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Radon in Chattanooga, Tennessee

EPA puts Hamilton County, where Chattanooga is, in Zone 2, its middle radon zone, and most reported tests there come back low, though 2.4% of 169 (2023) reached 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    2.4%

    22.5 pts below TN

    Hamilton
    2.4%
    Tennessee
    24.9%

    Hamilton, 15th of 15 in TN, 2023

  • Median result

    0.7pCi/L

    Below action level

    Hamilton
    0.7 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of Hamilton's tests, 2023

  • Nearest county

    25.7%

    Bradley, 17 miles

    Bradley
    25.7%
    Hamilton
    2.4%

    105 tests, 2023

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    Hamilton, where Chattanooga is

  • Tests reported

    169

    In Hamilton

    Hamilton
    169
    Bradley
    105

    Reported to CDC before any fix, 2023

Read a result for Chattanooga

Starts at Hamilton County's median, 0.7 pCi/L

0.7pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 0.7 pCi/L

Below 2 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 4 and aboveEPA says fix it

This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Hamilton County's median reported result, 2023.

Interpret this reading

The data

Chattanooga, What is published

What is published for Chattanooga

Information:

Every figure for Chattanooga is a county's

Radon data is published by county, not by city, so for Chattanooga it is Hamilton County's: its EPA zone (Zone 2) and the 169 tests reported to CDC for 2023. Only a test tells you about one home.

About 194,144 people live in Chattanooga.

Chattanooga, Counties

The county Chattanooga lies in

Measured

Hamilton County's EPA zone and the figures CDC publishes for it, 2023.

Hamilton CountyZone 2Moderate predicted potential

2.4%
Reported tests at or above 4 pCi/L
0.7 pCi/L
Median reported result
169 tests
Tests reported to CDC
2
Annual years on file

Hamilton County ranks 15th of 15 Tennessee counties with 30 or more tests for that period, 22.5 points below the 24.9% pooled across Tennessee's counties, 31.0 points below the national pool of 33.4%.

Around Hamilton County, the county Chattanooga lies in, the nearest counties with a CDC figure for 2023 are Bradley County (17 miles, 25.7% of 105 tests), Loudon County (61 miles, 40.2% of 82 tests) and Blount County (78 miles, 50.0% of 46 tests). Across the 8 nearest, the share at or above 4 pCi/L runs from 2.4% to 50.0%; the farthest of them, Williamson County, is 109 miles away at 16.5%.

No business in the directory gives Chattanooga as its address; the Tennessee list covers it. Tennessee's other cities with a page of their own: Nashville, Knoxville, Cleveland and Johnson City.

The counties around Chattanooga

By distance from Hamilton County; counties with 30 or more tests.

Nearest counties to Hamilton County with 30 or more tests
CountyDistanceTestsAt or above 4 pCi/LMedian
Bradley County17 mi10525.7%2.2 pCi/L
Loudon County61 mi8240.2%3.0 pCi/L
Blount County78 mi4650.0%3.9 pCi/L
Rutherford County84 mi5020.0%1.6 pCi/L
Anderson County84 mi3716.2%1.4 pCi/L
Knox County89 mi20317.7%1.8 pCi/L
Wilson County93 mi822.4%0.9 pCi/L
Williamson County109 mi11516.5%1.3 pCi/L

Predicted: EPA Map of Radon Zones, by county. Measured: CDC tracking data, by county, 2023.

Chattanooga, Homes

Homes in Chattanooga

Of Chattanooga's 87,138 homes, 58% are detached houses, against 68% across Hamilton County; 26% are in buildings of five or more homes. Half of its homes were built before 1975, close to Hamilton County's 1980: 30% date from before 1960 and 25% from 2000 or later. 53% of occupied homes are lived in by their owner (Hamilton County: 64%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Chattanooga, Hamilton County, Tennessee, 2019 to 2023
HomesChattanoogaHamilton CountyTennessee
Housing units87,138165,6053,095,472
Detached houses58%68%68%
In buildings of 5 or more26%17%14%
Mobile homes1%3%8%
Built before 196030%24%18%
Built since 200025%27%29%
Middle year built197519801986
Owner-occupied53%64%67%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.

Local help

Chattanooga, Local resources

Local resources for Chattanooga

Who to ask in Tennessee: its radon program, test kits and professionals.

The program's own words on licensing are on the Tennessee page.

What it means

Chattanooga, Questions

Questions about radon in Chattanooga

What radon zone is Chattanooga in?

Chattanooga has no zone of its own: it shares Hamilton County's, Zone 2, the map's middle class: a predicted county average of 2 to 4 pCi/L.

What are radon levels in Chattanooga?

Reported levels around Chattanooga run low: 2.4% of 169 tests from Hamilton County for 2023 reached 4 pCi/L. The median reported result was 0.7 pCi/L. Low is not none.

Should I test my home in Chattanooga?

Yes, even here. Hamilton County reported 4 of 169 tests at or above 4 pCi/L. That is below Tennessee's pooled 24.9%, and still not a reason to skip it, and ranks Hamilton County 15th of the 15 Tennessee counties with 30 or more tests. Testing found those homes; the county's low share did not. How to test a home.

Is radon higher in the counties around Chattanooga?

Higher, in every direction measured: all 8 of the nearest counties with a figure report a larger share of high tests than Hamilton County's 2.4%, up to Blount County (50.0%, 78 miles off).

The answers use the published figures of Hamilton County, the county Chattanooga lies in.

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