Short-term kit
RA100 short-term liquid scintillation radon test kit
- Lab fee extra
Method: Liquid scintillation
In home: 48 to 96 hours
Locations and reports
Radon Levels in Fredericksburg city, Virginia
EPA puts Fredericksburg city in Zone 3, its lowest radon zone, and 26.1% of its 375 reported radon tests (2008 to 2017, laboratory totals) were 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
26.1%
4.3 pts below VA
- Fredericksburg city
- 26.1%
- Virginia
- 30.4%
375 tests, 2008 to 2017
Median result
2.3pCi/L
Below action level
- Fredericksburg city
- 2.3 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
375
33rd of 84 by tests
- Fredericksburg city
- 375
- Fairfax
- 8,657
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 Virginia
62 of 84
Middle half
- Fredericksburg city
- 26.1%
- Russell
- 67.3%
By share, of 84 with 30+ tests
Read a result for Fredericksburg city
Starts at Fredericksburg city's median, 2.3 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 2.3 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. Fredericksburg city's median reported result, 2008 to 2017.
The data
Fredericksburg city, At a glance
Fredericksburg city at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 76% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Fredericksburg city, 2008 to 2017, laboratory
Under 2 pCi/L: 45%2 to 4 pCi/L: 29%4 pCi/L and above: 26%
Of 375 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 169 | 45.1% |
| 2 to 4 pCi/L | 108 | 28.8% |
| 4 pCi/L and above | 98 | 26.1% |
What these figures count
These are the 375 tests reported to CDC for Fredericksburg city 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).
Fredericksburg city, Compared
Fredericksburg city radon figures, compared
Calculated by Radon411Fredericksburg city's 375 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.3 pCi/L and a maximum of 18.1 pCi/L, and 26.1% reached 4 pCi/L. Virginia as a whole (131 Virginia counties, pooled) comes to 30.4%: 4.3 points higher than here.
Among its state's counties it ranks 62nd of 84 Virginia counties with 30 or more tests for the same period. Statewide for the same period, Russell County reported the highest share (67.3%) and Norfolk city the lowest (2.7%).
Below the action level, 169 tests (45.1%) came in under 2 pCi/L, against 44.7% statewide, and 108 tests (28.8%) fell between 2 and 4, against 24.9% statewide. CDC's ten-year totals for Fredericksburg city went from 209 tests (2005 to 2014) to 375 (2008 to 2017), the share going from 24.9% to 26.1%.
EPA's 1993 zone map puts Fredericksburg city in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 76% of the county's land low radon potential.
Next door, the shares run from 31.4% in Stafford County to 34.2% in Spotsylvania County.
CDC also counts 54 tests taken after mitigation in Fredericksburg city 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.
Fredericksburg city, Geology
The ground under Fredericksburg city
PredictedMost of the ground under Fredericksburg city is one class on USGS's geologic map: 75.6% of its land is low radon potential, with 24.4% high. The map puts 75.6% of Fredericksburg city in the area it calls Cretaceous Coastal Plain Sediments and 24.4% in Goochland Terrane. USGS gives the first a radon index of 8, in the low band (5 to 8), and the second 13, in the high band (12 to 17).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Cretaceous Coastal Plain Sediments | Cretaceous Coastal Plain sand, silt, clay. | Low | 8 | 75.6% |
| Goochland Terrane | Granite, pegmatites, granitic gneiss, schist and gneiss, slate, and phyllite. | High | 13 | 24.4% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Fredericksburg city beside the ground around it
Virginia as a whole has more high-potential ground than Fredericksburg city: 47.9% of its land, against 24.4% here. Every one of the 2 counties that border it has more high-potential ground, Spotsylvania County the most at 88.1%.
The map rates the ground, not the air in any home.
Local help
Fredericksburg city, Local resources
Radon testing and mitigation in Fredericksburg city
- 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
Fredericksburg city, Questions
Questions about radon in Fredericksburg city
Are radon levels high in Fredericksburg city?
Over the 2008 to 2017 laboratory totals, 26.1% of the radon tests reported to CDC for Fredericksburg city, Virginia were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.3 pCi/L. Of 84 Virginia counties with 30 or more tests for the same period, 61 reported a higher share; pooled, the state comes to 30.4%.
Which counties border Fredericksburg city?
Fredericksburg city borders 2 counties: Stafford County and Spotsylvania County.
Products
Fredericksburg city, Products
Testing a home in Fredericksburg city
In Fredericksburg city, 26.1% of 375 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 30.4% pooled across Virginia. 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 Fredericksburg city.
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
MonitorForensics Detectors
FD-65-RADON rechargeable radon detector with a color screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 6 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Fredericksburg city, Bordering counties
Counties bordering Fredericksburg city
Calculated by Radon411- Radon levels in Spotsylvania CountyEPA zone 1
34.2%at or above 4 pCi/L
Median 2.7 pCi/L · 1,872 tests · 8.1 points above Fredericksburg city
- Radon levels in Stafford CountyEPA zone 1
31.4%at or above 4 pCi/L
Median 2.5 pCi/L · 2,758 tests · 5.3 points above Fredericksburg city
Fredericksburg city, Cities and towns
Cities and towns in Fredericksburg city
Fredericksburg city is growing: the Census Bureau puts it at 30,393 residents on July 1, 2025, up 8.6% from 27,997 in 2020. Packed into its land, that is 2,908 people per square mile. Fredericksburg, its one incorporated place, has 30,393 residents, 100.0% of the total. Testing is reported here more often than across the state: CDC's 375 reported tests for 2008 to 2017 come to 12.3 for every 1,000 residents (2025 estimate), against 6.0 for Virginia.
Fredericksburg is the one incorporated place here; CDC publishes no figure by town, so it reads Fredericksburg city's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Fredericksburg | 30,393 | +8.6% | 100.0% |
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).
Fredericksburg city, Homes
Homes in Fredericksburg city
Fredericksburg city has 12,308 homes, and many share a building: 42% are in buildings of five or more, 40% are detached houses, against 61% across Virginia. Half of its homes were built before 1986, close to Virginia's 1984: 23% date from before 1960 and 37% from 2000 or later. Most occupied homes here are rented: owners live in 42% (Virginia: 67%). A tenant can run a test; a fix is the landlord's to make.
| Homes | Fredericksburg city | Virginia |
|---|---|---|
| Housing units | 12,308 | 3,654,784 |
| Detached houses | 40% | 61% |
| In buildings of 5 or more | 42% | 19% |
| Mobile homes | under 1% | 4% |
| Built before 1960 | 23% | 19% |
| Built since 2000 | 37% | 25% |
| Middle year built | 1986 | 1984 |
| Owner-occupied | 42% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.