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Radon Levels in York County, Nebraska

EPA puts York County in Zone 1, its highest radon zone, and high results are common there: 64.5% of the 62 radon tests reported to CDC (2023) came back 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

    64.5%

    26.3 pts above NE

    York
    64.5%
    Nebraska
    38.2%

    62 tests, 2023

  • Median result

    5.7pCi/L

    Action level reached

    York
    5.7 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2023

  • Tests reported

    62

    19th of 33 by tests

    York
    62
    Lancaster
    4,058

    Reported to CDC before any fix, 2023

  • EPA radon zone

    Zone 1

    Highest potential

    1. Zone 1
    2. 2
    3. 3

    1 highest, 3 lowest

    EPA predicts over 4 pCi/L indoors

  • Rank in Nebraska

    14 of 33

    Middle half

    York
    64.5%
    Gage
    79.8%

    By share, of 33 with 30+ tests

Read a result for York County

Starts at York County's median, 5.7 pCi/L

5.7pCi/L

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

EPA’s reading of 5.7 pCi/L

At or above 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 at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher. York County's median reported result, 2023.

Interpret this readingWhat a fix costs

The data

York County, At a glance

York County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of York County in and predicts an average indoor of greater than 4 pCi/L (greater than 150 Bq/m³) across the county. That is one forecast for the whole county, not a reading of any address in it; homes above EPA's turn up in all three zones.

USGS geologic potential: High across 100% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for York County, 2023

Share of reported tests at or above 4 pCi/L, by year, York County
Share of reported tests at or above 4 pCi/L, by year, York County
YearShare of reported tests at or above 4 pCi/L
201468.8%
201562.9%
201668.7%
201766.3%
201871.5%
201974.4%
202069.0%
202167.5%
202280.6%
202364.5%

2023: 64.5%. Across these years the share ran from 62.9% to 80.6%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

These are the 62 tests reported to CDC for York 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

York County, Compared

York County radon figures, compared

Calculated by Radon411

More than half: 64.5% of the 62 radon tests reported to CDC for York County in 2023 read at least 4 pCi/L. That places it 14th of 33 Nebraska counties with 30 or more tests for the same period. That is 26.3 points above the 38.2% pooled from 86 Nebraska counties.

The median result, 5.7 pCi/L, sits above EPA's 4 pCi/L action level, and the top reported result was 52.6 pCi/L. The rest split 17.7% under 2 pCi/L and 17.7% from 2 to 4 (Nebraska: 39.2% and 22.6%). Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 64.5% share point the same way here.

All 2 of its bordering counties with figures ran higher, led by Seward County at 77.3%; the lowest of them, Hamilton County, reported 64.6%. Statewide for the same period, Gage County reported the highest share (79.8%) and Dakota County the lowest (3.1%).

The busiest year on file was 2016, with 948 tests reported; the quietest, 2023, had 62.

Over 10 years of annual figures the share fell 4.3 points, from 68.8% in 2014 to 64.5% in 2023; its peak was 80.6% in 2022. Nationally, every county with a figure for the same period pools to 33.4%; York County sits 31.1 points above it. CDC also counts 13 tests taken after mitigation in York 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, York County against Nebraska2014 to 2023, years with 30 or more tests: York County 68.8% to 64.5%, the state's pooled share 38.2% in 2023.
York CountyNebraska, pooled
Share of reported tests at or above 4 pCi/L by year, York County against Nebraska: data table
YearTestsYork County, at or above 4 pCi/LNebraska, pooled
201442368.8%50.5%
201545362.9%53.3%
201694868.7%47.4%
201757966.3%47.7%
201851671.5%44.5%
201924674.4%44.3%
202038769.0%42.2%
202124967.5%34.9%
20226780.6%34.0%
20236264.5%38.2%
York County against Nebraska, the United States and nearby counties, 2023
AreaTestsAt or above 4 pCi/LMedianDifference from York County
York County6264.5%5.7 pCi/LThis county
Nebraska, pooled86 counties, pooled11,16338.2%Not pooled−26.3 points
United States, pooled642 counties, pooled128,74033.4%Not pooled−31.1 points
Gage Countyhighest in the state8479.8%9.4 pCi/L+15.3 points
Dakota Countylowest in the state1303.1%0.4 pCi/L−61.4 points
Fillmore County, NEborders it9100.0%13.5 pCi/L+35.5 points
Polk County, NEborders it1894.4%7.0 pCi/L+29.9 points
Seward County, NEborders it8877.3%7.8 pCi/L+12.8 points
Clay County, NEborders it2766.7%5.7 pCi/L+2.2 points
Hamilton County, NEborders it4864.6%5.0 pCi/L+0.1 points
Butler County, NEborders it2356.5%7.0 pCi/L−8.0 points
Saline County, NEborders it2951.7%4.2 pCi/L−12.8 points
Where York County's reported results fell, 2023, beside Nebraska and the United States
ResultYork County testsYork County shareNebraska shareU.S. shareAgainst Nebraska
Under 2 pCi/L1117.7%39.2%41.4%−21.5 points
2 to 4 pCi/L1117.7%22.6%25.2%−4.9 points
4 pCi/L and above4064.5%38.2%33.4%+26.3 points
York 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
Cass County9 of 3311168.5%5.5 pCi/L
Madison County10 of 3321366.7%5.8 pCi/L
Adams County11 of 3315566.5%4.8 pCi/L
Phelps County12 of 334365.1%4.9 pCi/L
Hamilton County13 of 334864.6%5.0 pCi/L
York County14 of 336264.5%5.7 pCi/L
Otoe County15 of 335964.4%5.7 pCi/L
Red Willow County16 of 335362.3%4.6 pCi/L
Dodge County17 of 3311662.1%5.0 pCi/L
Richardson County18 of 333461.8%5.1 pCi/L
Knox County19 of 334660.9%4.7 pCi/L
York County radon tests by year, against Nebraska's pooled share
YearTestsAt or above 4 pCi/LMedianHighestNebraska, pooledChange from the row before
20236264.5%5.7 pCi/L52.6 pCi/L38.2%−16.1 points
20226780.6%6.1 pCi/L20.9 pCi/L34.0%+13.1 points
202124967.5%5.7 pCi/L25.9 pCi/L34.9%−1.5 points
202038769.0%5.8 pCi/L72.0 pCi/L42.2%−5.4 points
201924674.4%7.0 pCi/L35.4 pCi/L44.3%+2.9 points
201851671.5%7.3 pCi/L32.2 pCi/L44.5%+5.2 points
201757966.3%5.7 pCi/L32.1 pCi/L47.7%−2.4 points
201694868.7%6.8 pCi/L33.7 pCi/L47.4%+5.8 points
201545362.9%5.6 pCi/L28.0 pCi/L53.3%−5.9 points
201442368.8%6.6 pCi/L30.0 pCi/L50.5%First on file

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

York County, Geology

The ground under York County

Predicted

USGS's geologic map puts all of York County's mapped land in one class: high radon potential. All of it lies in the area the map calls Pre-Wisconsin glacial deposits, to which USGS gives a radon index of 13, in the high band (12 to 17).

USGS's geologic areas under York County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Pre-Wisconsin glacial depositsLoess-mantled glacial drift.High13100%

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

York County beside the ground around it

York County has more high-potential ground than Nebraska as a whole: 100% of its land against 40.9%. Of the 7 counties that border it, none has as large a share of high-potential ground; Clay County comes nearest at 100%.

Share of land by USGS radon potential: York County, the 7 counties bordering it and Nebraska
AreaEPA zoneLow potentialModerate potentialHigh potential
York CountyZone 1NoneNone100%
Hamilton CountyZone 1None12.6%87.4%
Polk CountyZone 1None26.1%73.9%
Seward CountyZone 1NoneNone100%
Fillmore CountyZone 1NoneNone100%
Saline CountyZone 1NoneNone100%
Butler CountyZone 1None0.1%99.9%
Clay CountyZone 1NoneNone100%
Nebraska93 counties, pooled by land areaVaries28.2%30.9%40.9%

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

Local help

York County, Local resources

Radon testing and mitigation in York County

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

York County, Questions

Questions about radon in York County

Are radon levels high in York County?

In 2023, 64.5% of the radon tests reported to CDC for York County, Nebraska were at or above 4 pCi/L, and the median reported pre-mitigation result was 5.7 pCi/L. Of 33 Nebraska counties with 30 or more tests for the same period, 13 reported a higher share; pooled, the state comes to 38.2%.

Which counties border York County?

York County borders 7 counties: Hamilton County, Polk County, Seward County, Fillmore County, Saline County, Butler County and Clay County.

Products

York County, Products

Testing a home in York County

In York County, 64.5% of 62 tests reported to CDC in 2023 reached 4 pCi/L, against 38.2% pooled across Nebraska. In Zone 1 the year-round level in York County is the one to know: a long-term test (more than 90 days) or a monitor, with a short-term kit for a first answer.

Test kits and monitors3

See every kit and monitor

York County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like York County

Explore

York County, Bordering counties

Counties bordering York County

Calculated by Radon411

York County, Cities and towns

Cities and towns in York County

The Census Bureau estimates 14,564 residents in York County for July 1, 2025, 469 more than in 2020 (+3.3%). That works out to 25 people per square mile of land. York alone is home to 8,284 of them, 56.9% of the total. Together its 9 incorporated places hold 75.3% of those residents; the other 24.7% live outside any of them. CDC's 62 reported tests for 2023 work out to 4.3 per 1,000 residents (2025 estimate), close to Nebraska's 5.5.

From York to Lushton, CDC publishes no figure by town: each reads York County's.

The cities and towns in York County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
York8,284+2.9%56.9%
Henderson1,097+1.5%7.5%
McCool Junction486+7.0%3.3%
Waco312+6.1%2.1%
Bradshaw282+3.7%1.9%
Gresham225+2.3%1.5%
Benedict205+2.5%1.4%
Thayer52+6.1%0.4%
Lushton27+8.0%0.2%

9 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).

York County, Homes

Homes in York County

York County is a place of houses on their own lots: 78% of its 6,346 homes are detached single-family houses, against 72% across Nebraska. The homes are older than Nebraska's as a whole: half were built before 1964 (1975 for Nebraska), and 46% date from before 1960. 75% 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 York County, Nebraska, 2019 to 2023
HomesYork CountyNebraska
Housing units6,346855,631
Detached houses78%72%
In buildings of 5 or more10%17%
Mobile homes3%3%
Built before 196046%32%
Built since 200011%22%
Middle year built19641975
Owner-occupied75%67%

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