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
Radon Levels in Genesee County, New York
EPA puts Genesee County in Zone 1, its highest radon zone, and high results are common there: 46.7% of the 150 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
Share at 4+ pCi/L
46.7%
14.7 pts above NY
- Genesee
- 46.7%
- New York
- 32.0%
150 tests, 2023
Median result
3.6pCi/L
Below action level
- Genesee
- 3.6 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2023
Tests reported
150
2nd of 6 by tests
- Genesee
- 150
- Onondaga
- 224
Reported to CDC before any fix, 2023
EPA radon zone
Zone 1
Highest potential
- Zone 1
- 2
- 3
1 highest, 3 lowest
EPA predicts over 4 pCi/L indoors
Rank in New York
2 of 6
Top quarter
- Genesee
- 46.7%
- Cortland
- 54.9%
By share, of 6 with 30+ tests
Read a result for Genesee County
Starts at Genesee County's median, 3.6 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.6 pCi/L
Between 2 and 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 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. Genesee County's median reported result, 2023.
The data
Genesee County, At a glance
Genesee County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Genesee County in
USGS geologic potential: High across 60% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Genesee County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 25.0% |
| 2015 | 66.7% |
| 2016 | 27.3% |
| 2017 | 23.5% |
| 2018 | 50.0% |
| 2019 | 22.7% |
| 2020 | 33.3% |
| 2021 | 33.3% |
| 2022 | 0.0% |
| 2023 | 46.7% |
2023: 46.7%. Across these years the share ran from 0.0% to 66.7%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
These are the 150 tests reported to CDC for Genesee 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).
Genesee County, Compared
Genesee County radon figures, compared
Calculated by Radon411In Genesee County, about 5 in 10 reported tests in 2023 (70 of 150) were at or above EPA's action level. Against the national pool of 33.4%, the gap is 13.3 points higher. Across 56 New York counties pooled together, 32.0% of tests reached that level, so Genesee County runs 14.7 points above its state.
Of 2 neighbours with a figure, none reported a larger share at or above 4 pCi/L; the spread is 10.0% (Monroe County) to 26.3% (Erie County). By share, Genesee County is 2nd of 6 New York counties with 30 or more tests for the same period.
Year by year, 2017 opened at 23.5% and 2023 closed at 46.7% (up 23.2 points), with 2018 the high at 50.0%. Half the tests came in under 3.6 pCi/L and half over it; the single highest reached 172.5 pCi/L. Below the action level, 51 tests (34.0%) came in under 2 pCi/L, against 44.7% statewide, and 29 tests (19.3%) fell between 2 and 4, against 23.3% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 46.7% share point the same way here. USGS geology rates 60% of the county's land high radon potential.
The busiest year on file was 2023, with 150 tests reported; the quietest, 2022, had 3.
Genesee CountyNew York, pooled
46.7% % of tests32.0% % of tests
| Year | Tests | Genesee County, at or above 4 pCi/L | New York, pooled |
|---|---|---|---|
| 2017 | 98 | 23.5% | 31.6% |
| 2018 | 60 | 50.0% | 26.9% |
| 2019 | 75 | 22.7% | 28.0% |
| 2023 | 150 | 46.7% | 32.0% |
Pooled shares: Radon411's sum of CDC's county counts for one period.
Genesee County, State data
New York's own radon test data
MeasuredWhat New York's own agencies publish about radon tests in Genesee 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 Genesee 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
30.1%
Average result
6.3 pCi/L
Tests behind these figures
54.4 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.
Genesee County, Geology
The ground under Genesee County
PredictedUSGS's geologic map splits Genesee County: 60.3% of its land is high radon potential and 39.7% moderate. The map puts 60.3% of Genesee County in the area it calls Allegheny Plateau and 39.7% in Erie-Ontario Lowland. USGS gives the first a radon index of 12, in the high band (12 to 17), and the second 9, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Allegheny Plateau | Shale, limestone, and sandstone. | High | 12 | 60.3% |
| Erie-Ontario Lowland | Limestone, dolomite, shale, sandstone, and salt deposits. | Moderate | 9 | 39.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Genesee County beside the ground around it
Genesee County has more high-potential ground than New York as a whole: 60.3% of its land against 48.9%. Of the 6 counties that border it, 3 have more high-potential ground, Wyoming County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Genesee County, Local resources
Radon testing and mitigation in Genesee County
- Radon ProgramRadon Program, run by New York State Department of Health, does not license radon professionals and offers free or discounted test kits, and answers questions about testing and mitigation in New York.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsThe program says:
Providing patients with information about how low-cost test kits may be obtained from the Radon Program.
- Compare kits
- Professionals in New York88 professionals are listed in New York.
What New York's program says
- Phone
- 518-402-7556
- radon@health.ny.gov
- Licensing of radon professionals
NYS does not certify or license radon testers.
What it means
Genesee County, Questions
Questions about radon in Genesee County
Are radon levels high in Genesee County?
In 2023, 46.7% of the radon tests reported to CDC for Genesee County, New York were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.6 pCi/L. Of 6 New York counties with 30 or more tests for the same period, 1 reported a higher share; pooled, the state comes to 32.0%.
Which counties border Genesee County?
Genesee County borders 6 counties: Orleans County, Wyoming County, Monroe County, Livingston County, Erie County and Niagara County.
Products
Genesee County, Products
Testing a home in Genesee County
In Genesee County, 46.7% of 150 tests reported to CDC in 2023 reached 4 pCi/L, against 32.0% pooled across New York. In Zone 1 the year-round level in Genesee 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
Monitor
RadonScan USB-powered radon monitor with a color screen
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
First reading: Within 5 minutes
Short-term kitKidde
442020 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 3 days
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Genesee County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Genesee County
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Genesee County, Bordering counties
Counties bordering Genesee County
Calculated by Radon411- Radon levels in Livingston CountyEPA zone 1
33.3%at or above 4 pCi/L
Median 2.9 pCi/L · 6 tests · 13.4 points below Genesee County
- Radon levels in Erie CountyEPA zone 1
26.3%at or above 4 pCi/L
Median 2.0 pCi/L · 38 tests · 20.4 points below Genesee County
- Radon levels in Orleans CountyEPA zone 2
25.0%at or above 4 pCi/L
Median 1.8 pCi/L · 4 tests · 21.7 points below Genesee County
- Radon levels in Wyoming CountyEPA zone 1
20.0%at or above 4 pCi/L
Median 1.9 pCi/L · 5 tests · 26.7 points below Genesee County
- Radon levels in Niagara CountyEPA zone 2
11.1%at or above 4 pCi/L
Median 1.2 pCi/L · 9 tests · 35.6 points below Genesee County
- Radon levels in Monroe CountyEPA zone 2
10.0%at or above 4 pCi/L
Median 1.5 pCi/L · 40 tests · 36.7 points below Genesee County
Genesee County, Cities and towns
Cities and towns in Genesee County
Genesee County's population has barely moved since 2020: 58,416 residents on July 1, 2025 against 58,299 then, by the Census Bureau's estimates. That works out to 119 people per square mile of land. Its largest town, Batavia, has 15,168 residents, 26.0% of the total. Testing is reported here more often than across the state: CDC's 150 reported tests for 2023 come to 2.6 for every 1,000 residents (2025 estimate), against 0.1 for New York.
From Batavia to Alexander, CDC publishes no figure by town: each reads Genesee County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Batavia | 15,168 | Level | 26.0% |
| Le Roy | 4,296 | −2.1% | 7.4% |
| Atticaextends beyond Genesee County | 2,421 | −2.2% | Counted whole |
| Oakfield | 1,794 | −1.6% | 3.1% |
| Bergen | 1,242 | +0.4% | 2.1% |
| Corfu | 724 | +2.1% | 1.2% |
| Elba | 592 | −1.8% | 1.0% |
| Alexander | 489 | −2.4% | 0.8% |
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 Genesee County is counted whole, so it has no share.
Genesee County, Homes
Homes in Genesee County
Of Genesee County's 26,090 homes, 68% are detached houses, against 41% across New York; 8% are in buildings of five or more homes. Half of its homes were built before 1956, close to New York's 1958: 54% date from before 1960 and 7% from 2000 or later. 74% of occupied homes are lived in by their owner (New York: 54%); in the rest a tenant can run a test, but a fix is the landlord's to make.
| Homes | Genesee County | New York |
|---|---|---|
| Housing units | 26,090 | 8,539,536 |
| Detached houses | 68% | 41% |
| In buildings of 5 or more | 8% | 34% |
| Mobile homes | 5% | 2% |
| Built before 1960 | 54% | 53% |
| Built since 2000 | 7% | 12% |
| Middle year built | 1956 | 1958 |
| Owner-occupied | 74% | 54% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.