May 1–2, 2010, more than double the previous two-day record of 6.68″. The storm killed 18 people in Middle Tennessee, and property damage ran into the billions of dollars.
Source: National Weather Service Nashville; drying window: EPA
Which Nashville neighborhoods do we cover?
From older homes with damp crawl spaces to new builds on slab, radon and mold don't skip a zip code. Neighborhood-by-neighborhood guide →
Neighboring counties & their EPA radon zones
- Williamson CountyBrentwood, FranklinZone 1 · High
- Wilson CountyMt. Juliet, LebanonZone 1 · High
- Rutherford CountyMurfreesboro, SmyrnaZone 1 · High
- Sumner CountyHendersonville, GallatinZone 2 · Moderate
- Cheatham CountyAshland CityZone 2 · Moderate
- Robertson CountySpringfieldZone 2 · Moderate
Zones: U.S. EPA radon zone data. Every home should be tested regardless of zone.
What does it cost, honestly?
These are published national ranges; no Nashville-specific averages are published. Local quotes depend on your foundation, square footage and how far the problem has spread. Full breakdown →
Nashville questions
Is radon really a problem in Nashville?
Davidson County is in EPA Zone 1, the highest-potential group. In a state and EPA screening survey of 245 Davidson County homes, 30% measured above 4 pCi/L. Statewide, about 1 in 4 homes using the free TDEC kit test above that level. Your own test is the only answer for your house. (EPA, USGS, TDEC)
My basement flooded. How fast do I need to act?
Fast. EPA says water-damaged areas and items should be dried within 24 to 48 hours to prevent mold growth. If drywall, carpet or insulation stayed wet longer, get it looked at. (EPA)
How long does radon mitigation take?
EPA says a mitigation system generally takes a day or less to install. Plan a follow-up test afterward: EPA suggests within 30 days, but no sooner than 24 hours after the fan starts. (EPA, EPA)
Should I run a dehumidifier?
Measure first. EPA's target is indoor humidity below 60%, ideally 30 to 50%, and a basic humidity meter costs about $10 to $50. If your basement or crawl space reads high, drying it out is the fix. (EPA)
Sources for this page: U.S. EPA, Map of Radon Zones; EPA radon zone data file, June 2024; EPA, Tennessee Map of Radon Zones (PDF); USGS Open-File Report 93-292-D: Geologic radon potential, Tennessee chapter (1993); Tennessee Department of Environment & Conservation, Radon Program; NOAA NCEI, Comparative Climatic Data: average relative humidity through 2023 (Nashville, 1948–2018); National Weather Service Nashville, The May 2010 Flood; EPA, A Brief Guide to Mold, Moisture and Your Home; EPA, Tribal IAQ Resource Directory: Radon; EPA, Consumer's Guide to Radon Reduction (PDF); HomeAdvisor, radon testing cost (Jun 2026); Angi, radon mitigation cost (Sep 2026); Angi, mold inspection cost (Oct 2026); Angi, mold remediation cost (Jul 2026). Last updated .
Breathe easier in Music City.
Calls are answered by our sponsor, Franklin Environmental Services.