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Radon Levels in Perquimans County, North Carolina

EPA puts Perquimans County in Zone 3, its lowest radon zone, and only 1 radon test from it is on file with CDC (2014). Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

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  • Nearest county

    26.8%

    Dare County, 47 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

    Perquimans
    0.0%
    NC
    34.2%

    Share of land USGS rates moderate or high potential

  • Tests reported

    5

    Too few for a share

    Perquimans
    5
    Needed
    30

    2008 to 2017, 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 Perquimans 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

Perquimans County, At a glance

Perquimans County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Perquimans 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 98% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Perquimans County, 2014

CDC holds 1 reported test for Perquimans County in 2014, a result of 0.1 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Perquimans County beside the counties around it is how this page reads it.

What these figures count

Only 1 test was reported to CDC for Perquimans County over 2014, 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: 2014. Measured data period: 2005 to 2017 (every CDC figure on file).

How to read these figures

Perquimans County, Compared

Perquimans County radon figures, compared

Calculated by Radon411

CDC's largest figure for Perquimans County rests on 5 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 20.0 points and no rank or comparison is drawn from it. Results reached as high as 1.3 pCi/L, with a middle value of 0.8 pCi/L.

The nearest counties with a figure are Dare County (47 miles away) at 26.8%, Northampton County (55 miles away) at 40.3% and Pitt County (67 miles away) at 1.0%. 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 Perquimans County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 98% of the county's land low radon potential.

North Carolina, the United States and the counties around Perquimans 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
Pasquotank County, NCborders it837.5%0.6 pCi/L
Chowan County, NCborders it90.0%0.1 pCi/L
Gates County, NCborders it10.0%0.1 pCi/L
The nearest North Carolina counties to Perquimans County with 30 or more tests, 2008 to 2017, laboratory
CountyDistanceTestsAt or above 4 pCi/LMedian
Dare County47 mi4126.8%0.1 pCi/L
Northampton County55 mi6240.3%3.4 pCi/L
Pitt County67 mi1011.0%0.1 pCi/L
Halifax County68 mi5942.4%2.6 pCi/L
Craven County83 mi1090.0%0.2 pCi/L
Nash County88 mi300.0%0.2 pCi/L
Warren County94 mi8242.7%3.0 pCi/L
Carteret County95 mi410.0%0.1 pCi/L
Perquimans 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 201750.0%0.8 pCi/L1.3 pCi/L22.6%Level
2007 to 201650.0%0.8 pCi/L1.3 pCi/L23.2%Level
2006 to 201540.0%1.1 pCi/L1.3 pCi/L24.1%Level
2005 to 201440.0%1.1 pCi/L1.3 pCi/L24.0%First on file

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

Perquimans County, Geology

The ground under Perquimans County

Predicted

USGS's geologic map puts all of Perquimans County's mapped land in one class: low radon potential. The map puts 85.8% of Perquimans County in the area it calls Outer Coastal Plain and 12.2% in Inner Coastal Plain. USGS gives the first a radon index of 7 and the second 8, both in the low band (5 to 8).

USGS's geologic areas under Perquimans County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Outer Coastal PlainUnconsolidated sand.Low785.8%
Inner Coastal PlainFossiliferous clay and sand, shelly sand, sandy marl, and limestone.Low812.2%

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

Perquimans County beside the ground around it

Across North Carolina 1.3% of the land is rated high; none of Perquimans County's is. None of the 3 counties that border it has any moderate-potential ground either.

Share of land by USGS radon potential: Perquimans County, the 3 counties bordering it and North Carolina
AreaEPA zoneLow potentialModerate potentialHigh potential
Perquimans CountyZone 398.0%NoneNone
Pasquotank CountyZone 397.5%NoneNone
Chowan CountyZone 397.3%NoneNone
Gates CountyZone 398.9%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

Perquimans County, Local resources

Radon testing and mitigation in Perquimans 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

Perquimans County, Questions

Questions about radon in Perquimans County

Are radon levels high in Perquimans County?

In 2014, 0.0% of the radon tests reported to CDC for Perquimans 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 95 miles, the share of tests at or above 4 pCi/L runs from 0.0% to 42.7%.

Which counties border Perquimans County?

Perquimans County borders 3 counties: Pasquotank County, Chowan County and Gates County.

Products

Perquimans County, Products

Testing a home in Perquimans County

No CDC figure names Perquimans County; the nearest county with one, Dare County (47 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 Perquimans County.

Test kits and monitors3

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Best radon monitors for Perquimans County homes, compared

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Perquimans County, Bordering counties

Counties bordering Perquimans County

Calculated by Radon411

Perquimans County, Cities and towns

Cities and towns in Perquimans County

The Census Bureau estimates 13,490 residents in Perquimans County for July 1, 2025, 466 more than in 2020 (+3.6%). That works out to 55 people per square mile of land. No town dominates: Hertford, the largest, has 2,011 residents, 14.9% of the total. Together its 2 incorporated places hold 19.2% of those residents; the other 80.8% live outside any of them. Reported testing is thin here: 5 tests over 2008 to 2017, or 0.4 for every 1,000 residents (2025 estimate), where North Carolina as a whole comes to 6.5.

From Hertford to Winfall, CDC publishes no figure by town: each reads Perquimans County's.

The cities and towns in Perquimans County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Hertford2,011+3.7%14.9%
Winfall575+4.4%4.3%

2 incorporated places, 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).

Perquimans County, Homes

Homes in Perquimans County

Of Perquimans County's 6,918 homes, 69% are detached houses, against 65% across North Carolina; 25% are mobile homes. Half of its homes were built before 1991, close to North Carolina's 1990: 18% date from before 1960 and 33% from 2000 or later. 73% of occupied homes are lived in by their owner (North Carolina: 66%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Perquimans County, North Carolina, 2019 to 2023
HomesPerquimans CountyNorth Carolina
Housing units6,9184,815,195
Detached houses69%65%
In buildings of 5 or more2%14%
Mobile homes25%11%
Built before 196018%14%
Built since 200033%33%
Middle year built19911990
Owner-occupied73%66%

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