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Radon Levels in Morrill County, Nebraska

EPA puts Morrill County in Zone 2, its middle radon zone, and only 7 radon tests from it are on file with CDC (2023). Homes with elevated levels occur in all three zones, so only a test measures yours.

Data checked By Radon411Methodology

  • Share at 4+ pCi/L

    44.0%

    6.5 pts below NE

    Morrill
    44.0%
    Nebraska
    50.5%

    75 tests, 2014

  • Median result

    3.5pCi/L

    Below action level

    Morrill
    3.5 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2014

  • Tests reported

    75

    51st of 69 by tests

    Morrill
    75
    Douglas
    18,288

    Reported to CDC before any fix, 2014

  • 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

    50 of 69

    Middle half

    Morrill
    44.0%
    Clay
    81.6%

    By share, of 69 with 30+ tests

Read a result for Morrill County

Starts at Morrill County's median, 3.5 pCi/L

3.5pCi/L

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

EPA’s reading of 3.5 pCi/L

Between 2 and 4 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 between 2 and 4 pCi/L. EPA recommends considering a fix when the level is between 2 and 4 pCi/L. Morrill County's median reported result, 2014.

The data

Morrill County, At a glance

Morrill County at a glance

Predicted: EPA radon zone

EPA Zone 2: moderate predicted potential

Morrill 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 59% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Morrill County, 2023

Share of reported tests at or above 4 pCi/L, by year, Morrill County
Share of reported tests at or above 4 pCi/L, by year, Morrill County
YearShare of reported tests at or above 4 pCi/L
201444.0%
201575.0%
201644.4%
201757.1%
201850.0%
201944.4%
202042.9%
202140.0%
20220.0%
202357.1%

2023: 57.1%. Across these years the share ran from 0.0% to 75.0%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

Only 7 tests were reported to CDC for Morrill County over 2023, and tests are often run on homes being sold or already suspected of a problem: so few describe neither the county nor 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

Morrill County, Compared

Morrill County radon figures, compared

Calculated by Radon411

In Morrill County, about 4 in 10 reported tests in 2014 (33 of 75) were at or above EPA's action level. Against the national pool of 34.9%, the gap is 9.1 points higher. Across 85 Nebraska counties pooled together, 50.5% of tests reached that level, so Morrill County runs 6.5 points below its state.

The newest figure, in 2023, counts only 7 tests (57.1% at or above 4 pCi/L), too few to compare, so this reading uses the 75-test figure.

Of 4 neighbours with a figure, 2 reported a larger share at or above 4 pCi/L and 2 a smaller one; the spread is 25.0% (Box Butte County) to 75.0% (Sheridan County). By share, Morrill County is 50th of 69 Nebraska counties with 30 or more tests for the same period.

Year by year, 2014 opened at 44.0% and 2018 closed at 50.0% (up 6.0 points), with 2015 the high at 75.0%. Half the tests came in under 3.5 pCi/L and half over it; the single highest reached 14.1 pCi/L. Below the action level, 15 tests (20.0%) came in under 2 pCi/L, against 23.6% statewide, and 27 tests (36.0%) fell between 2 and 4, against 25.8% statewide.

Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 44.0% share point the same way here. USGS geology rates 59% of the county's land moderate radon potential.

The busiest year on file was 2014, with 75 tests reported; the quietest, 2022, had 3.

Share of reported tests at or above 4 pCi/L by year, Morrill County against Nebraska2014 to 2018, years with 30 or more tests: Morrill County 44.0% to 50.0%, the state's pooled share 44.5% in 2018.
Morrill CountyNebraska, pooled
Share of reported tests at or above 4 pCi/L by year, Morrill County against Nebraska: data table
YearTestsMorrill County, at or above 4 pCi/LNebraska, pooled
20147544.0%50.5%
20156075.0%53.3%
20174257.1%47.7%
20183050.0%44.5%
Morrill County against Nebraska, the United States and nearby counties, 2014
AreaTestsAt or above 4 pCi/LMedianDifference from Morrill County
Morrill County7544.0%3.5 pCi/LThis county
Nebraska, pooled85 counties, pooled56,51750.5%Not pooled+6.5 points
United States, pooled925 counties, pooled517,29334.9%Not pooled−9.1 points
Clay Countyhighest in the state11481.6%8.6 pCi/L+37.6 points
Keith Countylowest in the state339.1%2.6 pCi/L−34.9 points
Sheridan County, NEborders it7275.0%5.0 pCi/L+31.0 points
Scotts Bluff County, NEborders it82253.6%4.1 pCi/L+9.6 points
Cheyenne County, NEborders it41140.9%3.5 pCi/L−3.1 points
Box Butte County, NEborders it10825.0%3.0 pCi/L−19.0 points
Garden County, NEborders it2722.2%2.1 pCi/L−21.8 points
Banner County, NEborders it30.0%3.1 pCi/L−44.0 points
Where Morrill County's reported results fell, 2014, beside Nebraska and the United States
ResultMorrill County testsMorrill County shareNebraska shareU.S. shareAgainst Nebraska
Under 2 pCi/L1520.0%23.6%40.0%−3.6 points
2 to 4 pCi/L2736.0%25.8%25.1%+10.2 points
4 pCi/L and above3344.0%50.5%34.9%−6.5 points
Morrill County ranked among the 69 Nebraska counties with 30 or more tests, by share at or above 4 pCi/L, 2014
CountyRankTestsAt or above 4 pCi/LMedian
Harlan County45 of 694546.7%3.9 pCi/L
Red Willow County46 of 6920746.4%3.7 pCi/L
Antelope County47 of 6911746.2%3.7 pCi/L
Lancaster County48 of 6911,28644.5%3.4 pCi/L
Platte County49 of 6949544.2%3.5 pCi/L
Morrill County50 of 697544.0%3.5 pCi/L
Kimball County51 of 694242.9%3.3 pCi/L
Hall County52 of 6987942.3%3.6 pCi/L
Thayer County53 of 695742.1%3.2 pCi/L
Pierce County54 of 6918041.7%3.2 pCi/L
Cheyenne County55 of 6941140.9%3.5 pCi/L
Morrill County radon tests by year, against Nebraska's pooled share
YearTestsAt or above 4 pCi/LMedianHighestNebraska, pooledChange from the row before
2023757.1%4.7 pCi/L8.7 pCi/L38.2%+57.1 points
202230.0%3.1 pCi/L3.2 pCi/L34.0%−40.0 points
20211540.0%2.4 pCi/L5.1 pCi/L34.9%−2.9 points
20202142.9%3.8 pCi/L9.3 pCi/L42.2%−1.5 points
20192744.4%2.9 pCi/L13.4 pCi/L44.3%−5.6 points
20183050.0%4.5 pCi/L7.8 pCi/L44.5%−7.1 points
20174257.1%4.3 pCi/L9.0 pCi/L47.7%+12.7 points
20162744.4%3.7 pCi/L12.6 pCi/L47.4%−30.6 points
20156075.0%5.8 pCi/L18.1 pCi/L53.3%+31.0 points
20147544.0%3.5 pCi/L14.1 pCi/L50.5%First on file

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

Morrill County, Geology

The ground under Morrill County

Predicted

USGS's geologic map splits Morrill County: 59.3% of its land is moderate radon potential and 40.7% low. The map puts 59.3% of Morrill County in the area it calls Tertiary Rocks and 40.7% in Sand Hills. USGS gives the first a radon index of 11, in the moderate band (9 to 11), and the second 8, in the low band (5 to 8).

USGS's geologic areas under Morrill County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Tertiary RocksTertiary sandstone, siltstone, and volcanic ash.Moderate1159.3%
Sand HillsQuaternary windblown sand.Low840.7%

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

Morrill County beside the ground around it

Across Nebraska 40.9% of the land is rated high; none of Morrill County's is. Of the 6 counties that border it, 1 has more high-potential ground, Sheridan County the most at 0.3%.

Share of land by USGS radon potential: Morrill County, the 6 counties bordering it and Nebraska
AreaEPA zoneLow potentialModerate potentialHigh potential
Morrill CountyZone 240.7%59.3%None
Garden CountyZone 375.0%25.0%None
Scotts Bluff CountyZone 2None100%None
Box Butte CountyZone 226.0%74.0%None
Banner CountyZone 2None100%None
Cheyenne CountyZone 2None100%None
Sheridan CountyZone 268.0%31.7%0.3%
Nebraska93 counties, pooled by land areaVaries28.2%30.9%40.9%

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

What it means

Morrill County, Questions

Questions about radon in Morrill County

Are radon levels high in Morrill County?

In 2023, 57.1% of the radon tests reported to CDC for Morrill County, Nebraska were at or above 4 pCi/L, and the median reported pre-mitigation result was 4.7 pCi/L. Of 69 Nebraska counties with 30 or more tests for the same period, 49 reported a higher share; pooled, the state comes to 50.5%.

Which counties border Morrill County?

Morrill County borders 6 counties: Garden County, Scotts Bluff County, Box Butte County, Banner County, Cheyenne County and Sheridan County.

Products

Morrill County, Products

Testing a home in Morrill County

In Morrill County, 44.0% of 75 tests reported to CDC in 2014 reached 4 pCi/L, against 50.5% pooled across Nebraska. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Morrill County; a long-term test tells the year-round average.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Morrill County homes, compared

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Morrill County, Bordering counties

Counties bordering Morrill County

Calculated by Radon411

Morrill County, Cities and towns

Cities and towns in Morrill County

About 4,404 people live in Morrill County by the Census Bureau's estimate for July 1, 2025, 150 fewer than in 2020 (−3.3%). Spread over its land, that is 3.1 people to the square mile. Its largest town, Bridgeport, has 1,421 residents, 32.3% of the total. Together its 3 incorporated places hold 59.2% of those residents; the other 40.8% live outside any of them. Reported testing is thin here: 75 tests over 2014, or 17.0 for every 1,000 residents (2025 estimate), where Nebraska as a whole comes to 28.0.

From Bridgeport to Broadwater, CDC publishes no figure by town: each reads Morrill County's.

The cities and towns in Morrill County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Bridgeport1,421−2.7%32.3%
Bayard1,087−3.9%24.7%
Broadwater97−3.0%2.2%

3 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).

Morrill County, Homes

Homes in Morrill County

Morrill County is a place of houses on their own lots: 87% of its 2,276 homes are detached single-family houses, against 72% across Nebraska. The homes are older than Nebraska's as a whole: half were built before 1958 (1975 for Nebraska), and 52% date from before 1960. Owners live in 78% of the occupied homes (Nebraska: 67%), so for most households a test and a fix are their own to order.

Homes in Morrill County, Nebraska, 2019 to 2023
HomesMorrill CountyNebraska
Housing units2,276855,631
Detached houses87%72%
In buildings of 5 or more3%17%
Mobile homes7%3%
Built before 196052%32%
Built since 20006%22%
Middle year built19581975
Owner-occupied78%67%

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