Short-term kit
Radon Short Term Test Kit short-term charcoal radon test kit, lab fee included
- Lab fee included
Method: Charcoal
In home: 2 to 7 days
Locations and reports
Radon Levels in Middlesex County, Virginia
EPA puts Middlesex County in Zone 3, its lowest radon zone, and only 4 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
Nearest county
38.4%
James City County, 24 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
- Middlesex
- 0.0%
- Virginia
- 77.9%
Share of land USGS rates moderate or high potential
Tests reported
4
Too few for a share
- Middlesex
- 4
- Needed
- 30
2008 to 2017, 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 Middlesex 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
Middlesex County, At a glance
Middlesex County at a glance
Predicted: EPA radon zone
EPA Zone 3: lower predicted potential
USGS geologic potential: Low across 94% of the county's area
Predicted: EPA Map of Radon Zones
Measured: tests reported to CDC
Radon tests reported for Middlesex County, 2008 to 2017, laboratory
CDC holds 4 reported tests for Middlesex County over the 2008 to 2017 laboratory totals, with a median of 2.1 pCi/L: too few to describe a county (Radon411 reads a share from 30 tests up). Middlesex County beside the counties around it is how this page reads it.
What these figures count
Only 4 tests were reported to CDC for Middlesex 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).
Middlesex County, Compared
Middlesex County radon figures, compared
Calculated by Radon411CDC's largest figure for Middlesex County rests on 4 tests over the 2008 to 2017 laboratory totals, 0 of them at or above 4 pCi/L, so each test moves its share by 25.0 points and no rank or comparison is drawn from it. Results reached as high as 3.5 pCi/L, with a middle value of 2.1 pCi/L.
The nearest counties with a figure are James City County (24 miles away) at 38.4%, Westmoreland County (36 miles away) at 14.3% and Newport News city (36 miles away) at 5.9%. 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 Middlesex County in Zone 3, its lowest label: a predicted county average under 2 pCi/L. USGS geology rates 94% of the county's land low radon potential.
Pooled shares: Radon411's sum of CDC's county counts for one period.
Middlesex County, Geology
The ground under Middlesex County
PredictedUSGS's geologic map puts all of Middlesex County's mapped land in one class: low radon potential. 93.8% 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 | 93.8% |
Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.
Middlesex County beside the ground around it
Across Virginia 47.9% of the land is rated high; none of Middlesex County's is. None of the 4 counties that border it has any moderate-potential ground either.
The map rates the ground, not the air in any home.
Local help
Middlesex County, Local resources
Radon testing and mitigation in Middlesex 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
Middlesex County, Questions
Questions about radon in Middlesex County
Are radon levels high in Middlesex County?
Over the 2008 to 2017 laboratory totals, 0.0% of the radon tests reported to CDC for Middlesex County, Virginia were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.1 pCi/L. Of the 8 nearest counties with a figure, within 54 miles, the share of tests at or above 4 pCi/L runs from 5.3% to 38.4%.
Which counties border Middlesex County?
Middlesex County borders 4 counties: King and Queen County, Gloucester County, Mathews County and Essex County.
Products
Middlesex County, Products
Testing a home in Middlesex County
No CDC figure names Middlesex County; the nearest county with one, James City County (24 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 Middlesex 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
MonitorX-Sense
XR0B-SR battery digital radon monitor with an alarm
- C-NRPP 2024/25: Not included
- Battery
- Alarm
- Screen
Method: Alpha spectrometry
First reading: Within 24 hours
- See every kit and monitor Test kits and monitors
Test kits and monitors: 1 of 3
Explore
Middlesex County, Bordering counties
Counties bordering Middlesex County
Calculated by Radon411- Radon levels in Mathews CountyEPA zone 3
66.7%at or above 4 pCi/L
Median 4.0 pCi/L · 3 tests
- Radon levels in King and Queen CountyEPA zone 3
28.6%at or above 4 pCi/L
Median 2.4 pCi/L · 7 tests
- Radon levels in Gloucester CountyEPA zone 3
28.6%at or above 4 pCi/L
Median 2.1 pCi/L · 7 tests
- Radon levels in Essex CountyEPA zone 3
9.1%at or above 4 pCi/L
Median 1.9 pCi/L · 11 tests
Middlesex County, Cities and towns
Cities and towns in Middlesex County
The Census Bureau estimates 10,841 residents in Middlesex County for July 1, 2025, 232 more than in 2020 (+2.2%). That works out to 83 people per square mile of land. Urbanna, its one incorporated place, has 508 residents, 4.7% of the total. Reported testing is thin here: 4 tests over 2008 to 2017, or 0.4 for every 1,000 residents (2025 estimate), where Virginia as a whole comes to 6.0.
Urbanna is the one incorporated place here; CDC publishes no figure by town, so it reads Middlesex County's.
| Place | Residents | Since 2020 | Share of residents |
|---|---|---|---|
| Urbanna | 508 | +1.8% | 4.7% |
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).
Middlesex County, Homes
Homes in Middlesex County
Middlesex County is a place of houses on their own lots: 85% of its 7,140 homes are detached single-family houses, against 61% across Virginia. Half of its homes were built before 1982, close to Virginia's 1984: 25% date from before 1960 and 21% 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 | Middlesex County | Virginia |
|---|---|---|
| Housing units | 7,140 | 3,654,784 |
| Detached houses | 85% | 61% |
| In buildings of 5 or more | 2% | 19% |
| Mobile homes | 9% | 4% |
| Built before 1960 | 25% | 19% |
| Built since 2000 | 21% | 25% |
| Middle year built | 1982 | 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.