Is radon high in ZIP 27357?

Moderate. The model's predicted long-term basement average for ZIP 27357 is 2.6 pCi/L (SD 0.08), with above-ground floors at 1.4 pCi/L. That is about 1.2× the average US ZIP code (2.2) and about 1.2× the Rockingham County average of 2.1. It ranks 1 of 7 ZIPs in the county.

Do I need to test my home in 27357?

Yes. 27357's predicted average falls in the EPA's 2-4 pCi/L "consider fixing" band, and a meaningful share of individual homes in such areas test above 4. Test with a short-term kit and confirm anything at 2 or higher with a long-term test.

What EPA radon zone is ZIP 27357 in?

ZIP 27357 lies mostly in Rockingham County, which the EPA classifies as Radon Zone 1 (highest potential (predicted average > 4 pCi/L)). Zones are county-wide and date from 1993; the ZIP-level prediction above is from a 2001-2021 model built on millions of tests.

Radon levels in ZIP 27357

ModerateEPA Zone 1

ZIP 27357 (Rockingham County, North Carolina): predicted long-term basement average of 2.6 pCi/L (model estimate), about 1.2× the average US ZIP (2.2) and about 1.6× the North Carolina average (1.7).

Test ZIP 27357 - the EPA says "consider fixing" in this range

The predicted basement average here is 2.6 pCi/L, in the 2-4 pCi/L band where the EPA recommends considering mitigation. Plenty of individual homes in a moderate area test above 4. Start with a short-term test; if it comes back at 2 or higher, follow up with a long-term test or a continuous monitor.

Get a short-term test kit →Or track it with a continuous monitor

Already tested at 4 pCi/L or higher? Find a certified mitigation professional (EPA). A mitigation system typically runs $800-$2,500 installed.

We may earn a commission from Amazon at no extra cost to you.

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.

2.6 ± 0.08

pCi/L predicted basement mean (model SD)

1.4 ± 0.07

pCi/L predicted upstairs mean

1.9 ± 0.08

pCi/L predicted typical screening test

How 27357 compares

Within Rockingham County, ZIP 27357 ranks #1 of 7 ZIPs by predicted basement level; the county average is 2.1 pCi/L and its ZIPs run from 1.7 to 2.6. The county is EPA Radon Zone 1. About 7,894 people lived in this ZIP at the 2010 Census.

Above-ground floors are predicted at 1.4 pCi/L, below the action level, while basements sit in the 2-4 band. If you spend time in a finished basement, test there first.

Other ZIP codes in Rockingham County

273202.2
272881.7
270252.1
270482.1
270272.0
273262.1

ZIP 27357 radon questions

Is radon high in ZIP 27357?: Moderate. The model's predicted long-term basement average for ZIP 27357 is 2.6 pCi/L (SD 0.08), with above-ground floors at 1.4 pCi/L. That is about 1.2× the average US ZIP code (2.2) and about 1.2× the Rockingham County average of 2.1. It ranks 1 of 7 ZIPs in the county.
Do I need to test my home in 27357?: Yes. 27357's predicted average falls in the EPA's 2-4 pCi/L "consider fixing" band, and a meaningful share of individual homes in such areas test above 4. Test with a short-term kit and confirm anything at 2 or higher with a long-term test.
What EPA radon zone is ZIP 27357 in?: ZIP 27357 lies mostly in Rockingham County, which the EPA classifies as Radon Zone 1 (highest potential (predicted average > 4 pCi/L)). Zones are county-wide and date from 1993; the ZIP-level prediction above is from a 2001-2021 model built on millions of tests.

ZIP pages are generated for ZIPs predicted at or above 2.5 pCi/L and for the most populous ZIP in each county; all other ZIPs appear in their county table. Methodology.