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 Charles City County, Virginia
EPA puts Charles City County in Zone 3, its lowest radon zone, and only 2 radon tests from it are on file with CDC (2008 to 2017, laboratory totals). Homes with elevated levels occur in all three zones, so only a test measures yours.
Data checked By Radon411Methodology
Highest bordering
38.4%
James City County
- James City
- 38.4%
- Henrico
- 25.7%
3 of 6 neighbours have 30+ tests, 2006 to 2015
Nearest county
38.4%
James City County, 16 miles
- James City
- 38.4%
- Virginia
- 30.7%
Share at 4+ pCi/L, 73 tests, 2006 to 2015
Ground above low
None
77.9 pts below Virginia
- Charles City
- 0.0%
- Virginia
- 77.9%
Share of land USGS rates moderate or high potential
Tests reported
3
Too few for a share
- Charles City
- 3
- Needed
- 30
2007 to 2016, laboratory
EPA radon zone
Zone 3
Lower potential
- 1
- 2
- Zone 3
1 highest, 3 lowest
EPA predicts under 2 pCi/L indoors
Read a result for Charles City County
Starts at EPA's action level
EPA’s own thresholds; the figures are the area’s, never this home’s.
EPA’s reading of 4.0 pCi/L
At or above 4 pCi/L
- Under 20 to 1.9 pCi/L
- 2 to 4consider a fix
- 4 and aboveEPA says fix it
This result is at or above 4 pCi/L. EPA recommends fixing a home when the radon level is 4 pCi/L or higher.
The data
Charles City County, At a glance
Charles City County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 92% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Charles City County, 2008 to 2017, laboratory
CDC holds 2 reported tests for Charles City County over the 2008 to 2017 laboratory totals, with a median of 1.1 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Charles City County beside the counties around it is how this page reads it.
What these figures count
Only 2 tests were reported to CDC for Charles City County over 2008 to 2017 (laboratory totals), 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: 2008 to 2017, laboratory. Measured data period: 2005 to 2017 (every CDC figure on file).
Charles City County, Compared
Charles City County radon figures, compared
Calculated by Radon411CDC's largest figure for Charles City County rests on 3 tests over the 2007 to 2016 laboratory totals, 1 of them at or above 4 pCi/L, so each test moves its share by 33.3 points and no rank or comparison is drawn from it. Results reached as high as 4.7 pCi/L, with a middle value of 2.1 pCi/L.
Of the counties bordering it, 3 have a figure over the 2006 to 2015 laboratory totals: James City County reported the largest share at or above 4 pCi/L, 38.4%, and Henrico County the smallest, 25.7%, with Chesterfield County at 30.5% between. Farther out, Richmond city (26 miles away) at 28.0%, Newport News city (35 miles away) at 5.9% and Hanover County (36 miles away) at 16.0% have figures too. Pooled across 132 Virginia counties, 30.7% of reported tests reached that level; across every county in the country with a figure, 36.3%.
Statewide for the same period, Russell County reported the highest share (68.5%) and Norfolk city the lowest (5.3%). EPA's 1993 map puts Charles City County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 92% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Charles City County, Geology
The ground under Charles City County
PredictedUSGS's geologic map puts all of Charles City County's mapped land in one class: low radon potential. 92.5% of it lies in the area the map calls Tertiary Coastal Plain Sediments, to which USGS gives a radon index of 8, in the low band (5 to 8).
| Area | The rock, in USGS's words | Potential | Radon index | Share of land |
|---|---|---|---|---|
| Tertiary Coastal Plain Sediments | Tertiary Coastal Plain sand, silt, clay | Low | 8 | 92.5% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Charles City County beside the ground around it
Across Virginia 47.9% of the land is rated high; none of Charles City County's is. Of the 6 counties that border it, 2 have more high-potential ground, Chesterfield County the most at 33.8%.
The map rates the ground, not the air in any home.
Local help
Charles City County, Local resources
Radon testing and mitigation in Charles City 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
Charles City County, Questions
Questions about radon in Charles City County
Are radon levels high in Charles City County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Charles City County, Virginia were at or above 4 pCi/L, and the median reported pre-mitigation result was 1.1 pCi/L. Of the counties bordering it, 3 have a figure over the 2006 to 2015 laboratory totals: James City County reported the largest share at or above 4 pCi/L, 38.4%, and Henrico County the smallest, 25.7%, with Chesterfield County at 30.5% between.
Which counties border Charles City County?
Charles City County borders 6 counties: New Kent County, James City County, Henrico County, Prince George County, Surry County and Chesterfield County.
Products
Charles City County, Products
Testing a home in Charles City County
No CDC figure names Charles City County; the nearest county with one, James City County (16 miles away), reported 38.4% of its tests at or above 4 pCi/L over the 2006 to 2015 laboratory totals, the only reading nearby until a test of this home. 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 Charles City 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
MonitorPYZYCKYH
RD17 plug-in radon detector with a rechargeable battery and 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
Charles City County, Bordering counties
Counties bordering Charles City County
Calculated by Radon411- Radon levels in New Kent CountyEPA zone 3
41.7%at or above 4 pCi/L
Median 2.8 pCi/L · 12 tests
- Radon levels in James City CountyEPA zone 3
38.4%at or above 4 pCi/L
Median 2.4 pCi/L · 73 tests
- Radon levels in Chesterfield CountyEPA zone 1
30.5%at or above 4 pCi/L
Median 2.2 pCi/L · 645 tests
- Radon levels in Henrico CountyEPA zone 3
25.7%at or above 4 pCi/L
Median 2.0 pCi/L · 573 tests
- Radon levels in Prince George CountyEPA zone 3
18.2%at or above 4 pCi/L
Median 2.2 pCi/L · 11 tests
- Radon levels in Surry CountyEPA zone 3
No CDC figure for 2006 to 2015; its page reads it against its own neighbours.
Charles City County, Residents
Who lives in Charles City County
About 6,623 people live in Charles City County by the Census Bureau's estimate for July 1, 2025, 124 fewer than in 2020 (−1.8%). That works out to 36 people per square mile of land. Reported testing is thin here: 3 tests over 2007 to 2016, or 0.5 for every 1,000 residents (2025 estimate), where Virginia as a whole comes to 5.6.
Census lists no incorporated place in Charles City County: every home in it reads the county's figures.
Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).
Charles City County, Homes
Homes in Charles City County
Charles City County is a place of houses on their own lots: 85% of its 3,269 homes are detached single-family houses, against 61% across Virginia. Half of its homes were built before 1990, close to Virginia's 1984: 15% date from before 1960 and 28% from 2000 or later. Owners live in 86% of the occupied homes (Virginia: 67%), so for most households a test and a fix are their own to order.
| Homes | Charles City County | Virginia |
|---|---|---|
| Housing units | 3,269 | 3,654,784 |
| Detached houses | 85% | 61% |
| In buildings of 5 or more | 1% | 19% |
| Mobile homes | 11% | 4% |
| Built before 1960 | 15% | 19% |
| Built since 2000 | 28% | 25% |
| Middle year built | 1990 | 1984 |
| Owner-occupied | 86% | 67% |
Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.