Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
Locations and reports
Radon Levels in Montgomery County, New York
EPA puts Montgomery County in Zone 2, its middle radon zone, and only 6 radon tests from it are on file with CDC (2022). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
15.6%
9.3 pts below NY
- Montgomery
- 15.6%
- New York
- 24.9%
256 tests, 2007 to 2016
Median result
1.6pCi/L
Below action level
- Montgomery
- 1.6 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2007 to 2016
Tests reported
256
51st of 61 by tests
- Montgomery
- 256
- Erie
- 12,998
Reported to CDC before any fix, 2007 to 2016
EPA radon zone
Zone 2
Moderate potential
- 1
- Zone 2
- 3
1 highest, 3 lowest
EPA predicts 2 to 4 pCi/L indoors
Rank in New York
46 of 61
Middle half
- Montgomery
- 15.6%
- Chemung
- 51.7%
By share, of 61 with 30+ tests
Read a result for Montgomery County
Starts at Montgomery County's median, 1.6 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.6 pCi/L
Below 2 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is below 2 pCi/L, the level at which EPA says a fix should be considered. Montgomery County's median reported result, 2007 to 2016.
The data
Montgomery County, At a glance
Montgomery County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Montgomery County is a
USGS geologic potential: Moderate across 100% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Montgomery County, 2022
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 40.0% |
| 2015 | 50.0% |
| 2016 | 14.3% |
| 2017 | 50.0% |
| 2018 | 0.0% |
| 2019 | 0.0% |
| 2020 | 0.0% |
| 2022 | 50.0% |
2022: 50.0%. Across these years the share ran from 0.0% to 50.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 6 tests were reported to CDC for Montgomery County over 2022, 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: 2022. Measured data period: 2005 to 2022 (every CDC figure on file).
Montgomery County, Compared
Montgomery County radon figures, compared
Calculated by Radon411Montgomery County's 256 reported tests over the 2007 to 2016 laboratory totals had a middle value of 1.6 pCi/L and a maximum of 27.0 pCi/L, and 15.6% reached 4 pCi/L. New York as a whole (62 New York counties, pooled) comes to 24.9%: 9.3 points higher than here.
The newest figure, in 2022, counts only 6 tests (50.0% at or above 4 pCi/L), too few to compare, so this reading uses the 256-test figure.
Among its state's counties it ranks 46th of 61 New York counties with 30 or more tests for the same period. Statewide for the same period, Chemung County reported the highest share (51.7%) and Bronx County the lowest (2.3%).
Below the action level, 151 tests (59.0%) came in under 2 pCi/L, against 51.6% statewide, and 65 tests (25.4%) fell between 2 and 4, against 23.5% statewide. The busiest year on file was 2016, with 7 tests reported; the quietest, 2020, had 3.
EPA's 1993 zone map puts Montgomery County in Zone 2, a predicted county average between 2 and 4 pCi/L. USGS geology rates 100% of the county's land moderate radon potential.
Next door, the shares run from 12.1% in Fulton County to 42.4% in Herkimer County, with Fulton County below Montgomery County.
CDC also counts 6 tests taken after mitigation in Montgomery County for the same period: tests in homes where a fix was already in.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Montgomery County, State data
New York's own radon test data
MeasuredWhat New York's own agencies publish about radon tests in Montgomery 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 Montgomery 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
32.3%
Average result
2.7 pCi/L
Tests behind these figures
6.2 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.
Montgomery County, Geology
The ground under Montgomery County
PredictedMost of the ground under Montgomery County is one class on USGS's geologic map: 99.9% of its land is moderate radon potential, with 0.1% low. All of it lies in the area the map calls Hudson-Mohawk Lowland, to which USGS gives a radon index of 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Hudson-Mohawk Lowland | Sandstone, siltstone, shale, and conglomerates. | Moderate | 11 | 99.9% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Montgomery County beside the ground around it
Across New York 48.9% of the land is rated high; none of Montgomery County's is. Of the 6 counties that border it, 4 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
Montgomery County, Local resources
Radon testing and mitigation in Montgomery 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
Montgomery County, Questions
Questions about radon in Montgomery County
Are radon levels high in Montgomery County?
In 2022, 50.0% of the radon tests reported to CDC for Montgomery County, New York were at or above 4 pCi/L, and the median reported pre-mitigation result was 5.8 pCi/L. Of 61 New York counties with 30 or more tests for the same period, 45 reported a higher share; pooled, the state comes to 24.9%.
Which counties border Montgomery County?
Montgomery County borders 6 counties: Fulton County, Schenectady County, Schoharie County, Saratoga County, Otsego County and Herkimer County.
Products
Montgomery County, Products
Testing a home in Montgomery County
In Montgomery County, 15.6% of 256 tests reported to CDC over the 2007 to 2016 laboratory totals reached 4 pCi/L, against 24.9% pooled across New York. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Montgomery County; a long-term test tells the year-round average.
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
Monitor
Corentium Home battery digital radon detector
- C-NRPP 2024/25: Approved
- Battery
- Screen
Method: Alpha spectrometry
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Montgomery County, Bordering counties
Counties bordering Montgomery County
Calculated by Radon411- Radon levels in Herkimer CountyEPA zone 3
42.4%at or above 4 pCi/L
Median 3.1 pCi/L · 337 tests · 26.8 points above Montgomery County
- Radon levels in Otsego CountyEPA zone 1
37.1%at or above 4 pCi/L
Median 2.7 pCi/L · 1,354 tests · 21.5 points above Montgomery County
- Radon levels in Saratoga CountyEPA zone 2
22.9%at or above 4 pCi/L
Median 2.1 pCi/L · 4,134 tests · 7.3 points above Montgomery County
- Radon levels in Schoharie CountyEPA zone 1
22.2%at or above 4 pCi/L
Median 1.8 pCi/L · 500 tests · 6.6 points above Montgomery County
- Radon levels in Schenectady CountyEPA zone 2
18.4%at or above 4 pCi/L
Median 1.7 pCi/L · 1,971 tests · 2.8 points above Montgomery County
- Radon levels in Fulton CountyEPA zone 3
12.1%at or above 4 pCi/L
Median 1.2 pCi/L · 321 tests · 3.5 points below Montgomery County
Montgomery County, Cities and towns
Cities and towns in Montgomery County
The Census Bureau estimates 50,046 residents in Montgomery County for July 1, 2025, 547 more than in 2020 (+1.1%). That works out to 124 people per square mile of land. Its largest town, Amsterdam, has 18,093 residents, 36.2% of the total. CDC's 256 reported tests for 2007 to 2016 work out to 5.1 per 1,000 residents (2025 estimate), close to New York's 4.6.
From Amsterdam to Fort Johnson, CDC publishes no figure by town: each reads Montgomery County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Amsterdam | 18,093 | −0.5% | 36.2% |
| Canajoharie | 2,059 | −1.2% | 4.1% |
| Fort Plain | 2,005 | −0.5% | 4.0% |
| St. Johnsville | 1,706 | −1.0% | 3.4% |
| Hagaman | 1,119 | −1.1% | 2.2% |
| Palatine Bridge | 792 | −0.1% | 1.6% |
| Fultonville | 790 | +5.9% | 1.6% |
| Fonda | 688 | −1.0% | 1.4% |
| Nelliston | 564 | Level | 1.1% |
| Ames | 138 | −2.8% | 0.3% |
- Fort Johnson
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).
Montgomery County, Homes
Homes in Montgomery County
Of Montgomery County's 22,944 homes, 58% are detached houses, against 41% across New York; 7% are mobile homes. The homes are older than New York's as a whole: half were built before 1944 (1958 for New York), and 65% date from before 1960. 69% 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 | Montgomery County | New York |
|---|---|---|
| Housing units | 22,944 | 8,539,536 |
| Detached houses | 58% | 41% |
| In buildings of 5 or more | 6% | 34% |
| Mobile homes | 7% | 2% |
| Built before 1960 | 65% | 53% |
| Built since 2000 | 7% | 12% |
| Middle year built | 1944 | 1958 |
| Owner-occupied | 69% | 54% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.