Is radon high in Union County, New Jersey?

Low. The model predicts a long-term basement average of 1.3 pCi/L in Union County (about 31% below the US average of 1.8 and close to the New Jersey average of 1.3). That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Ranked 14 of 21 New Jersey counties.

Should I test for radon in Union County?

Yes, once. The EPA recommends testing every home regardless of area, and the model's ZIP-level predictions in Union County already range from 0.8 to 1.6 pCi/L. A short-term kit costs little and settles the question for your house.

What does EPA Radon Zone 2 mean for Union 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 1.3 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 Union County?

A standard active sub-slab depressurization system typically runs $800-$2,500 installed nationally; New Jersey 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 Union County, New Jersey

LowEPA Zone 2

Predicted long-term basement average of 1.3 pCi/L (model estimate) across 26 ZIP codes - about 31% below the US average of 1.8, close to the New Jersey average of 1.3. Ranked #14 of 21 New Jersey counties.

Test Union County, NJ once anyway - radon varies house to house

The predicted basement average here is 1.3 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.

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

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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.

1.3 ± 0.05

pCi/L predicted basement mean (model SD)

0.7 ± 0.07

pCi/L predicted upstairs (above-ground) mean

0.8-1.6

range of ZIP-level basement predictions in the county

What this means for Union

The typical Union 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 0.8 to 1.6 pCi/L.

Note that the EPA classifies Union County as Zone 2 while the newer model predicts 1.3 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 New Jersey counties: Cumberland County (1.3), Atlantic County (1.2), Ocean County (1.2), Burlington County (1.3). The state's highest is Warren County at 2.3 pCi/L.

ZIP codes in Union County

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

ZIP	Basement	Upstairs	Grade
07083	1.3 ± 0.05	0.6	Low
07060	1.5 ± 0.06	1.0	Low
07036	1.1 ± 0.05	0.6	Low
07202	1.0 ± 0.06	0.5	Low
07208	1.2 ± 0.06	0.6	Low
07090	1.3 ± 0.05	0.7	Low
07065	1.2 ± 0.05	0.6	Low
07206	0.8 ± 0.07	0.5	Low
07201	1.0 ± 0.07	0.5	Low
07076	1.6 ± 0.05	1.2	Low
07901	1.2 ± 0.05	0.6	Low
07016	1.3 ± 0.05	0.7	Low
07205	1.2 ± 0.04	0.6	Low
07203	1.2 ± 0.05	0.6	Low
07081	1.3 ± 0.06	0.7	Low
07066	1.3 ± 0.06	0.7	Low
07063	1.6 ± 0.05	1.0	Low
07204	1.2 ± 0.05	0.6	Low
07062	1.5 ± 0.05	1.0	Low
07922	1.5 ± 0.05	1.1	Low
07974	1.3 ± 0.05	0.7	Low
07033	1.3 ± 0.05	0.7	Low
07023	1.5 ± 0.05	1.1	Low
07092	1.3 ± 0.06	0.7	Low
07027	1.2 ± 0.06	0.6	Low
07088	1.2 ± 0.05	0.7	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.

Union County radon questions

Is radon high in Union County, New Jersey?: Low. The model predicts a long-term basement average of 1.3 pCi/L in Union County (about 31% below the US average of 1.8 and close to the New Jersey average of 1.3). That is below the EPA's 2 pCi/L "consider fixing" threshold, though individual homes still vary. Ranked 14 of 21 New Jersey counties.
Should I test for radon in Union County?: Yes, once. The EPA recommends testing every home regardless of area, and the model's ZIP-level predictions in Union County already range from 0.8 to 1.6 pCi/L. A short-term kit costs little and settles the question for your house.
What does EPA Radon Zone 2 mean for Union 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 1.3 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 Union County?: A standard active sub-slab depressurization system typically runs $800-$2,500 installed nationally; New Jersey 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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