Is radon high in Caswell County, North Carolina?

Low. The model predicts a long-term basement average of 1.8 pCi/L in Caswell County (close to the US average of 1.8 and close to the North Carolina average of 1.7). That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Ranked 38 of 100 North Carolina counties.

Should I test for radon in Caswell County?

Yes, once. The EPA recommends testing every home regardless of area, and the model's ZIP-level predictions in Caswell County already range from 1.3 to 2.0 pCi/L. A short-term kit costs little and settles the question for your house.

What does EPA Radon Zone 2 mean for Caswell County?

Zone 2 - moderate potential (2-4 pCi/L). The zone map dates from 1993 and classifies whole counties. The newer model's predicted average of 1.8 pCi/L does not line up with Zone 2, which is common - the EPA itself says high-radon homes exist in every zone. Neither replaces a test of your own home.

How much does radon mitigation cost in Caswell County?

A standard active sub-slab depressurization system typically runs $800-$2,500 installed nationally; North Carolina quotes vary with foundation type (slab, crawlspace, basement), home size and local labor. Get two or three bids from certified mitigators listed by your state radon program or the EPA's find-a-professional page.

Radon levels in Caswell County, North Carolina

LowEPA Zone 2

Predicted long-term basement average of 1.8 pCi/L (model estimate) across 7 ZIP codes - close to the US average of 1.8, close to the North Carolina average of 1.7. Ranked #38 of 100 North Carolina counties.

Test Caswell County, NC once anyway - radon varies house to house

The predicted basement average here is 1.8 pCi/L, below the EPA's 2 pCi/L "consider fixing" threshold. That's good news for the area - but the EPA still recommends every home be tested, because foundation cracks, soil pockets and ventilation make one house very different from its neighbor. One inexpensive kit settles it.

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Predicted (model estimate). The pCi/L figures on this page are long-term area averages from a peer-reviewed national model built on millions of real radon tests (2001-2021). They describe the typical home in this area - not your home, which can be several times higher or lower. The EPA radon zone is a separate, 1993 county-level classification. How the numbers work.

1.8 ± 0.07

pCi/L predicted basement mean (model SD)

1.0 ± 0.07

pCi/L predicted upstairs (above-ground) mean

1.3-2.0

range of ZIP-level basement predictions in the county

What this means for Caswell

The typical Caswell County home is predicted below 2 pCi/L, the lowest band. That is the best case an area can show - but it describes the average house, and the ZIP-level predictions within the county still span 1.3 to 2.0 pCi/L.

Note that the EPA classifies Caswell County as Zone 2 while the newer model predicts 1.8 pCi/L. The zone map predates two decades of test data; where they disagree, we grade on the model but show both. County figures weight each ZIP by its 2010 Census population, so they describe where people live rather than empty land.

Comparable North Carolina counties: Rowan County (1.8), Franklin County (1.8), Vance County (1.8), Davie County (1.7). The state's highest is Transylvania County at 3.6 pCi/L.

ZIP codes in Caswell County

Predicted basement and upstairs means by ZIP (model estimate). ZIPs whose land is mostly in this county.

ZIP	Basement	Upstairs	Grade
27379	1.9 ± 0.07	1.0	Low
27311	1.9 ± 0.06	1.1	Low
27212	1.7 ± 0.06	1.0	Low
27315	1.9 ± 0.06	1.1	Low
27305	2.0 ± 0.07	1.2	Low
27291	1.4 ± 0.08	0.6	Low
27314	1.3 ± 0.08	0.6	Low

If your test comes back at 4 pCi/L or higher

Mitigation is a routine job: a fan-driven pipe that vents soil gas from under the slab to above the roofline, typically $800-$2,500 installed (typical range; local quotes vary). Use certified professionals: EPA find-a-professional. Read the full mitigation guide.

Caswell County radon questions

Is radon high in Caswell County, North Carolina?: Low. The model predicts a long-term basement average of 1.8 pCi/L in Caswell County (close to the US average of 1.8 and close to the North Carolina average of 1.7). That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Ranked 38 of 100 North Carolina counties.
Should I test for radon in Caswell County?: Yes, once. The EPA recommends testing every home regardless of area, and the model's ZIP-level predictions in Caswell County already range from 1.3 to 2.0 pCi/L. A short-term kit costs little and settles the question for your house.
What does EPA Radon Zone 2 mean for Caswell County?: Zone 2 - moderate potential (2-4 pCi/L). The zone map dates from 1993 and classifies whole counties. The newer model's predicted average of 1.8 pCi/L does not line up with Zone 2, which is common - the EPA itself says high-radon homes exist in every zone. Neither replaces a test of your own home.
How much does radon mitigation cost in Caswell County?: A standard active sub-slab depressurization system typically runs $800-$2,500 installed nationally; North Carolina quotes vary with foundation type (slab, crawlspace, basement), home size and local labor. Get two or three bids from certified mitigators listed by your state radon program or the EPA's find-a-professional page.

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