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 Danville city, Virginia
EPA puts Danville city in Zone 1, its highest radon zone, and 35.1% of its 77 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
35.1%
4.7 pts above VA
- Danville city
- 35.1%
- Virginia
- 30.4%
77 tests, 2008 to 2017
Median result
3.0pCi/L
Below action level
- Danville city
- 3.0 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
77
64th of 84 by tests
- Danville city
- 77
- Fairfax
- 8,657
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 Virginia
43 of 84
Middle half
- Danville city
- 35.1%
- Russell
- 67.3%
By share, of 84 with 30+ tests
Read a result for Danville city
Starts at Danville city's median, 3.0 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 3.0 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. Danville city's median reported result, 2008 to 2017.
The data
Danville city, At a glance
Danville city at a glance
Predicted: EPA radon zone
EPA Zone 1: highest predicted potential
EPA puts all of Danville city in
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 Danville city, 2008 to 2017, laboratory
Under 2 pCi/L: 31%2 to 4 pCi/L: 34%4 pCi/L and above: 35%
Of 77 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 24 | 31.2% |
| 2 to 4 pCi/L | 26 | 33.8% |
| 4 pCi/L and above | 27 | 35.1% |
What these figures count
These are the 77 tests reported to CDC for Danville 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).
Danville city, Compared
Danville city radon figures, compared
Calculated by Radon411In Danville city, about 4 in 10 reported tests over the 2008 to 2017 laboratory totals (27 of 77) were at or above EPA's action level. Against the national pool of 35.7%, the gap is 0.6 points lower. Across 131 Virginia counties pooled together, 30.4% of tests reached that level, so Danville city runs 4.7 points above its state.
Of 2 neighbours with a figure, 1 reported a larger share at or above 4 pCi/L and 1 a smaller one; the spread is 14.9% (Caswell County, NC) to 38.4% (Pittsylvania County). By share, Danville city is 43rd of 84 Virginia counties with 30 or more tests for the same period.
Half the tests came in under 3.0 pCi/L and half over it; the single highest reached 23.9 pCi/L. Below the action level, 24 tests (31.2%) came in under 2 pCi/L, against 44.7% statewide, and 26 tests (33.8%) fell between 2 and 4, against 24.9% statewide.
Zone 1 on EPA's map (predicted average above 4 pCi/L) and a 35.1% share point the same way here. USGS geology rates 100% of the county's land moderate radon potential.
CDC's ten-year totals for Danville city went from 76 tests (2005 to 2014) to 77 (2008 to 2017), the share going from 32.9% to 35.1%.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Danville city, Geology
The ground under Danville city
PredictedUSGS's geologic map puts all of Danville city's mapped land in one class: moderate radon potential. All of it lies in the area the map calls Carolina Terrane, 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 |
|---|---|---|---|---|
| Carolina Terrane | Metavolcanic rocks, granite and granitic 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.
Danville city beside the ground around it
Across Virginia 47.9% of the land is rated high; none of Danville city's is. Of the 2 counties that border it, 1 has more high-potential ground, Pittsylvania County the most at 52.3%.
The map rates the ground, not the air in any home.
Local help
Danville city, Local resources
Radon testing and mitigation in Danville 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
Danville city, Questions
Questions about radon in Danville city
Are radon levels high in Danville city?
Over the 2008 to 2017 laboratory totals, 35.1% of the radon tests reported to CDC for Danville city, Virginia were at or above 4 pCi/L, and the median reported pre-mitigation result was 3.0 pCi/L. Of 84 Virginia counties with 30 or more tests for the same period, 42 reported a higher share; pooled, the state comes to 30.4%.
Which counties border Danville city?
Danville city borders 2 counties: Pittsylvania County, VA and Caswell County, NC.
Products
Danville city, Products
Testing a home in Danville city
In Danville city, 35.1% of 77 tests reported to CDC over the 2008 to 2017 laboratory totals reached 4 pCi/L, against 30.4% pooled across Virginia. In Zone 1 the year-round level in Danville city 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
Monitor
EcoBlu plug-in digital radon monitor with a display
- C-NRPP 2024/25: Not included
- Plug-in
- Alarm
- Screen
Method: Ion chamber
First reading: Within 10 minutes
Short-term kit
RA400 short-term liquid scintillation radon test kit, lab fee included
- Lab fee included
Method: Liquid scintillation
In home: 48 to 96 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Danville city is in EPA Zone 1, the highest predicted radon potential. Best radon monitors for Zone 1 counties like Danville city
Explore
Danville city, Bordering counties
Counties bordering Danville city
Calculated by Radon411- Radon levels in Pittsylvania County, VAEPA zone 1
38.4%at or above 4 pCi/L
Median 3.0 pCi/L · 242 tests · 3.3 points above Danville city
- Radon levels in Caswell County, NCEPA zone 2
14.9%at or above 4 pCi/L
Median 1.6 pCi/L · 47 tests · 20.2 points below Danville city
Danville city, Cities and towns
Cities and towns in Danville city
About 41,647 people live in Danville city by the Census Bureau's estimate for July 1, 2025, 925 fewer than in 2020 (−2.2%). That works out to 973 people per square mile of land. Danville, its one incorporated place, has 41,647 residents, 100.0% of the total. Reported testing is thin here: 77 tests over 2008 to 2017, or 1.8 for every 1,000 residents (2025 estimate), where Virginia as a whole comes to 6.0.
Danville is the one incorporated place here; CDC publishes no figure by town, so it reads Danville city's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Danville | 41,647 | −2.2% | 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).
Danville city, Homes
Homes in Danville city
Of Danville city's 22,309 homes, 68% are detached houses, against 61% across Virginia; 20% are in buildings of five or more homes. The homes are older than Virginia's as a whole: half were built before 1961 (1984 for Virginia), and 48% date from before 1960. Most occupied homes here are rented: owners live in 49% (Virginia: 67%). A tenant can run a test; a fix is the landlord's to make.
| Homes | Danville city | Virginia |
|---|---|---|
| Housing units | 22,309 | 3,654,784 |
| Detached houses | 68% | 61% |
| In buildings of 5 or more | 20% | 19% |
| Mobile homes | 4% | 4% |
| Built before 1960 | 48% | 19% |
| Built since 2000 | 5% | 25% |
| Middle year built | 1961 | 1984 |
| Owner-occupied | 49% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.