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Radon Levels in Hall County, Nebraska

EPA puts Hall County in Zone 2, its middle radon zone, and 17.8% of its 253 reported radon tests (2023) were at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

How to test this homeFind a certified tester

  • Share at 4+ pCi/L

    17.8%

    20.4 pts below NE

    Hall
    17.8%
    Nebraska
    38.2%

    253 tests, 2023

  • Median result

    1.7pCi/L

    Below action level

    Hall
    1.7 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2023

  • Tests reported

    253

    6th of 33 by tests

    Hall
    253
    Lancaster
    4,058

    Reported to CDC before any fix, 2023

  • EPA radon zone

    Zone 2

    Moderate potential

    1. 1
    2. Zone 2
    3. 3

    1 highest, 3 lowest

    EPA predicts 2 to 4 pCi/L indoors

  • Rank in Nebraska

    31 of 33

    Lowest quarter

    Hall
    17.8%
    Gage
    79.8%

    By share, of 33 with 30+ tests

Read a result for Hall County

Starts at Hall County's median, 1.7 pCi/L

1.7pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 1.7 pCi/L

Below 2 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 below 2 pCi/L, the level at which EPA says a fix should be considered. Hall County's median reported result, 2023.

Interpret this reading

The data

Hall County, At a glance

Hall County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Hall County is a county: EPA's forecast for it as a whole is an average indoor of 2 to 4 pCi/L (75 to 150 Bq/m³). It describes no single address, and homes above EPA's are found in every zone, this one included.

USGS geologic potential: Moderate across 80% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Hall County, 2023

Share of reported tests at or above 4 pCi/L, by year, Hall County
Share of reported tests at or above 4 pCi/L, by year, Hall County
YearShare of reported tests at or above 4 pCi/L
201442.3%
201530.1%
201625.7%
201732.3%
201828.5%
201929.4%
202014.7%
202121.9%
202216.0%
202317.8%

2023: 17.8%. Across these years the share ran from 14.7% to 42.3%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

These are the 253 tests reported to CDC for Hall County over 2023, many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.

Measured: CDC tracking data. Figure above: 2023. Measured data period: 2005 to 2023 (every CDC figure on file).

How to read these figures

Hall County, Compared

Hall County radon figures, compared

Calculated by Radon411

Hall County's 253 reported tests in 2023 had a middle value of 1.7 pCi/L and a maximum of 21.7 pCi/L, and 17.8% reached 4 pCi/L. Nebraska as a whole (86 Nebraska counties, pooled) comes to 38.2%: 20.4 points higher than here.

Among its state's counties it ranks 31st of 33 Nebraska counties with 30 or more tests for the same period. Statewide for the same period, Gage County reported the highest share (79.8%) and Dakota County the lowest (3.1%).

Below the action level, 139 tests (54.9%) came in under 2 pCi/L, against 39.2% statewide, and 69 tests (27.3%) fell between 2 and 4, against 22.6% statewide. The busiest year on file was 2020, with 1,290 tests reported; the quietest, 2022, had 175.

EPA's 1993 zone map puts Hall County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 80% of the county's land moderate radon potential.

Next door, the shares run from 55.5% in Buffalo County to 66.5% in Adams County. Over 10 years of annual figures the share fell 24.5 points, from 42.3% in 2014 to 17.8% in 2023; its peak was 42.3% in 2014.

CDC also counts 18 tests taken after mitigation in Hall County for the same period: tests in homes where a fix was already in.

Share of reported tests at or above 4 pCi/L by year, Hall County against Nebraska2014 to 2023, years with 30 or more tests: Hall County 42.3% to 17.8%, the state's pooled share 38.2% in 2023.
Hall CountyNebraska, pooled
Share of reported tests at or above 4 pCi/L by year, Hall County against Nebraska: data table
YearTestsHall County, at or above 4 pCi/LNebraska, pooled
201487942.3%50.5%
201595730.1%53.3%
20161,15525.7%47.4%
20171,08632.3%47.7%
20181,08628.5%44.5%
20191,06229.4%44.3%
20201,29014.7%42.2%
202172621.9%34.9%
202217516.0%34.0%
202325317.8%38.2%
Hall County against Nebraska, the United States and nearby counties, 2023
AreaTestsAt or above 4 pCi/LMedianDifference from Hall County
Hall County25317.8%1.7 pCi/LThis county
Nebraska, pooled86 counties, pooled11,16338.2%Not pooled+20.4 points
United States, pooled642 counties, pooled128,74033.4%Not pooled+15.6 points
Gage Countyhighest in the state8479.8%9.4 pCi/L+62.0 points
Dakota Countylowest in the state1303.1%0.4 pCi/L−14.7 points
Adams County, NEborders it15566.5%4.8 pCi/L+48.7 points
Hamilton County, NEborders it4864.6%5.0 pCi/L+46.8 points
Buffalo County, NEborders it17355.5%4.2 pCi/L+37.7 points
Howard County, NEborders it944.4%3.3 pCi/L+26.6 points
Merrick County, NEborders it1216.7%1.9 pCi/L−1.1 points
Where Hall County's reported results fell, 2023, beside Nebraska and the United States
ResultHall County testsHall County shareNebraska shareU.S. shareAgainst Nebraska
Under 2 pCi/L13954.9%39.2%41.4%+15.7 points
2 to 4 pCi/L6927.3%22.6%25.2%+4.7 points
4 pCi/L and above4517.8%38.2%33.4%−20.4 points
Hall County ranked among the 33 Nebraska counties with 30 or more tests, by share at or above 4 pCi/L, 2023
CountyRankTestsAt or above 4 pCi/LMedian
Sarpy County23 of 3375551.9%4.1 pCi/L
Douglas County24 of 332,75438.7%2.9 pCi/L
Cheyenne County25 of 335536.4%3.6 pCi/L
Box Butte County26 of 335435.2%3.3 pCi/L
Scotts Bluff County27 of 3327327.5%1.8 pCi/L
Lancaster County28 of 334,05826.7%1.6 pCi/L
Platte County29 of 3321226.4%1.6 pCi/L
Dawson County30 of 339718.6%2.0 pCi/L
Hall County31 of 3325317.8%1.7 pCi/L
Lincoln County32 of 3327112.2%2.1 pCi/L
Dakota County33 of 331303.1%0.4 pCi/L
Hall County radon tests by year, against Nebraska's pooled share
YearTestsAt or above 4 pCi/LMedianHighestNebraska, pooledChange from the row before
202325317.8%1.7 pCi/L21.7 pCi/L38.2%+1.8 points
202217516.0%2.1 pCi/L13.7 pCi/L34.0%−5.9 points
202172621.9%2.5 pCi/L23.3 pCi/L34.9%+7.2 points
20201,29014.7%1.8 pCi/L8.8 pCi/L42.2%−14.7 points
20191,06229.4%3.0 pCi/L26.1 pCi/L44.3%+0.9 points
20181,08628.5%2.6 pCi/L16.9 pCi/L44.5%−3.8 points
20171,08632.3%2.9 pCi/L20.7 pCi/L47.7%+6.6 points
20161,15525.7%2.6 pCi/L12.3 pCi/L47.4%−4.4 points
201595730.1%2.9 pCi/L15.1 pCi/L53.3%−12.2 points
201487942.3%3.6 pCi/L35.6 pCi/L50.5%First on file

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

Hall County, Geology

The ground under Hall County

Predicted

Most of the ground under Hall County is one class on USGS's geologic map: 79.7% of its land is moderate radon potential, with 20.3% high. The map puts 79.7% of Hall County in the area it calls Loess over Tertiary sediments and 14.0% in Loess over K-T, with one smaller area beside them. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 13, in the high band (12 to 17).

USGS's geologic areas under Hall County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Loess over Tertiary sedimentsTertiary bedrock covered by varying thicknesses of loess.Moderate1179.7%
Loess over K-TLoess-mantled Tertiary and Cretaceous bedrock.High1314.0%
Pre-Wisconsin glacial depositsLoess-mantled glacial drift.High136.3%

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

Hall County beside the ground around it

Nebraska as a whole has more high-potential ground than Hall County: 40.9% of its land, against 20.3% here. Of the 5 counties that border it, 2 have more high-potential ground, Adams County the most at 99.9%.

Share of land by USGS radon potential: Hall County, the 5 counties bordering it and Nebraska
AreaEPA zoneLow potentialModerate potentialHigh potential
Hall CountyZone 2None79.7%20.3%
Howard CountyZone 2None83.4%16.6%
Hamilton CountyZone 1None12.6%87.4%
Merrick CountyZone 2None99.2%0.8%
Adams CountyZone 1None0.1%99.9%
Buffalo CountyZone 2None100%None
Nebraska93 counties, pooled by land areaVaries28.2%30.9%40.9%

The map rates the ground, not the air in any home.

Local help

Hall County, Local resources

Radon testing and mitigation in Hall County

Listed radon businesses with an address in Hall County:

Listed radon professionals by town: Grand Island, Doniphan

What Nebraska's program says
Phone
(402) 471-1005
Licensing of radon professionals
If radon testing is done in schools, offices, or other places of work, it must be done by a licensed radon measurement business.

What it means

Hall County, Questions

Questions about radon in Hall County

Are radon levels high in Hall County?

In 2023, 17.8% of the radon tests reported to CDC for Hall County, Nebraska were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.7 pCi/L. Of 33 Nebraska counties with 30 or more tests for the same period, 30 reported a higher share; pooled, the state comes to 38.2%.

Which counties border Hall County?

Hall County borders 5 counties: Howard County, Hamilton County, Merrick County, Adams County and Buffalo County.

Products

Hall County, Products

Testing a home in Hall County

In Hall County, 17.8% of 253 tests reported to CDC in 2023 reached 4 pCi/L, against 38.2% pooled across Nebraska. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Hall County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Hall County homes, compared

Explore

Hall County, Bordering counties

Counties bordering Hall County

Calculated by Radon411

Hall County, Cities and towns

Cities and towns in Hall County

The Census Bureau estimates 63,633 residents in Hall County for July 1, 2025, 866 more than in 2020 (+1.4%). That works out to 116 people per square mile of land. Grand Island alone is home to 53,943 of them, 84.8% of the total. CDC's 253 reported tests for 2023 work out to 4.0 per 1,000 residents (2025 estimate), close to Nebraska's 5.5.

From Grand Island to Alda, CDC publishes no figure by town: each reads Hall County's.

The cities and towns in Hall County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Grand Island53,943+1.7%84.8%
Wood River1,169−0.8%1.8%
Sheltonextends beyond Hall County1,042LevelCounted whole
Cairo824−0.6%1.3%
Doniphan819−0.5%1.3%
Alda654+0.9%1.0%

6 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). A place that extends beyond Hall County is counted whole, so it has no share.

Hall County, Homes

Homes in Hall County

Of Hall County's 25,377 homes, 67% are detached houses, against 72% across Nebraska; 15% are in buildings of five or more homes. Half of its homes were built before 1975, close to Nebraska's 1975: 30% date from before 1960 and 18% from 2000 or later. 63% of occupied homes are lived in by their owner (Nebraska: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Hall County, Nebraska, 2019 to 2023
HomesHall CountyNebraska
Housing units25,377855,631
Detached houses67%72%
In buildings of 5 or more15%17%
Mobile homes5%3%
Built before 196030%32%
Built since 200018%22%
Middle year built19751975
Owner-occupied63%67%

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