Short-term kit
PicoCan short-term charcoal canister radon test
- Lab fee included
Method: Charcoal
In home: 48 to 96 hours
Locations and reports
Radon Levels in Rappahannock County, Virginia
EPA puts Rappahannock County in Zone 2, its middle radon zone, and high results are common there: 41.6% of the 137 radon tests reported to CDC (2008 to 2017, laboratory totals) came back at or above 4 pCi/L. Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Share at 4+ pCi/L
41.6%
11.2 pts above VA
- Rappahannock
- 41.6%
- Virginia
- 30.4%
137 tests, 2008 to 2017
Median result
3.3pCi/L
Below action level
- Rappahannock
- 3.3 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
137
51st of 84 by tests
- Rappahannock
- 137
- Fairfax
- 8,657
Reported to CDC before any fix, 2008 to 2017
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 Virginia
25 of 84
Middle half
- Rappahannock
- 41.6%
- Russell
- 67.3%
By share, of 84 with 30+ tests
Read a result for Rappahannock County
Starts at Rappahannock County's median, 3.3 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.3 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. Rappahannock County's median reported result, 2008 to 2017.
The data
Rappahannock County, At a glance
Rappahannock County at a glance
Predicted: EPA radon zone
EPA Zone 2: moderate predicted potential
Rappahannock 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 Rappahannock County, 2008 to 2017, laboratory
Under 2 pCi/L: 31%2 to 4 pCi/L: 28%4 pCi/L and above: 41%
Of 137 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 42 | 30.7% |
| 2 to 4 pCi/L | 38 | 27.7% |
| 4 pCi/L and above | 57 | 41.6% |
What these figures count
These are the 137 tests reported to CDC for Rappahannock County over 2008 to 2017 (laboratory totals), many from homes being sold or already suspected of a problem: they describe the county's reported tests, not this house.
Measured: CDC tracking data. Figure above: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Rappahannock County, Compared
Rappahannock County radon figures, compared
Calculated by Radon411In Rappahannock County, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (57 of 137) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 5.9 points higher. Across 131 Virginia counties pooled together, 30.4% of tests reached that level, so Rappahannock County runs 11.2 points above its state.
Of 5 neighbours with a figure, 1 reported a larger share at or above 4 pCi/L and 4 a smaller one; the spread is 30.2% (Fauquier County) to 44.0% (Madison County). By share, Rappahannock County is 25th of 84 Virginia counties with 30 or more tests for the same period.
Half the tests came in under 3.3 pCi/L and half over it; the single highest reached 26.1 pCi/L. Below the action level, 42 tests (30.7%) came in under 2 pCi/L, against 44.7% statewide, and 38 tests (27.7%) fell between 2 and 4, against 24.9% statewide.
Zone 2 on EPA's map (predicted average between 2 and 4 pCi/L) and a 41.6% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential. CDC also counts 13 tests taken after mitigation in Rappahannock County for the same period: tests in homes where a fix was already in.
CDC's ten-year totals for Rappahannock County went from 71 tests (2005 to 2014) to 137 (2008 to 2017), the share going from 45.1% to 41.6%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Rappahannock County, Geology
The ground under Rappahannock County
PredictedUSGS's geologic map puts all of Rappahannock County's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Blue Ridge, to which USGS gives a radon index of 10, in the moderate band (9 to 11).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Blue Ridge | Granite, pegmatite, monazite, schist, and gneiss. | Moderate | 10 | 100% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Rappahannock County beside the ground around it
Across Virginia 47.9% of the land is rated high; none of Rappahannock County's is. Every one of the 5 counties that border it has more high-potential ground, Page County the most at 68.8%.
The map rates the ground, not the air in any home.
Local help
Rappahannock County, Local resources
Radon testing and mitigation in Rappahannock County
- VDH Radon ProgramVDH Radon Program answers questions about testing, mitigation and the rules in Virginia.Visit the program’s page(opens in a new tab)
- Free and low-cost kitsAsk the program whether it has free or discounted kits, or compare kits you can buy.
- Compare kits
- Professionals in Virginia2 professionals are listed in Virginia.
What Virginia's program says
- Phone
- (804) 864-8161
- Radon@vdh.virginia.gov
- Licensing of radon professionals
The Code of Virginia requires that Radon testers and mitigators be currently certified by either the National Radon Proficiency Program (NRPP) or the National Radon Safety Board (NRSB).
What it means
Rappahannock County, Questions
Questions about radon in Rappahannock County
Are radon levels high in Rappahannock County?
Over the 2008 to 2017 laboratory totals, 41.6% of the radon tests reported to CDC for Rappahannock County, Virginia were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.3 pCi/L. Of 84 Virginia counties with 30 or more tests for the same period, 24 reported a higher share; pooled, the state comes to 30.4%.
Which counties border Rappahannock County?
Rappahannock County borders 5 counties: Warren County, Culpeper County, Fauquier County, Madison County and Page County.
Products
Rappahannock County, Products
Testing a home in Rappahannock County
In Rappahannock County, 41.6% of 137 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 30.4% pooled across Virginia. In Zone 2 a short-term kit (2 to 90 days) is the quick first check in Rappahannock County; a long-term test tells the year-round average.
Test kits and monitors3
See every kit and monitor
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
MonitorAranet
Radon Plus battery digital radon monitor with an e-ink screen
- C-NRPP 2024/25: Approved
- Battery
- Bluetooth
- Alarm
- Screen, app
Method: Ion chamber
First reading: Within 10 minutes
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Rappahannock County, Bordering counties
Counties bordering Rappahannock County
Calculated by Radon411- Radon levels in Madison CountyEPA zone 2
44.0%at or above 4 pCi/L
Median 3.5 pCi/L · 184 tests · 2.4 points above Rappahannock County
- Radon levels in Culpeper CountyEPA zone 2
40.1%at or above 4 pCi/L
Median 3.2 pCi/L · 891 tests · 1.5 points below Rappahannock County
- Radon levels in Page CountyEPA zone 1
38.3%at or above 4 pCi/L
Median 3.3 pCi/L · 141 tests · 3.3 points below Rappahannock County
- Radon levels in Warren CountyEPA zone 1
36.9%at or above 4 pCi/L
Median 2.7 pCi/L · 536 tests · 4.7 points below Rappahannock County
- Radon levels in Fauquier CountyEPA zone 2
30.2%at or above 4 pCi/L
Median 2.5 pCi/L · 1,199 tests · 11.4 points below Rappahannock County
Rappahannock County, Cities and towns
Cities and towns in Rappahannock County
The Census Bureau estimates 7,439 residents in Rappahannock County for July 1, 2025, 117 more than in 2020 (+1.6%). That works out to 28 people per square mile of land. Washington, its one incorporated place, has 84 residents, 1.1% of the total. Testing is reported here more often than across the state: CDC's 137 reported tests for 2008 to 2017 come to 18.4 for every 1,000 residents (2025 estimate), against 6.0 for Virginia.
Washington is the one incorporated place here; CDC publishes no figure by town, so it reads Rappahannock County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Washington | 84 | Level | 1.1% |
One incorporated place, 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).
Rappahannock County, Homes
Homes in Rappahannock County
Rappahannock County is a place of houses on their own lots: 96% of its 3,848 homes are detached single-family houses, against 61% across Virginia. Half of its homes were built before 1981, close to Virginia's 1984: 26% date from before 1960 and 19% from 2000 or later. Owners live in 78% of the occupied homes (Virginia: 67%), so for most households a test and a fix are their own to order.
| Homes | Rappahannock County | Virginia |
|---|---|---|
| Housing units | 3,848 | 3,654,784 |
| Detached houses | 96% | 61% |
| In buildings of 5 or more | 2% | 19% |
| Mobile homes | 0% | 4% |
| Built before 1960 | 26% | 19% |
| Built since 2000 | 19% | 25% |
| Middle year built | 1981 | 1984 |
| Owner-occupied | 78% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.