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Radon Levels in Tyrrell County, North Carolina

EPA puts Tyrrell County in Zone 3, its lowest radon zone, and only 1 radon test from it is on file with CDC (2008 to 2017, laboratory totals). 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

  • Nearest county

    26.8%

    Dare County, 23 miles

    Dare
    26.8%
    NC
    22.6%

    Share at 4+ pCi/L, 41 tests, 2008 to 2017

  • Ground above low

    None

    34.2 pts below NC

    Tyrrell
    0.0%
    NC
    34.2%

    Share of land USGS rates moderate or high potential

  • Tests reported

    2

    Too few for a share

    Tyrrell
    2
    Needed
    30

    2007 to 2016, laboratory

  • EPA radon zone

    Zone 3

    Lower potential

    1. 1
    2. 2
    3. Zone 3

    1 highest, 3 lowest

    EPA predicts under 2 pCi/L indoors

Read a result for Tyrrell County

Starts at EPA's action level

4.0pCi/L

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

EPA’s reading of 4.0 pCi/L

At or above 4 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 at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher.

Interpret this readingWhat a fix costs

The data

Tyrrell County, At a glance

Tyrrell County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Tyrrell County as a whole is an average indoor of less than 2 pCi/L (less than 75 Bq/m³). A low zone clears no address in it: homes above EPA's turn up in all three zones.

USGS geologic potential: Low across 96% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Tyrrell County, 2008 to 2017, laboratory

CDC holds 1 reported test for Tyrrell County over the 2008 to 2017 laboratory totals, a result of 0.1 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Tyrrell County beside the counties around it is how this page reads it.

What these figures count

Only 1 test was reported to CDC for Tyrrell County over 2008 to 2017 (laboratory totals), and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor this house.

Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).

How to read these figures

Tyrrell County, Compared

Tyrrell County radon figures, compared

Calculated by Radon411

CDC's largest figure for Tyrrell County rests on 2 tests over the 2007 to 2016 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 50.0 points and no rank or comparison is drawn from it. Results reached as high as 0.1 pCi/L, with a middle value of 0.1 pCi/L.

The nearest counties with a figure are Dare County (23 miles away) at 26.8%, Pitt County (67 miles away) at 1.0% and Craven County (69 miles away) at 0.0%. Pooled across 99 North Carolina counties, 22.6% of reported tests reached that level; across every county in the country with a figure, 35.7%.

Statewide for the same period, Transylvania County reported the highest share (47.8%) and Nash County the lowest (0.0%). EPA's 1993 map puts Tyrrell County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 96% of the county's land low radon potential.

North Carolina, the United States and the counties around Tyrrell County, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedian
North Carolina, pooled99 counties, pooled73,13922.6%Not pooled
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled
Transylvania Countyhighest in the state3,86247.8%3.7 pCi/L
Nash Countylowest in the state300.0%0.2 pCi/L
Washington County, NCborders it10.0%0.1 pCi/L
Hyde County, NCborders it40.0%0.1 pCi/L
The nearest North Carolina counties to Tyrrell County with 30 or more tests, 2008 to 2017, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Dare County23 mi4126.8%0.1 pCi/L
Pitt County67 mi1011.0%0.1 pCi/L
Craven County69 mi1090.0%0.2 pCi/L
Carteret County72 mi410.0%0.1 pCi/L
Northampton County78 mi6240.3%3.4 pCi/L
Halifax County86 mi5942.4%2.6 pCi/L
Nash County100 mi300.0%0.2 pCi/L
Onslow County102 mi1882.7%0.5 pCi/L
Tyrrell County ten-year laboratory totals, against North Carolina's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestNorth Carolina, pooledChange from the row before
2008 to 201710.0%0.1 pCi/L0.1 pCi/L22.6%Level
2007 to 201620.0%0.1 pCi/L0.1 pCi/L23.2%Level
2006 to 201520.0%0.1 pCi/L0.1 pCi/L24.1%Level
2005 to 201420.0%0.1 pCi/L0.1 pCi/L24.0%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Tyrrell County, Geology

The ground under Tyrrell County

Predicted

USGS's geologic map puts all of Tyrrell County's mapped land in one class: low radon potential. 95.8% of it lies in the area the map calls Outer Coastal Plain, to which USGS gives a radon index of 7, in the low band (5 to 8).

USGS's geologic areas under Tyrrell County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Outer Coastal PlainUnconsolidated sand.Low795.8%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Tyrrell County beside the ground around it

Across North Carolina 1.3% of the land is rated high; none of Tyrrell County's is. None of the 2 counties that border it has any moderate-potential ground either.

Share of land by USGS radon potential: Tyrrell County, the 2 counties bordering it and North Carolina
AreaEPA zoneLow potentialModerate potentialHigh potential
Tyrrell CountyZone 395.8%NoneNone
Hyde CountyZone 396.1%NoneNone
Washington CountyZone 399.9%NoneNone
North Carolina100 counties, pooled by land areaVaries64.8%33.0%1.3%

The map rates the ground, not the air in any home.

Local help

Tyrrell County, Local resources

Radon testing and mitigation in Tyrrell County

What North Carolina's program says
Licensing of radon professionals
The North Carolina Radon Program is presently developing a Radon Proficiency Program as directed by Session Law 2023-91 House Bill 782 .

What it means

Tyrrell County, Questions

Questions about radon in Tyrrell County

Are radon levels high in Tyrrell County?

Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Tyrrell County, North Carolina were at or above 4 pCi/L, and the median reported pre-mitigation result was 0.1 pCi/L. Of the 8 nearest counties with a figure, within 102 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 42.4%.

Which counties border Tyrrell County?

Tyrrell County borders 2 counties: Hyde County and Washington County.

Products

Tyrrell County, Products

Testing a home in Tyrrell County

No CDC figure names Tyrrell County; the nearest county with one, Dare County (23 miles away), reported 26.8% of its tests at or above 4 pCi/L over the 2008 to 2017 laboratory totals, the only reading nearby until a test of this home. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in Tyrrell County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Tyrrell County homes, compared

Explore

Tyrrell County, Bordering counties

Counties bordering Tyrrell County

Calculated by Radon411

Tyrrell County, Cities and towns

Cities and towns in Tyrrell County

Tyrrell County is growing: the Census Bureau puts it at 3,537 residents on July 1, 2025, up 9.3% from 3,237 in 2020. Spread over its land, that is 9.1 people to the square mile. Columbia, its one incorporated place, has 613 residents, 17.3% of the total. Reported testing is thin here: 2 tests over 2007 to 2016, or 0.6 for every 1,000 residents (2025 estimate), where North Carolina as a whole comes to 6.3.

Columbia is the one incorporated place here; CDC publishes no figure by town, so it reads Tyrrell County's.

Columbia, Tyrrell County: residents on July 1, 2025
PlaceResidentsSince 2020Share of residents
Columbia613+0.2%17.3%

One incorporated place, as listed in the U.S. Census Bureau’s 2020 place reference files. Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).

Tyrrell County, Homes

Homes in Tyrrell County

Of Tyrrell County's 2,004 homes, 60% are detached houses, against 65% across North Carolina; 34% are mobile homes. Half of its homes were built before 1983, close to North Carolina's 1990: 24% date from before 1960 and 27% from 2000 or later. Owners live in 79% of the occupied homes (North Carolina: 66%), so for most households a test and a fix are their own to order.

Homes in Tyrrell County, North Carolina, 2019 to 2023
HomesTyrrell CountyNorth Carolina
Housing units2,0044,815,195
Detached houses60%65%
In buildings of 5 or moreunder 1%14%
Mobile homes34%11%
Built before 196024%14%
Built since 200027%33%
Middle year built19831990
Owner-occupied79%66%

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