Long-term kit
RL416 long-term radon test kit, lab fee included
- Lab fee included
Method: Alpha track
In home: 90 days to 12 months
Locations and reports
Radon Levels in Chenango County, New York
EPA puts Chenango County in Zone 1, its highest radon zone, and only 1 radon test from it is 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
34.9%
10.0 pts above NY
- Chenango
- 34.9%
- New York
- 24.9%
971 tests, 2007 to 2016
Median result
2.6pCi/L
Below action level
- Chenango
- 2.6 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2007 to 2016
Tests reported
971
24th of 61 by tests
- Chenango
- 971
- Erie
- 12,998
Reported to CDC before any fix, 2007 to 2016
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
18 of 61
Middle half
- Chenango
- 34.9%
- Chemung
- 51.7%
By share, of 61 with 30+ tests
Read a result for Chenango County
Starts at Chenango County's median, 2.6 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.6 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. Chenango County's median reported result, 2007 to 2016.
The data
Chenango County, At a glance
Chenango County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Chenango County in
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 Chenango County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 44.4% |
| 2015 | 56.5% |
| 2016 | 50.0% |
| 2017 | 48.0% |
| 2018 | 50.0% |
| 2019 | 10.8% |
| 2020 | 20.0% |
| 2023 | 100.0% |
2023: 100.0%. Across these years the share ran from 10.8% to 100.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 1 test was reported to CDC for Chenango 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).
Chenango County, Compared
Chenango County radon figures, compared
Calculated by Radon411In Chenango County, about 3 in 10 reported tests over the 2007 to 2016 laboratory totals (339 of 971) were at or above EPA's action level. Against the national pool of 35.8%, the gap is 0.9 points lower. Across 62 New York counties pooled together, 24.9% of tests reached that level, so Chenango County runs 10.0 points above its state.
The newest figure, in 2023, counts only 1 test (100.0% at or above 4 pCi/L), too few to compare, so this reading uses the 971-test figure.
Of 5 neighbours with a figure, 3 reported a larger share at or above 4 pCi/L and 2 a smaller one; the spread is 25.0% (Broome County) to 50.4% (Cortland County). By share, Chenango County is 18th of 61 New York counties with 30 or more tests for the same period.
Half the tests came in under 2.6 pCi/L and half over it; the single highest reached 90.0 pCi/L. Below the action level, 402 tests (41.4%) came in under 2 pCi/L, against 51.6% statewide, and 230 tests (23.7%) fell between 2 and 4, against 23.5% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 34.9% share point the same way here. USGS geology rates 100% of the county's land high radon potential.
The busiest year on file was 2019, with 65 tests reported; the quietest, 2023, had 1.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Chenango County, State data
New York's own radon test data
MeasuredWhat New York's own agencies publish about radon tests in Chenango 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 Chenango 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
49.1%
Average result
8.2 pCi/L
Tests behind these figures
10.6 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.
Chenango County, Geology
The ground under Chenango County
PredictedUSGS's geologic map puts all of Chenango 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.
Chenango County beside the ground around it
Chenango 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; Broome County comes nearest at 100%.
The map rates the ground, not the air in any home.
Local help
Chenango County, Local resources
Radon testing and mitigation in Chenango 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
Chenango County, Questions
Questions about radon in Chenango County
Are radon levels high in Chenango County?
In 2023, 100.0% of the radon tests reported to CDC for Chenango County, New York were at or above 4 pCi/L, and the median reported pre-mitigation result was 21.3 pCi/L. Of 61 New York counties with 30 or more tests for the same period, 17 reported a higher share; pooled, the state comes to 24.9%.
Which counties border Chenango County?
Chenango County borders 5 counties: Broome County, Cortland County, Otsego County, Madison County and Delaware County.
Products
Chenango County, Products
Testing a home in Chenango County
In Chenango County, 34.9% of 971 tests reported to CDC over the 2007 to 2016 laboratory totals reached 4 pCi/L, against 24.9% pooled across New York. In Zone 1 the year-round level in Chenango 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
MonitorX-Sense
XR0A-SR battery digital radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Screen
Method: Alpha spectrometry
First reading: Within 24 hours
Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Chenango County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Chenango County
Explore
Chenango County, Bordering counties
Counties bordering Chenango County
Calculated by Radon411- Radon levels in Cortland CountyEPA zone 1
50.4%at or above 4 pCi/L
Median 4.0 pCi/L · 736 tests · 15.5 points above Chenango County
- Radon levels in Otsego CountyEPA zone 1
37.1%at or above 4 pCi/L
Median 2.7 pCi/L · 1,354 tests · 2.2 points above Chenango County
- Radon levels in Madison CountyEPA zone 1
35.8%at or above 4 pCi/L
Median 2.7 pCi/L · 932 tests · 0.9 points above Chenango County
- Radon levels in Delaware CountyEPA zone 1
26.9%at or above 4 pCi/L
Median 1.8 pCi/L · 931 tests · 8.0 points below Chenango County
- Radon levels in Broome CountyEPA zone 1
25.0%at or above 4 pCi/L
Median 1.8 pCi/L · 6,144 tests · 9.9 points below Chenango County
Chenango County, Cities and towns
Cities and towns in Chenango County
About 45,715 people live in Chenango County by the Census Bureau's estimate for July 1, 2025, 1,356 fewer than in 2020 (−2.9%). That works out to 51 people per square mile of land. No town dominates: Norwich, the largest, has 6,538 residents, 14.3% of the total. Testing is reported here more often than across the state: CDC's 971 reported tests for 2007 to 2016 come to 21.2 for every 1,000 residents (2025 estimate), against 4.6 for New York.
From Norwich to Smyrna, CDC publishes no figure by town: each reads Chenango County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Norwich | 6,538 | −6.7% | 14.3% |
| Greene | 1,420 | −5.5% | 3.1% |
| Sherburne | 1,359 | −2.2% | 3.0% |
| Oxford | 1,322 | −2.4% | 2.9% |
| Bainbridge | 1,248 | −2.3% | 2.7% |
| New Berlin | 906 | −0.7% | 2.0% |
| Afton | 772 | −2.3% | 1.7% |
| Earlvilleextends beyond Chenango County | 763 | −4.1% | Counted whole |
| Smyrna | 202 | −1.9% | 0.4% |
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). A place that extends beyond Chenango County is counted whole, so it has no share.
Chenango County, Homes
Homes in Chenango County
Of Chenango County's 24,460 homes, 64% are detached houses, against 41% across New York; 19% are mobile homes. Much of Chenango County is recent building: 10% of its homes have gone up since 2000 and the middle year built is 1967, against 1958 for New York. Owners live in 76% of the occupied homes (New York: 54%), so for most households a test and a fix are their own to order.
| Homes | Chenango County | New York |
|---|---|---|
| Housing units | 24,460 | 8,539,536 |
| Detached houses | 64% | 41% |
| In buildings of 5 or more | 6% | 34% |
| Mobile homes | 19% | 2% |
| Built before 1960 | 44% | 53% |
| Built since 2000 | 10% | 12% |
| Middle year built | 1967 | 1958 |
| Owner-occupied | 76% | 54% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.