Short-term kitFirst Alert
RD1 short-term charcoal radon test kit
- Lab fee included
Method: Charcoal
In home: 2 to 4 days
Locations and reports
Radon Levels in Hanover County, Virginia
EPA puts Hanover County in Zone 3, its lowest radon zone, and 23.0% of its 165 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
23.0%
7.4 pts below VA
- Hanover
- 23.0%
- Virginia
- 30.4%
165 tests, 2008 to 2017
Median result
1.9pCi/L
Below action level
- Hanover
- 1.9 pCi/L
- EPA
- 4.0 pCi/L
Midpoint of the tests, 2008 to 2017
Tests reported
165
48th of 84 by tests
- Hanover
- 165
- 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
67 of 84
Lowest quarter
- Hanover
- 23.0%
- Russell
- 67.3%
By share, of 84 with 30+ tests
Read a result for Hanover County
Starts at Hanover County's median, 1.9 pCi/L
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 1.9 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. Hanover County's median reported result, 2008 to 2017.
The data
Hanover County, At a glance
Hanover County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: High across 52% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Hanover County, 2008 to 2017, laboratory
Under 2 pCi/L: 50%2 to 4 pCi/L: 27%4 pCi/L and above: 23%
Of 165 pre-mitigation tests reported to CDC, not homes in this area.
| Result band | Tests Measured | Share Measured |
|---|---|---|
| Under 2 pCi/L | 83 | 50.3% |
| 2 to 4 pCi/L | 44 | 26.7% |
| 4 pCi/L and above | 38 | 23.0% |
What these figures count
These are the 165 tests reported to CDC for Hanover 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).
Hanover County, Compared
Hanover County radon figures, compared
Calculated by Radon411Hanover County's 165 reported tests over the 2008 to 2017 laboratory totals had a middle value of 1.9 pCi/L and a maximum of 25.9 pCi/L, and 23.0% reached 4 pCi/L. Virginia as a whole (131 Virginia counties, pooled) comes to 30.4%: 7.4 points higher than here.
Among its state's counties it ranks 67th 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, 83 tests (50.3%) came in under 2 pCi/L, against 44.7% statewide, and 44 tests (26.7%) fell between 2 and 4, against 24.9% statewide. CDC's ten-year totals for Hanover County went from 126 tests (2005 to 2014) to 165 (2008 to 2017), the share going from 15.9% to 23.0%.
EPA's 1993 zone map puts Hanover County in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 52% of the county's land high radon potential.
Next door, the shares run from 27.0% in Henrico County to 38.1% in Louisa County.
CDC also counts 8 tests taken after mitigation in Hanover 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.
Hanover County, Geology
The ground under Hanover County
PredictedUSGS's geologic map splits Hanover County: 52.2% of its land is high radon potential and 47.8% low. The map puts 52.2% of Hanover County in the area it calls Goochland Terrane and 47.8% in Tertiary Coastal Plain Sediments. USGS gives the first a radon index of 13, in the high band (12 to 17), and the second 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Goochland Terrane | Granite, pegmatites, granitic gneiss, schist and gneiss, slate, and phyllite. | High | 13 | 52.2% |
| Tertiary Coastal Plain Sediments | Tertiary Coastal Plain sand, silt, clay | Low | 8 | 47.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Hanover County beside the ground around it
On high-potential ground Hanover County is close to Virginia as a whole: 52.2% of its land against 47.9%. Of the 7 counties that border it, 3 have more high-potential ground, Louisa County the most at 100%.
The map rates the ground, not the air in any home.
Local help
Hanover County, Local resources
Radon testing and mitigation in Hanover 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
Hanover County, Questions
Questions about radon in Hanover County
Are radon levels high in Hanover County?
Over the 2008 to 2017 laboratory totals, 23.0% of the radon tests reported to CDC for Hanover County, Virginia were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.9 pCi/L. Of 84 Virginia counties with 30 or more tests for the same period, 66 reported a higher share; pooled, the state comes to 30.4%.
Which counties border Hanover County?
Hanover County borders 7 counties: Caroline County, Henrico County, King William County, Goochland County, Louisa County, Spotsylvania County and New Kent County.
Products
Hanover County, Products
Testing a home in Hanover County
In Hanover County, 23.0% of 165 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 Hanover 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
MonitorAEGTEST
HOUND-1011S rechargeable radon detector with a screen
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Semiconductor sensor
First reading: Within 12 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Hanover County, Bordering counties
Counties bordering Hanover County
Calculated by Radon411- Radon levels in Louisa CountyEPA zone 1
38.1%at or above 4 pCi/L
Median 2.8 pCi/L · 289 tests · 15.1 points above Hanover County
- Radon levels in Spotsylvania CountyEPA zone 1
34.2%at or above 4 pCi/L
Median 2.7 pCi/L · 1,872 tests · 11.2 points above Hanover County
- Radon levels in Caroline CountyEPA zone 3
32.7%at or above 4 pCi/L
Median 2.5 pCi/L · 199 tests · 9.7 points above Hanover County
- Radon levels in New Kent CountyEPA zone 3
30.8%at or above 4 pCi/L
Median 2.4 pCi/L · 13 tests · 7.8 points above Hanover County
- Radon levels in Goochland CountyEPA zone 1
30.7%at or above 4 pCi/L
Median 2.4 pCi/L · 114 tests · 7.7 points above Hanover County
- Radon levels in Henrico CountyEPA zone 3
27.0%at or above 4 pCi/L
Median 2.1 pCi/L · 607 tests · 4.0 points above Hanover County
- Radon levels in King William CountyEPA zone 3
14.3%at or above 4 pCi/L
Median 2.4 pCi/L · 7 tests · 8.7 points below Hanover County
Hanover County, Cities and towns
Cities and towns in Hanover County
Hanover County is growing: the Census Bureau puts it at 116,423 residents on July 1, 2025, up 5.6% from 110,211 in 2020. That works out to 249 people per square mile of land. Ashland, its one incorporated place, has 7,982 residents, 6.9% of the total. Reported testing is thin here: 165 tests over 2008 to 2017, or 1.4 for every 1,000 residents (2025 estimate), where Virginia as a whole comes to 6.0.
Ashland is the one incorporated place here; CDC publishes no figure by town, so it reads Hanover County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Ashland | 7,982 | +4.9% | 6.9% |
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).
Hanover County, Homes
Homes in Hanover County
Hanover County is a place of houses on their own lots: 85% of its 43,983 homes are detached single-family houses, against 61% across Virginia. Half of its homes were built before 1990, close to Virginia's 1984: 11% date from before 1960 and 29% from 2000 or later. Owners live in 83% of the occupied homes (Virginia: 67%), so for most households a test and a fix are their own to order.
| Homes | Hanover County | Virginia |
|---|---|---|
| Housing units | 43,983 | 3,654,784 |
| Detached houses | 85% | 61% |
| In buildings of 5 or more | 7% | 19% |
| Mobile homes | 2% | 4% |
| Built before 1960 | 11% | 19% |
| Built since 2000 | 29% | 25% |
| Middle year built | 1990 | 1984 |
| Owner-occupied | 83% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.