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Radon Levels in Henrico County, Virginia

EPA puts Henrico County in Zone 3, its lowest radon zone, and 27.0% of its 607 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

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  • Share at 4+ pCi/L

    27.0%

    3.4 pts below VA

    Henrico
    27.0%
    Virginia
    30.4%

    607 tests, 2008 to 2017

  • Median result

    2.1pCi/L

    Below action level

    Henrico
    2.1 pCi/L
    EPA
    4.0 pCi/L

    Midpoint of the tests, 2008 to 2017

  • Tests reported

    607

    21st of 84 by tests

    Henrico
    607
    Fairfax
    8,657

    Reported to CDC before any fix, 2008 to 2017

  • EPA radon zone

    Zone 3

    Lower potential

    1. 1
    2. 2
    3. Zone 3

    1 highest, 3 lowest

    EPA predicts under 2 pCi/L indoors

  • Rank in Virginia

    61 of 84

    Middle half

    Henrico
    27.0%
    Russell
    67.3%

    By share, of 84 with 30+ tests

Read a result for Henrico County

Starts at Henrico County's median, 2.1 pCi/L

2.1pCi/L

EPA’s own thresholds; the figures are the area’s, never this home’s.

EPA’s reading of 2.1 pCi/L

Between 2 and 4 pCi/L

  1. Under 20 to 1.9 pCi/L
  2. 2 to 4consider a fix
  3. 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. Henrico County's median reported result, 2008 to 2017.

Interpret this readingWhat a fix costs

The data

Henrico County, At a glance

Henrico County at a glance

Predicted: EPA radon zone

EPA Zone 3: lower predicted potential

is EPA's lowest class, and its forecast for Henrico County as a whole is an average indoor of less than 2 pCi/L (less than 75 Bq/m³). A low zone clears no address in it: homes above EPA's turn up in all three zones.

USGS geologic potential: Low across 74% of the county's area

Predicted: EPA Map of Radon Zones

Measured: tests reported to CDC

Radon tests reported for Henrico County, 2008 to 2017, laboratory

Reported results by concentration band, Henrico County, 2008 to 2017, laboratory
Under 2 pCi/L: 48%2 to 4 pCi/L: 25%4 pCi/L and above: 27%

Of 607 pre-mitigation tests reported to CDC, not homes in this area.

Reported results by concentration band, Henrico County, 2008 to 2017, laboratory: data table
Result bandTests MeasuredShare Measured
Under 2 pCi/L29348.3%
2 to 4 pCi/L15024.7%
4 pCi/L and above16427.0%
What these figures count

These are the 607 tests reported to CDC for Henrico 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).

How to read these figures

Henrico County, Compared

Henrico County radon figures, compared

Calculated by Radon411

Henrico County's 607 reported tests over the 2008 to 2017 laboratory totals had a middle value of 2.1 pCi/L and a maximum of 46.5 pCi/L, and 27.0% reached 4 pCi/L. Virginia as a whole (131 Virginia counties, pooled) comes to 30.4%: 3.4 points higher than here.

Among its state's counties it ranks 61st 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, 293 tests (48.3%) came in under 2 pCi/L, against 44.7% statewide, and 150 tests (24.7%) fell between 2 and 4, against 24.9% statewide. CDC's ten-year totals for Henrico County went from 475 tests (2005 to 2014) to 607 (2008 to 2017), the share going from 25.9% to 27.0%.

EPA's 1993 zone map puts Henrico County in Zone 3, a predicted county average under 2 pCi/L. USGS geology rates 74% of the county's land low radon potential.

Next door, the shares run from 23.0% in Hanover County to 30.7% in Goochland County, with Hanover County below Henrico County.

CDC also counts 80 tests taken after mitigation in Henrico County for the same period: tests in homes where a fix was already in.

Henrico County against Virginia, the United States and nearby counties, 2008 to 2017, laboratory
AreaTestsAt or above 4 pCi/LMedianDifference from Henrico County
Henrico County60727.0%2.1 pCi/LThis county
Virginia, pooled131 counties, pooled53,19930.4%Not pooled+3.4 points
United States, pooled2,661 counties, pooled2,013,54435.7%Not pooled+8.7 points
Russell Countyhighest in the state4967.3%6.7 pCi/L+40.3 points
Norfolk citylowest in the state732.7%0.5 pCi/L−24.3 points
New Kent County, VAborders it1330.8%2.4 pCi/L+3.8 points
Goochland County, VAborders it11430.7%2.4 pCi/L+3.7 points
Chesterfield County, VAborders it73329.6%2.2 pCi/L+2.6 points
Powhatan County, VAborders it5028.0%1.7 pCi/L+1.0 points
Richmond city, VAborders it52027.7%2.1 pCi/L+0.7 points
Hanover County, VAborders it16523.0%1.9 pCi/L−4.0 points
Charles City County, VAborders it20.0%1.1 pCi/L−27.0 points
Where Henrico County's reported results fell, 2008 to 2017, laboratory, beside Virginia and the United States
ResultHenrico County testsHenrico County shareVirginia shareU.S. shareAgainst Virginia
Under 2 pCi/L29348.3%44.7%39.6%+3.6 points
2 to 4 pCi/L15024.7%24.9%24.7%−0.2 points
4 pCi/L and above16427.0%30.4%35.7%−3.4 points
Henrico County ranked among the 84 Virginia counties with 30 or more tests, by share at or above 4 pCi/L, 2008 to 2017, laboratory
CountyRankTestsAt or above 4 pCi/LMedian
Fluvanna County56 of 8438828.1%2.5 pCi/L
Powhatan County57 of 845028.0%1.7 pCi/L
Richmond city58 of 8452027.7%2.1 pCi/L
Loudoun County59 of 844,45727.4%1.8 pCi/L
Martinsville city60 of 843327.3%1.8 pCi/L
Henrico County61 of 8460727.0%2.1 pCi/L
Fredericksburg city62 of 8437526.1%2.3 pCi/L
Roanoke city63 of 841,01025.9%2.3 pCi/L
Lynchburg city64 of 8475325.9%2.2 pCi/L
Albemarle County65 of 842,17924.7%2.1 pCi/L
Bedford County66 of 8474923.5%2.1 pCi/L
Henrico County ten-year laboratory totals, against Virginia's pooled share
PeriodTestsAt or above 4 pCi/LMedianHighestVirginia, pooledChange from the row before
2008 to 201760727.0%2.1 pCi/L46.5 pCi/L30.4%+0.1 points
2007 to 201658826.9%2.1 pCi/L46.5 pCi/L30.6%+1.2 points
2006 to 201557325.7%2.0 pCi/L46.5 pCi/L30.7%−0.2 points
2005 to 201447525.9%1.9 pCi/L46.5 pCi/L30.3%First on file

Pooled shares: Radon411's sum of CDC's county counts for one period.

Henrico County, Geology

The ground under Henrico County

Predicted

USGS's geologic map splits Henrico County: 74.0% of its land is low radon potential and 25.2% high and 0.9% moderate. The map puts 74.0% of Henrico County in the area it calls Tertiary Coastal Plain Sediments and 25.2% in Goochland Terrane, with one smaller area beside them. 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).

USGS's geologic areas under Henrico County
AreaThe rock, in USGS's wordsPotentialRadon indexShare of land
Tertiary Coastal Plain SedimentsTertiary Coastal Plain sand, silt, clayLow874.0%
Goochland TerraneGranite, pegmatites, granitic gneiss, schist and gneiss, slate, and phyllite.High1325.2%
Mesozoic BasinsSandstone, siltstone and lacustrine black shale.Moderate110.9%

Names, descriptions and indexes: U.S. Geological Survey, Geologic Radon Potential Map (2025). Shares: Radon411, from the map cut to the boundary.

Henrico County beside the ground around it

Virginia as a whole has more high-potential ground than Henrico County: 47.9% of its land, against 25.2% here. Of the 7 counties that border it, 5 have more high-potential ground, Goochland County the most at 89.9%.

Share of land by USGS radon potential: Henrico County, the 7 counties bordering it and Virginia
AreaEPA zoneLow potentialModerate potentialHigh potential
Henrico CountyZone 374.0%0.9%25.2%
Richmond cityZone 371.4%None28.6%
Charles City CountyZone 392.5%NoneNone
New Kent CountyZone 395.1%NoneNone
Chesterfield CountyZone 138.9%27.0%33.8%
Hanover CountyZone 347.8%None52.2%
Powhatan CountyZone 1None21.2%78.8%
Goochland CountyZone 1None10.1%89.9%
Virginia133 counties, pooled by land areaVaries20.6%30.0%47.9%

The map rates the ground, not the air in any home.

Local help

Henrico County, Local resources

Radon testing and mitigation in Henrico County

What Virginia's program says
Phone
(804) 864-8161
Email
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

Henrico County, Questions

Questions about radon in Henrico County

Are radon levels high in Henrico County?

Over the 2008 to 2017 laboratory totals, 27.0% of the radon tests reported to CDC for Henrico County, Virginia were at or above 4 pCi/L, and the median reported pre-mitigation result was 2.1 pCi/L. Of 84 Virginia counties with 30 or more tests for the same period, 60 reported a higher share; pooled, the state comes to 30.4%.

Which counties border Henrico County?

Henrico County borders 7 counties: Richmond city, Charles City County, New Kent County, Chesterfield County, Hanover County, Powhatan County and Goochland County.

Products

Henrico County, Products

Testing a home in Henrico County

In Henrico County, 27.0% of 607 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 Henrico County.

Test kits and monitors3

See every kit and monitor

Best radon monitors for Henrico County homes, compared

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Henrico County, Bordering counties

Counties bordering Henrico County

Calculated by Radon411

Henrico County, Residents

Who lives in Henrico County

The Census Bureau estimates 342,775 residents in Henrico County for July 1, 2025, 7,846 more than in 2020 (+2.3%). Packed into its land, that is 1,467 people per square mile. Reported testing is thin here: 607 tests over 2008 to 2017, or 1.8 for every 1,000 residents (2025 estimate), where Virginia as a whole comes to 6.0.

Census lists no incorporated place in Henrico County: every home in it reads the county's figures.

Residents: U.S. Census Bureau population estimates for July 1, 2025 (Vintage 2025).

Henrico County, Homes

Homes in Henrico County

Of Henrico County's 142,964 homes, 64% are detached houses, against 61% across Virginia; 20% are in buildings of five or more homes. Half of its homes were built before 1984, close to Virginia's 1984: 19% date from before 1960 and 24% from 2000 or later. 65% of occupied homes are lived in by their owner (Virginia: 67%); in the rest a tenant can run a test, but a fix is the landlord's to make.

Homes in Henrico County, Virginia, 2019 to 2023
HomesHenrico CountyVirginia
Housing units142,9643,654,784
Detached houses64%61%
In buildings of 5 or more20%19%
Mobile homesunder 1%4%
Built before 196019%19%
Built since 200024%25%
Middle year built19841984
Owner-occupied65%67%

Census Bureau, American Community Survey, 2019 to 2023: estimates from a sample of homes, looser for a small place. Shares by Radon411.