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 Washington County, New York
EPA puts Washington County in Zone 1, its highest 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
25.6%
1.1 pts above NY
- Washington
- 25.6%
- New York
- 24.5%
1,593 tests, 2008 to 2017
Median result
2.0pCi/L
Below action level
- Washington
- 2.0 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
1,593
16th of 61 by tests
- Washington
- 1,593
- Erie
- 13,822
Reported to CDC before any fix, 2008 to 2017
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
30 of 61
Middle half
- Washington
- 25.6%
- Chemung
- 52.3%
By share, of 61 with 30+ tests
Read a result for Washington County
Starts at Washington County's median, 2.0 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.0 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. Washington County's median reported result, 2008 to 2017.
The data
Washington County, At a glance
Washington County at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Washington County in
USGS geologic potential: High across 54% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Washington County, 2023
| Year | Share of reported tests at or above 4 pCi/L |
|---|---|
| 2014 | 30.0% |
| 2015 | 37.5% |
| 2016 | 38.9% |
| 2017 | 0.0% |
| 2018 | 14.3% |
| 2019 | 33.3% |
| 2020 | 0.0% |
| 2021 | 62.5% |
| 2022 | 100.0% |
| 2023 | 50.0% |
2023: 50.0%. Across these years the share ran from 0.0% to 100.0%. Each column counts radon tests reported to CDC that year, not homes.
What these figures count
Only 2 tests were reported to CDC for Washington 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).
Washington County, Compared
Washington County radon figures, compared
Calculated by Radon411Washington County's 1,593 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.0 pCi/L and a maximum of 77.0 pCi/L, and 25.6% reached 4 pCi/L. New York as a whole (62 New York counties, pooled) comes to 24.5%: 1.1 points lower 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 1,593-test figure.
Among its state's counties it ranks 30th 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, 782 tests (49.1%) came in under 2 pCi/L, against 51.7% statewide, and 403 tests (25.3%) fell between 2 and 4, against 23.7% statewide. The busiest year on file was 2014, with 20 tests reported; the quietest, 2023, had 2.
EPA's 1993 zone map puts Washington County in Zone 1, a predicted county average above 4 pCi/L. USGS geology rates 54% of the county's land high radon potential.
Next door, the shares run from 10.5% in Essex County to 29.5% in Rensselaer County, with Rutland County, VT, Saratoga County and Addison County, VT below Washington County.
CDC also counts 41 tests taken after mitigation in Washington 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.
Washington County, State data
New York's own radon test data
MeasuredWhat New York's own agencies publish about radon tests in Washington 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 Washington 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
25%
Average result
4.0 pCi/L
Tests behind these figures
12.8 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.
Washington County, Geology
The ground under Washington County
PredictedUSGS's geologic map splits Washington County: 53.7% of its land is high radon potential and 25.4% moderate and 20.9% low. The map puts 53.7% of Washington County in the area it calls New England-Taconic Mountains and 24.7% in Hudson-Mohawk Lowland, with 2 smaller areas beside them. USGS gives the first a radon index of 12, in the high band (12 to 17), and the second 11, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| New England-Taconic Mountains | Slate, phyllite, graywacke, and limestone. | High | 12 | 53.7% |
| Hudson-Mohawk Lowland | Sandstone, siltstone, shale, and conglomerates. | Moderate | 11 | 24.7% |
| Adirondacks | Anorthosite and charnockitic gneisses. | Low | 8 | 20.5% |
| Taconic Mountains | Cambrian-Ordovician metasedimentary rocks. | Moderate | 11 | 0.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Washington County beside the ground around it
On high-potential ground Washington County is close to New York as a whole: 53.7% of its land against 48.9%. Of the 7 counties that border it, 1 has more high-potential ground, Rensselaer County the most at 96.8%.
The map rates the ground, not the air in any home.
Local help
Washington County, Local resources
Radon testing and mitigation in Washington 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
Washington County, Questions
Questions about radon in Washington County
Are radon levels high in Washington County?
In 2023, 50.0% of the radon tests reported to CDC for Washington County, New York were at or above 4 pCi/L, and the median reported pre-mitigation result was 10.6 pCi/L. Of 61 New York counties with 30 or more tests for the same period, 29 reported a higher share; pooled, the state comes to 24.5%.
Which counties border Washington County?
Washington County borders 7 counties: Rutland County, VT, Warren County, NY, Bennington County, VT, Saratoga County, NY, Addison County, VT, Rensselaer County, NY and Essex County, NY.
Products
Washington County, Products
Testing a home in Washington County
In Washington County, 25.6% of 1,593 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 24.5% pooled across New York. In Zone 1 the year-round level in Washington 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-iR Wi-Fi battery radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Wi-Fi
- Screen, app
Method: Alpha spectrometry
First reading: Within 24 hours
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
Washington County is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Washington County
Explore
Washington County, Bordering counties
Counties bordering Washington County
Calculated by Radon411- Radon levels in Rensselaer County, NYEPA zone 1
29.5%at or above 4 pCi/L
Median 2.1 pCi/L · 1,577 tests · 3.9 points above Washington County
- Radon levels in Bennington County, VTEPA zone 2
25.8%at or above 4 pCi/L
Median 2.0 pCi/L · 733 tests · 0.2 points above Washington County
- Radon levels in Rutland County, VTEPA zone 2
24.5%at or above 4 pCi/L
Median 1.9 pCi/L · 1,060 tests · 1.1 points below Washington County
- Radon levels in Saratoga County, NYEPA zone 2
22.3%at or above 4 pCi/L
Median 2.0 pCi/L · 4,449 tests · 3.3 points below Washington County
- Radon levels in Addison County, VTEPA zone 2
21.7%at or above 4 pCi/L
Median 1.7 pCi/L · 433 tests · 3.9 points below Washington County
- Radon levels in Warren County, NYEPA zone 3
15.7%at or above 4 pCi/L
Median 1.6 pCi/L · 2,553 tests · 9.9 points below Washington County
- Radon levels in Essex County, NYEPA zone 3
10.5%at or above 4 pCi/L
Median 1.3 pCi/L · 133 tests · 15.1 points below Washington County
Washington County, Cities and towns
Cities and towns in Washington County
About 59,353 people live in Washington County by the Census Bureau's estimate for July 1, 2025, 1,774 fewer than in 2020 (−2.9%). That works out to 71 people per square mile of land. No town dominates: Hudson Falls, the largest, has 7,333 residents, 12.4% of the total. Together its 8 incorporated places hold 33.0% of those residents; the other 67.0% live outside any of them. Testing is reported here more often than across the state: CDC's 1,593 reported tests for 2008 to 2017 come to 26.8 for every 1,000 residents (2025 estimate), against 4.9 for New York.
From Hudson Falls to Argyle, CDC publishes no figure by town: each reads Washington County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Hudson Falls | 7,333 | −1.2% | 12.4% |
| Fort Edward | 3,128 | −1.1% | 5.3% |
| Whitehall | 2,479 | −0.5% | 4.2% |
| Granville | 2,416 | −0.6% | 4.1% |
| Cambridge | 1,815 | −0.1% | 3.1% |
| Greenwich | 1,662 | −0.6% | 2.8% |
| Fort Ann | 473 | Level | 0.8% |
| Argyle | 284 | −0.4% | 0.5% |
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).
Washington County, Homes
Homes in Washington County
Of Washington County's 29,111 homes, 75% are detached houses, against 41% across New York; 6% are in buildings of five or more homes. Half of its homes were built before 1962, close to New York's 1958: 48% date from before 1960 and 14% from 2000 or later. Owners live in 77% of the occupied homes (New York: 54%), so for most households a test and a fix are their own to order.
| Homes | Washington County | New York |
|---|---|---|
| Housing units | 29,111 | 8,539,536 |
| Detached houses | 75% | 41% |
| In buildings of 5 or more | 6% | 34% |
| Mobile homes | 5% | 2% |
| Built before 1960 | 48% | 53% |
| Built since 2000 | 14% | 12% |
| Middle year built | 1962 | 1958 |
| Owner-occupied | 77% | 54% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.