Is radon high in Custer County, Nebraska?

Moderate. The model predicts a long-term basement average of 3.1 pCi/L in Custer County (about 1.7× the US average of 1.8 and close to the Nebraska average of 3.6). That is in the 2-4 pCi/L range where the EPA recommends considering mitigation. Ranked 63 of 93 Nebraska counties.

Should I test for radon in Custer County?

Yes, soon. With a predicted average of 3.1 pCi/L, many homes in Custer County will test above the 4 pCi/L action level. Use a short-term kit first; if it reads 2 or higher, confirm with a long-term test or continuous monitor before deciding on mitigation.

What does EPA Radon Zone 2 mean for Custer County?

Zone 2 - moderate potential (2-4 pCi/L). The zone map dates from 1993 and classifies whole counties. The 2001-2021 model agrees with the zone here. Neither replaces a test of your own home.

How much does radon mitigation cost in Custer County?

A standard active sub-slab depressurization system typically runs $800-$2,500 installed nationally; Nebraska 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 Custer County, Nebraska

ModerateEPA Zone 2

Predicted long-term basement average of 3.1 pCi/L (model estimate) across 11 ZIP codes - about 1.7× the US average of 1.8, close to the Nebraska average of 3.6. Ranked #63 of 93 Nebraska counties.

Test Custer County, NE - the EPA says "consider fixing" in this range

The predicted basement average here is 3.1 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.

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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.

3.1 ± 0.06

pCi/L predicted basement mean (model SD)

1.6 ± 0.06

pCi/L predicted upstairs (above-ground) mean

2.4-3.3

range of ZIP-level basement predictions in the county

What this means for Custer

The typical Custer County home is predicted in the 2-4 pCi/L band. The EPA's guidance for this range is to consider fixing, because there is no known safe level and roughly one home in several in a moderate area will test above 4.

The 1993 EPA zone (2) and the 2001-2021 model agree for Custer. County figures weight each ZIP by its 2010 Census population, so they describe where people live rather than empty land.

Comparable Nebraska counties: Cheyenne County (3.1), Valley County (3.1), Douglas County (3.1), Sioux County (3.1). The state's highest is Burt County at 5.7 pCi/L.

ZIP codes in Custer County

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

ZIP	Basement	Upstairs	Grade
68822	3.3 ± 0.06	1.8	Moderate
68825	2.9 ± 0.05	1.5	Moderate
68874	2.9 ± 0.06	1.5	Moderate
69120	3.0 ± 0.05	1.5	Moderate
68814	3.1 ± 0.06	1.7	Moderate
68856	2.7 ± 0.06	1.4	Moderate
68813	2.5 ± 0.06	1.2	Moderate
68855	2.8 ± 0.06	1.6	Moderate
68860	3.1 ± 0.05	1.6	Moderate
68828	2.5 ± 0.06	1.4	Moderate
68881	2.4 ± 0.07	1.3	Moderate

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.

Custer County radon questions

Is radon high in Custer County, Nebraska?: Moderate. The model predicts a long-term basement average of 3.1 pCi/L in Custer County (about 1.7× the US average of 1.8 and close to the Nebraska average of 3.6). That is in the 2-4 pCi/L range where the EPA recommends considering mitigation. Ranked 63 of 93 Nebraska counties.
Should I test for radon in Custer County?: Yes, soon. With a predicted average of 3.1 pCi/L, many homes in Custer County will test above the 4 pCi/L action level. Use a short-term kit first; if it reads 2 or higher, confirm with a long-term test or continuous monitor before deciding on mitigation.
What does EPA Radon Zone 2 mean for Custer County?: Zone 2 - moderate potential (2-4 pCi/L). The zone map dates from 1993 and classifies whole counties. The 2001-2021 model agrees with the zone here. Neither replaces a test of your own home.
How much does radon mitigation cost in Custer County?: A standard active sub-slab depressurization system typically runs $800-$2,500 installed nationally; Nebraska 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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