
Long-term kit![]()
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
Locations and reports
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
338 tests, 2008 to 2017
Median result
3.0pCi/L
Below action level
Midpoint of the tests, 2008 to 2017
Tests reported
338
45th of 61 by tests
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 1
Highest potential
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Rank in New York
10 of 61
Top quarter
By share, of 61 with 30+ tests
Read a result for Wyoming County
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
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
Predicted: EPA radon zone
EPA puts all of Wyoming County in
USGS geologic potential: High across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 20.0% |
| 2015 | 33.3% |
| 2016 | 80.0% |
| 2017 | 60.0% |
| 2018 | 28.6% |
| 2019 | 40.0% |
| 2020 | 66.7% |
| 2021 | 40.0% |
| 2023 | 20.0% |
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.
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).
Wyoming County, Compared
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.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Wyoming County, State data
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.
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
Measured: New York State Department of Health data, 2015-2019.
Wyoming County, Geology
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).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Allegheny Plateau | Shale, limestone, and sandstone. | High | 12 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
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%.
The map rates the ground, not the air in any home.
Local help
Wyoming County, Local resources
Providing patients with information about how low-cost test kits may be obtained from the Radon Program.
NYS does not certify or license radon testers.
What it means
Wyoming County, Questions
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%.
Wyoming County borders 5 counties: Genesee County, Livingston County, Erie County, Allegany County and Cattaraugus County.
Products
Wyoming County, Products
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 monitors: 1 of 3
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
42.6%at or above 4 pCi/L
Median 2.9 pCi/L · 383 tests · 3.3 points above Wyoming County
40.6%at or above 4 pCi/L
Median 3.0 pCi/L · 599 tests · 1.3 points above Wyoming County
38.3%at or above 4 pCi/L
Median 3.1 pCi/L · 519 tests · 1.0 points below Wyoming County
34.7%at or above 4 pCi/L
Median 2.6 pCi/L · 317 tests · 4.6 points below Wyoming County
18.2%at or above 4 pCi/L
Median 1.5 pCi/L · 13,822 tests · 21.1 points below Wyoming County
Wyoming County, Cities and towns
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.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Warsaw | 3,592 | −1.2% | 9.0% |
| Perry | 3,546 | −2.3% | 8.9% |
| Atticaextends beyond Wyoming County | 2,421 | −2.2% | Counted whole |
| Arcade | 1,911 | −2.1% | 4.8% |
| Castile | 978 | −1.9% | 2.5% |
| Silver Springs | 708 | −1.9% | 1.8% |
| Wyoming | 376 | −3.1% | 0.9% |
| Gainesville | 220 | −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
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 | Wyoming County | New York |
|---|---|---|
| Housing units | 18,204 | 8,539,536 |
| Detached houses | 77% | 41% |
| In buildings of 5 or more | 4% | 34% |
| Mobile homes | 9% | 2% |
| Built before 1960 | 49% | 53% |
| Built since 2000 | 10% | 12% |
| Middle year built | 1961 | 1958 |
| Owner-occupied | 77% | 54% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.