Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
Locations and reports
Radon Levels in Herkimer County, New York
EPA puts Herkimer County in Zone 3, its lowest radon zone, and only 4 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
41.5%
17.0 pts above NY
- Herkimer
- 41.5%
- New York
- 24.5%
337 tests, 2008 to 2017
Median result
3.1pCi/L
Below action level
- Herkimer
- 3.1 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
337
46th of 61 by tests
- Herkimer
- 337
- Erie
- 13,822
Reported to CDC before any fix, 2008 to 2017
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Rank in New York
6 of 61
Top quarter
- Herkimer
- 41.5%
- Chemung
- 52.3%
By share, of 61 with 30+ tests
Read a result for Herkimer County
Starts at Herkimer County's median, 3.1 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.1 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. Herkimer County's median reported result, 2008 to 2017.
The data
Herkimer County, At a glance
Herkimer County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 64% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Herkimer County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 50.0% |
| 2015 | 33.3% |
| 2016 | 20.0% |
| 2017 | 64.3% |
| 2019 | 33.3% |
| 2020 | 77.8% |
| 2021 | 100.0% |
| 2023 | 50.0% |
2023: 50.0%. Across these years the share ran from 20.0% to 100.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 4 tests were reported to CDC for Herkimer 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).
Herkimer County, Compared
Herkimer County radon figures, compared
Calculated by Radon411In Herkimer County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (140 of 337) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 5.8 points higher. Across 62 New York counties pooled together, 24.5% of tests reached that level, so Herkimer County runs 17.0 points above its state.
The newest figure, in 2023, counts only 4 tests (50.0% at or above 4 pCi/L), too few to compare, so this reading uses the 337-test figure.
Of 6 neighbours with a figure, none reported a larger share at or above 4 pCi/L; the spread is 11.7% (Fulton County) to 37.6% (Otsego County). By share, Herkimer County is 6th of 61 New York counties with 30 or more tests for the same period.
Half the tests came in under 3.1 pCi/L and half over it; the single highest reached 57.6 pCi/L. Below the action level, 115 tests (34.1%) came in under 2 pCi/L, against 51.7% statewide, and 82 tests (24.3%) fell between 2 and 4, against 23.7% statewide.
The reported tests do not follow EPA's Zone 3 label for Herkimer County (predicted average under 2 pCi/L): 41.5% of them reached 4 pCi/L, more than a low-potential zone suggests. USGS geology rates 64% of the county's land low radon potential. CDC also counts 8 tests taken after mitigation in Herkimer County for the same period: tests in homes where a fix was already in.
The busiest year on file was 2017, with 14 tests reported; the quietest, 2021, had 1.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Herkimer County, State data
New York's own radon test data
MeasuredWhat New York's own agencies publish about radon tests in Herkimer 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 Herkimer 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
44.4%
Average result
5.9 pCi/L
Tests behind these figures
5.4 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.
Herkimer County, Geology
The ground under Herkimer County
PredictedUSGS's geologic map splits Herkimer County: 64.1% of its land is low radon potential and 6.0% high and 29.9% moderate. The map puts 64.1% of Herkimer County in the area it calls Adirondacks and 18.2% in Hudson-Mohawk Lowland, with 2 smaller areas beside them. USGS gives the first a radon index of 8, in the low band (5 to 8), and the second 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Adirondacks | Anorthosite and charnockitic gneisses. | Low | 8 | 64.1% |
| Hudson-Mohawk Lowland | Sandstone, siltstone, shale, and conglomerates. | Moderate | 11 | 18.2% |
| Erie-Ontario Lowland | Limestone, dolomite, shale, sandstone, and salt deposits. | Moderate | 9 | 11.7% |
| Allegheny Plateau | Shale, limestone, and sandstone. | High | 12 | 6.0% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Herkimer County beside the ground around it
New York as a whole has more high-potential ground than Herkimer County: 48.9% of its land, against 6.0% here. Of the 7 counties that border it, 2 have more high-potential ground, Otsego County the most at 98.4%.
The map rates the ground, not the air in any home.
Local help
Herkimer County, Local resources
Radon testing and mitigation in Herkimer County
Listed radon businesses with an address in Herkimer 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.
Listed radon professionals by town: Mohawk
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
Herkimer County, Questions
Questions about radon in Herkimer County
Are radon levels high in Herkimer County?
In 2023, 50.0% of the radon tests reported to CDC for Herkimer County, New York were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.6 pCi/L. Of 61 New York counties with 30 or more tests for the same period, 5 reported a higher share; pooled, the state comes to 24.5%.
Which counties border Herkimer County?
Herkimer County borders 7 counties: Hamilton County, Oneida County, Fulton County, Lewis County, Montgomery County, Otsego County and St. Lawrence County.
Products
Herkimer County, Products
Testing a home in Herkimer County
In Herkimer County, 41.5% of 337 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 24.5% pooled across New York. Zone 3 is the lowest label, yet homes at or above 4 pCi/L occur in every zone: a short-term kit (2 to 90 days) is the quick first check in Herkimer County.
Test kits and monitors3
See every kit and monitor
Long-term kit
RL116 long-term radon test kit
- Lab fee extra
Method: Alpha track
In home: 90 days to 12 months
MonitorAEGTEST
HOUND-1011S rechargeable radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 12 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Herkimer County, Bordering counties
Counties bordering Herkimer County
Calculated by Radon411- Radon levels in Otsego CountyEPA zone 1
37.6%at or above 4 pCi/L
Median 2.8 pCi/L · 1,452 tests · 3.9 points below Herkimer County
- Radon levels in Oneida CountyEPA zone 2
34.6%at or above 4 pCi/L
Median 2.5 pCi/L · 2,051 tests · 6.9 points below Herkimer County
- Radon levels in Hamilton CountyEPA zone 3
27.3%at or above 4 pCi/L
Median 1.5 pCi/L · 11 tests · 14.2 points below Herkimer County
- Radon levels in Lewis CountyEPA zone 2
20.2%at or above 4 pCi/L
Median 1.4 pCi/L · 109 tests · 21.3 points below Herkimer County
- Radon levels in Montgomery CountyEPA zone 2
14.7%at or above 4 pCi/L
Median 1.6 pCi/L · 252 tests · 26.8 points below Herkimer County
- Radon levels in St. Lawrence CountyEPA zone 2
13.2%at or above 4 pCi/L
Median 1.2 pCi/L · 151 tests · 28.3 points below Herkimer County
- Radon levels in Fulton CountyEPA zone 3
11.7%at or above 4 pCi/L
Median 1.2 pCi/L · 334 tests · 29.8 points below Herkimer County
Herkimer County, Cities and towns
Cities and towns in Herkimer County
About 59,219 people live in Herkimer County by the Census Bureau's estimate for July 1, 2025, 824 fewer than in 2020 (−1.4%). That works out to 42 people per square mile of land. No town dominates: Ilion, the largest, has 7,488 residents, 12.6% of the total. CDC's 337 reported tests for 2008 to 2017 work out to 5.7 per 1,000 residents (2025 estimate), close to New York's 4.9.
From Ilion to Cold Brook, CDC publishes no figure by town: each reads Herkimer County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Ilion | 7,488 | −2.3% | 12.6% |
| Herkimer | 7,195 | −1.3% | 12.1% |
| Little Falls | 4,481 | −2.1% | 7.6% |
| Mohawk | 2,350 | −2.4% | 4.0% |
| Frankfort | 2,275 | −2.2% | 3.8% |
| Dolgevilleextends beyond Herkimer County | 1,992 | −2.5% | Counted whole |
| West Winfield | 724 | −2.3% | 1.2% |
| Newport | 550 | −2.0% | 0.9% |
| Poland | 474 | −2.5% | 0.8% |
| Middleville | 426 | −2.7% | 0.7% |
| Cold Brook | 255 | −3.0% | 0.4% |
11 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 Herkimer County is counted whole, so it has no share.
Herkimer County, Homes
Homes in Herkimer County
Of Herkimer County's 32,449 homes, 71% are detached houses, against 41% across New York; 9% are mobile homes. Half of its homes were built before 1956, close to New York's 1958: 54% date from before 1960 and 10% from 2000 or later. 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 | Herkimer County | New York |
|---|---|---|
| Housing units | 32,449 | 8,539,536 |
| Detached houses | 71% | 41% |
| In buildings of 5 or more | 6% | 34% |
| Mobile homes | 9% | 2% |
| Built before 1960 | 54% | 53% |
| Built since 2000 | 10% | 12% |
| Middle year built | 1956 | 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.