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 Warren County, New York
EPA puts Warren County in Zone 3, its lowest radon zone, and only 2 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
15.7%
8.8 pts below NY
- Warren
- 15.7%
- New York
- 24.5%
2,553 tests, 2008 to 2017
Median result
1.6pCi/L
Below action level
- Warren
- 1.6 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
2,553
11th of 61 by tests
- Warren
- 2,553
- 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
44 of 61
Middle half
- Warren
- 15.7%
- Chemung
- 52.3%
By share, of 61 with 30+ tests
Read a result for Warren County
Starts at Warren 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. Warren County's median reported result, 2008 to 2017.
The data
Warren County, At a glance
Warren County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 94% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Warren County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 3.0% |
| 2015 | 50.0% |
| 2016 | 6.3% |
| 2017 | 15.0% |
| 2018 | 14.3% |
| 2019 | 7.7% |
| 2020 | 23.1% |
| 2021 | 0.0% |
| 2023 | 50.0% |
2023: 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 2 tests were reported to CDC for Warren 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).
Warren County, Compared
Warren County radon figures, compared
Calculated by Radon411Warren County's 2,553 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.6 pCi/L and a maximum of 65.6 pCi/L, and 15.7% reached 4 pCi/L. New York as a whole (62 New York counties, pooled) comes to 24.5%: 8.8 points higher than here.
The newest figure, in 2023, counts only 2 tests (50.0% at or above 4 pCi/L), too few to compare, so this reading uses the 2,553-test figure.
Among its state's counties it ranks 44th 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 (52.3%) and Bronx County the lowest (3.2%).
Below the action level, 1,494 tests (58.5%) came in under 2 pCi/L, against 51.7% statewide, and 659 tests (25.8%) fell between 2 and 4, against 23.7% statewide. The busiest year on file was 2014, with 99 tests reported; the quietest, 2023, had 2.
EPA's 1993 zone map puts Warren County in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 94% of the county's land low radon potential.
Next door, the shares run from 10.5% in Essex County to 25.6% in Washington County, with Essex County below Warren County.
CDC also counts 63 tests taken after mitigation in Warren 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.
Warren County, State data
New York's own radon test data
MeasuredWhat New York's own agencies publish about radon tests in Warren 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 Warren 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
15.4%
Average result
2.2 pCi/L
Tests behind these figures
10.4 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.
Warren County, Geology
The ground under Warren County
PredictedMost of the ground under Warren County is one class on USGS's geologic map: 94.3% of its land is low radon potential, with 5.7% moderate. The map puts 94.3% of Warren County in the area it calls Adirondacks and 5.7% in Hudson-Mohawk Lowland. 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 | 94.3% |
| Hudson-Mohawk Lowland | Sandstone, siltstone, shale, and conglomerates. | Moderate | 11 | 5.7% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Warren County beside the ground around it
Across New York 48.9% of the land is rated high; none of Warren County's is. Of the 4 counties that border it, 2 have more high-potential ground, Washington County the most at 53.7%.
The map rates the ground, not the air in any home.
Local help
Warren County, Local resources
Radon testing and mitigation in Warren 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
Warren County, Questions
Questions about radon in Warren County
Are radon levels high in Warren County?
In 2023, 50.0% of the radon tests reported to CDC for Warren County, New York were at or above 4 pCi/L, and the median reported pre-mitigation result was 4.8 pCi/L. Of 61 New York counties with 30 or more tests for the same period, 43 reported a higher share; pooled, the state comes to 24.5%.
Which counties border Warren County?
Warren County borders 4 counties: Washington County, Saratoga County, Hamilton County and Essex County.
Products
Warren County, Products
Testing a home in Warren County
In Warren County, 15.7% of 2,553 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 Warren 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
MonitorX-Sense
XR0B-SR battery digital radon monitor with an alarm
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Alpha spectrometry
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Warren County, Bordering counties
Counties bordering Warren County
Calculated by Radon411- Radon levels in Hamilton CountyEPA zone 3
27.3%at or above 4 pCi/L
Median 1.5 pCi/L · 11 tests · 11.6 points above Warren County
- Radon levels in Washington CountyEPA zone 1
25.6%at or above 4 pCi/L
Median 2.0 pCi/L · 1,593 tests · 9.9 points above Warren County
- Radon levels in Saratoga CountyEPA zone 2
22.3%at or above 4 pCi/L
Median 2.0 pCi/L · 4,449 tests · 6.6 points above Warren County
- Radon levels in Essex CountyEPA zone 3
10.5%at or above 4 pCi/L
Median 1.3 pCi/L · 133 tests · 5.2 points below Warren County
Warren County, Cities and towns
Cities and towns in Warren County
About 65,020 people live in Warren County by the Census Bureau's estimate for July 1, 2025, 577 fewer than in 2020 (−0.9%). That works out to 75 people per square mile of land. Its largest town, Glens Falls, has 14,383 residents, 22.1% of the total. Together its 2 incorporated places hold 23.6% of those residents; the other 76.4% live outside any of them. Testing is reported here more often than across the state: CDC's 2,553 reported tests for 2008 to 2017 come to 39.3 for every 1,000 residents (2025 estimate), against 4.9 for New York.
From Glens Falls to Lake George, CDC publishes no figure by town: each reads Warren County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Glens Falls | 14,383 | −2.7% | 22.1% |
| Lake George | 975 | −0.9% | 1.5% |
2 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).
Warren County, Homes
Homes in Warren County
Of Warren County's 40,177 homes, 72% are detached houses, against 41% across New York; 9% are in buildings of five or more homes. Much of Warren County is recent building: 16% of its homes have gone up since 2000 and the middle year built is 1973, against 1958 for New York. 71% 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 | Warren County | New York |
|---|---|---|
| Housing units | 40,177 | 8,539,536 |
| Detached houses | 72% | 41% |
| In buildings of 5 or more | 9% | 34% |
| Mobile homes | 5% | 2% |
| Built before 1960 | 38% | 53% |
| Built since 2000 | 16% | 12% |
| Middle year built | 1973 | 1958 |
| Owner-occupied | 71% | 54% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.