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Radon Levels in Wyoming County, New York

EPA puts Wyoming County in Zone 1, its highest radon zone, and only 5 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

    39.3%

    14.8 pts above NY

    Wyoming
    39.3%
    New York
    24.5%

    338 tests, 2008 to 2017

  • Median result

    3.0pCi/L

    Below action level

    Wyoming
    3.0 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    338

    45th of 61 by tests

    Wyoming
    338
    Erie
    13,822

    Reported to CDC before any fix, 2008 to 2017

  • 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 New York

    10 of 61

    Top quarter

    Wyoming
    39.3%
    Chemung
    52.3%

    By share, of 61 with 30+ tests

Read a result for Wyoming County

Starts at Wyoming County's median, 3.0 pCi/L

3.0pCi/L

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

EPA’s reading of 3.0 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. Wyoming County's median reported result, 2008 to 2017.

The data

Wyoming County, At a glance

Wyoming County at a glance

Predicted: EPA radon zone

EPA Zone 1: highest predicted potential

EPA puts all of Wyoming 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 Wyoming County, 2023

Share of reported tests at or above 4 pCi/L, by year, Wyoming County
Share of reported tests at or above 4 pCi/L, by year, Wyoming County
YearShare of reported tests at or above 4 pCi/L
201420.0%
201533.3%
201680.0%
201760.0%
201828.6%
201940.0%
202066.7%
202140.0%
202320.0%

2023: 20.0%. Across these years the share ran from 20.0% to 80.0%. Each column counts radon tests reported to CDC that year, not homes.

What these figures count

Only 5 tests were reported to CDC for Wyoming 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

Wyoming County, Compared

Wyoming County radon figures, compared

Calculated by Radon411

In Wyoming County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (133 of 338) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 3.6 points higher. Across 62 New York counties pooled together, 24.5% of tests reached that level, so Wyoming County runs 14.8 points above its state.

The newest figure, in 2023, counts only 5 tests (20.0% at or above 4 pCi/L), too few to compare, so this reading uses the 338-test figure.

Of 5 neighbours with a figure, 2 reported a larger share at or above 4 pCi/L and 3 a smaller one; the spread is 18.2% (Erie County) to 42.6% (Allegany County). By share, Wyoming County is 10th of 61 New York counties with 30 or more tests for the same period.

Half the tests came in under 3.0 pCi/L and half over it; the single highest reached 123.6 pCi/L. Below the action level, 110 tests (32.5%) came in under 2 pCi/L, against 51.7% statewide, and 95 tests (28.1%) fell between 2 and 4, against 23.7% statewide.

Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 39.3% share point the same way here. USGS geology rates 100% of the county's land high radon potential. CDC also counts 7 tests taken after mitigation in Wyoming County for the same period: tests in homes where a fix was already in.

The busiest year on file was 2015, with 12 tests reported; the quietest, 2020, had 3.

Wyoming County against New York, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Wyoming County
Wyoming County33839.3%3.0 pCi/LThis county
New York, pooled62 counties, pooled97,14524.5%Not pooled−14.8 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled−3.6 points
Chemung Countyhighest in the state1,53752.3%4.3 pCi/L+13.0 points
Bronx Countylowest in the state1853.2%0.5 pCi/L−36.1 points
Allegany County, NYborders it38342.6%2.9 pCi/L+3.3 points
Cattaraugus County, NYborders it59940.6%3.0 pCi/L+1.3 points
Livingston County, NYborders it51938.3%3.1 pCi/L−1.0 points
Genesee County, NYborders it31734.7%2.6 pCi/L−4.6 points
Erie County, NYborders it13,82218.2%1.5 pCi/L−21.1 points
Where Wyoming County's reported results fell, 2008 to 2017, laboratory, beside New York and the United States
ResultWyoming County testsWyoming County shareNew York shareU.S. shareAgainst New York
Under 2 pCi/L11032.5%51.7%39.6%−19.2 points
2 to 4 pCi/L9528.1%23.7%24.7%+4.4 points
4 pCi/L and above13339.3%24.5%35.7%+14.8 points
Wyoming County ranked among the 61 New York counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Allegany County5 of 6138342.6%2.9 pCi/L
Herkimer County6 of 6133741.5%3.1 pCi/L
Dutchess County7 of 612,13340.8%3.0 pCi/L
Cattaraugus County8 of 6159940.6%3.0 pCi/L
Columbia County9 of 6157339.8%2.7 pCi/L
Wyoming County10 of 6133839.3%3.0 pCi/L
Tioga County11 of 611,41938.9%2.7 pCi/L
Schuyler County12 of 6123638.6%2.5 pCi/L
Livingston County13 of 6151938.3%3.1 pCi/L
Chautauqua County14 of 6199438.0%2.5 pCi/L
Otsego County15 of 611,45237.6%2.8 pCi/L
Wyoming County radon tests by year, against New York's pooled share
YearTestsAt or above 4 pCi/LMedianHighestNew York, pooledChange from the row before
2023520.0%1.9 pCi/L4.4 pCi/L32.0%−20.0 points
2021540.0%2.3 pCi/L19.3 pCi/L18.9%−26.7 points
2020366.7%5.3 pCi/L9.9 pCi/L22.7%+26.7 points
20191040.0%3.4 pCi/L21.7 pCi/L28.0%+11.4 points
2018728.6%3.2 pCi/L9.0 pCi/L26.9%−31.4 points
2017560.0%4.6 pCi/L6.4 pCi/L31.6%−20.0 points
2016580.0%4.7 pCi/L8.7 pCi/L20.4%+46.7 points
20151233.3%1.9 pCi/L18.0 pCi/L21.4%+13.3 points
2014520.0%1.5 pCi/L4.4 pCi/L16.6%First on file

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

Wyoming County, State data

New York's own radon test data

Measured

What New York's own agencies publish about radon tests in Wyoming County, with their period. These are not CDC's figures and are never added to them.

MeasuredState figures, not CDC's

What the New York State Department of Health reports for Wyoming County

Indoor air radon testing data (Environmental Public Health Tracker): short-term charcoal canister tests requested through the NYSDOH Radon Program, presented as five-year rolling averages. Period: 2015-2019. The publisher also lists 15 earlier periods.

Share at or above 4 pCi/L

44.7%

Average result

4.5 pCi/L

Tests behind these figures

7.6 tests a year on average

  • Every figure is a five-year rolling average: the average result is the rolling average of each year's mean, and the test count is an average per year.
  • The data only include tests requested through the NYSDOH Radon Program, and therefore may not capture all radon tests performed in a county.
  • The data include both screening tests and post-mitigation tests, as it is not always possible to tell them apart.
  • Radon testing by homeowners is optional in New York, so the values may not be representative of every home in the county.
  • These figures describe tests reported to the New York State Department of Health in this area. They count a different set of tests than CDC's figures and are not a reading of any one home.

Measured: New York State Department of Health data, 2015-2019.

Wyoming County, Geology

The ground under Wyoming County

Predicted

USGS's geologic map puts all of Wyoming County's mapped land in one class: high radon potential. All of it lies in the area the map calls Allegheny Plateau, to which USGS gives a radon index of 12, in the high band (12 to 17).

USGS's geologic areas under Wyoming County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Allegheny PlateauShale, limestone, and sandstone.High12100%

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

Wyoming County beside the ground around it

Wyoming County has more high-potential ground than New York as a whole: 100% of its land against 48.9%. Of the 5 counties that border it, none has as large a share of high-potential ground; Allegany County comes nearest at 99.5%.

Share of land by USGS radon potential: Wyoming County, the 5 counties bordering it and New York
AreaEPA zoneLow potentialModerate potentialHigh potential
Wyoming CountyZone 1NoneNone100%
Genesee CountyZone 1None39.7%60.3%
Livingston CountyZone 1None2.5%97.5%
Erie CountyZone 1None15.2%81.2%
Allegany CountyZone 1None0.5%99.5%
Cattaraugus CountyZone 1None25.3%74.7%
New York62 counties, pooled by land areaVaries22.0%28.2%48.9%

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

What it means

Wyoming County, Questions

Questions about radon in Wyoming County

Are radon levels high in Wyoming County?

In 2023, 20.0% of the radon tests reported to CDC for Wyoming County, New York were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.9 pCi/L. Of 61 New York counties with 30 or more tests for the same period, 9 reported a higher share; pooled, the state comes to 24.5%.

Which counties border Wyoming County?

Wyoming County borders 5 counties: Genesee County, Livingston County, Erie County, Allegany County and Cattaraugus County.

Products

Wyoming County, Products

Testing a home in Wyoming County

In Wyoming County, 39.3% of 338 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 24.5% pooled across New York. In Zone 1 the year-round level in Wyoming 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

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

Explore

Wyoming County, Bordering counties

Counties bordering Wyoming County

Calculated by Radon411

Wyoming County, Cities and towns

Cities and towns in Wyoming County

About 39,741 people live in Wyoming County by the Census Bureau's estimate for July 1, 2025, 523 fewer than in 2020 (−1.3%). That works out to 67 people per square mile of land. No town dominates: Warsaw, the largest, has 3,592 residents, 9.0% of the total. Testing is reported here more often than across the state: CDC's 338 reported tests for 2008 to 2017 come to 8.5 for every 1,000 residents (2025 estimate), against 4.9 for New York.

From Warsaw to Gainesville, CDC publishes no figure by town: each reads Wyoming County's.

The cities and towns in Wyoming County by residents, July 1, 2025
PlaceResidentsSince 2020Share of residents
Warsaw3,592−1.2%9.0%
Perry3,546−2.3%8.9%
Atticaextends beyond Wyoming County2,421−2.2%Counted whole
Arcade1,911−2.1%4.8%
Castile978−1.9%2.5%
Silver Springs708−1.9%1.8%
Wyoming376−3.1%0.9%
Gainesville220−2.7%0.6%

8 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 Wyoming County is counted whole, so it has no share.

Wyoming County, Homes

Homes in Wyoming County

Wyoming County is a place of houses on their own lots: 77% of its 18,204 homes are detached single-family houses, against 41% across New York. Half of its homes were built before 1961, close to New York's 1958: 49% date from before 1960 and 10% from 2000 or later. Owners live in 77% of the occupied homes (New York: 54%), so for most households a test and a fix are their own to order.

Homes in Wyoming County, New York, 2019 to 2023
HomesWyoming CountyNew York
Housing units18,2048,539,536
Detached houses77%41%
In buildings of 5 or more4%34%
Mobile homes9%2%
Built before 196049%53%
Built since 200010%12%
Middle year built19611958
Owner-occupied77%54%

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